OFNA 1/8 Buggys v2.0

[Vmax911]

No Problem, where did you order them from?

[CTRallyRacer2]

Horizon Hobby

[Lost Racer1]

they may still stick out a hair..

[CTRallyRacer2]

Does the Hyper 7 Pro have front Kickup? And is it true, that it has all the CVA axles are included? My LHS has the kit for $430.

[Draxx]

Now that I have my engine tuned and the bugs worked out of my MBX(knock on wood), I have an
observation....

A 4wd buggy does the most incredible 4 wheel power drifts on a baseball diamond :).I was close
to regretting my decision to get a buggy instead of another 1/10th truck, but my buggy has redeemed itself. I can only imagine it with a fast engine(not my p4).

[CTRallyRacer2]

Draxx, I'm with you on that... how do you have your carb setup? My car was bogging under full throttle and slow acceleration... but if I held 1/2 throttle for a second or two... the car would just become ballistic.
Now that I have turned the high speed needle to 2.5 turns out and then set the idle nice... and the low speed needle two turns in... it accelerates quickly (I think it might be clutch slip now).
So, now... if I want to make the stock car faster... I need to work on the suspension setup... and I'd REALLY like to know what a sliding clutch is... and why it would be better than the standard clutches. Is anyone running the Centax clutch? And what is a Centax clutch...lol

[Draxx]

To be honest, I am not sure what my settings are. I am alittle rich on the bottom(it loads up in about 5-10 seconds), but alittle throttle clears it up and top end is very good.
I put the Kyosho front white springs on the front and have to put stiffer springs on the back.
I also have to get the engine screws you ordered.The bolts sticking out the bottom doesnt cut it.

Here is a pic I took.

[Lost Racer1]

first-Hyper 7 has kickup! The MBX,R2,GTLX do not. The R2 plus does however(revamped Worlds2)

Centax clutches are used in onroad and are adjustable. I don't know exactly how they work so don't hold me to this please.

For those engine mount screws..Remember NOT TO OVER TIGHTEN them. The washers they come with act kinda like a suction device on the screw it self. So a good torque is all you need. Anything more will strip the screws..They are very soft.

[Draxx]

Thanks for the heads up on the screws Lost Racer.

[CTRallyRacer2]

Should I grab a strip of Lexan, and have it go over the engine bolts?

[Vmax911]

The lexan is a good idea. In fact, I covered the entire bottom of my chassis with lexan.

[CTRallyRacer2]

Has the all Lexan underside helped the buggy not dig in? What about your flywheel? Also, for all you MBX or RTR owners... what do you do with your shocks? I'm running 80wt oil and the thickest shock collars that the kit comes with.... and the shocks are still soft. Should I go to 100wt oil... and play with it like that... I'm going to order the pistons and such... but I first have to find the piston numbers... and then save a little cash for pistons, and oil... etc... Any suggestions would be great!

[anapg77]

I have been told that the "O" ringed pistons are the trick for these shocks and that they are not alot of $. When you switch to these you can go back to thin 20-30W oil.

[Draxx]

As was mentioned, different pistons. Stiffer springs would help alot. My buggy almost drags the rear end under acceleration. I replaced the front srpings and need to do the rears.

[CTRallyRacer2]

Ok... where can I get the pistons from? I checked Tower Hobbies and Horizon Hobbies... The other websites that I'm aware of (Nitrohouse and Ace-Hobbies, really have crappy websites and no search function).

[Vmax911]

You can find them at Ace Hobbies. Got to Online Parts Ordering, then to Ofna Worlds II/Worlds. Lock under the "shock parts" section. They are the second part down, and their only $3.16!

The lexan hasn't done much to prevent "dig in." My buggy doesn't really dig in that much. I'm using a Worlds I chassis, so it has kick-up. I also bought some tapered head screws from a hardware store to mount the engine with, and they don't stick out. But the lexan does protect that chassis from scratches.

Oh yeah, I did cut out a hole for the flywheel!

[CTRallyRacer2]

There is a Monster Blazer conversion for the MBX buggy right? I'm considering getting a more competative buggy... and converting my buggy into a monster truck... has anyone seen this conversion? How much is it, and where can I get it? I might not do the conversion right away... but I'd like to have the information I need to do it.

[Draxx]

I saw the conversion kit at my LHS for about $80.00.

[CTRallyRacer2]

Do you have a part #?

[CTRallyRacer2]

Anyone run a Megatech engine? I saw the MTC79PT-08 .21 motor in the RC Car Action buyer's guide for $199. It's an 8 port, 3hp motor. Should be good to play with for awhile... don't know about reliability though... don't it will last long.

[1134]

VMax, where did you get the lexan? Vision is doing the first race of the season a week from Saturday at 9am in Payson. Now if I can get my engine broken in, in time, I may be able to race :)


CTRalleyRacer, just get some MT3 rims and your favorite tmaxx tires and a tmaxx body.

[Vmax911]

I just got a couple of sheets of .030 lexan from Tower Cut it out and screwed it on!

[CTRallyRacer2]

What are MT3 rims? Who makes them?

[CTRallyRacer2]

Does anyone know what parts are needed to make the Ofna P4 engine non PS? I've pulled my pullstart out, and it has already bruised 3 fingers (from the engine refusing to start for a little while). So, I'm interested in getting a starter box, and ridding myself of the pull start.

[anapg77]

Look on the exploded parts view that came with you engine (if you still have it)

I think it's just a matter of a rear cover swap in order to get rid of the housing and 1 way bearing (sprag)

[chrisdafer45]

i just baught a gtlx off of ebay and i hope it will be here in 3 or 4 days. I don't like the body it comes with so can anyone tell my what other bodies will work for it (painted of not)

also where can you find dye for the rims and wing:confused:

[anapg77]

RIT dye from the supermarket or Walmart etc. works good. Its supposed to be for clothes but it works good on white plastic (and your hands)

[1134]

RIT dye won't dye plastic. But it does dye nylon. That is what most rims, spoilers, etc. are made of. OFNA does have some rims made of Lexan, the stuff bodies are made from, they will not dye.

RIT is also available from their website, www.rit.com.

[Lost Racer1]

Originally posted by CTRallyRacer2
Does anyone know what parts are needed to make the Ofna P4 engine non PS? I've pulled my pullstart out, and it has already bruised 3 fingers (from the engine refusing to start for a little while). So, I'm interested in getting a starter box, and ridding myself of the pull start.

Don't worry about converting it. Just drop it on a starter box..It will work fine. You're not going to notice the minimal difference between having it on there and not. Maybe just take the one way out..and leave the housing there...thats it..

[CTRallyRacer2]

Any ideas on my it takes so long to first start up? I figure a cold engine, but come on.... It takes awhile to get her fired up, but after that... maybe 2-3 pulls and she's running again. She seems to be turned well... rips off the line and accelerates well, good amount of blue smoke, etc...

[Draxx]

I noticed my p4 starts right away even when cold, but wont stay running very well until it is slightly warmed up. Once warmed up, it almost always re-starts on one pull. Maybe it is just the nature of the beast.

[CTRallyRacer2]

I've even upgraded my fuel lines and installed a fuel filter.

[CTRallyRacer2]

Draxx,

What glow plug and glow driver are you using? I'm using a McCoy MC9 plug and the Ofna "C" cell igniter. Maybe that's the problem...

[fezzy]

Hey guys, i bought a NMT about 3 months ago and although it handles really well i keep having one problem after another with it, its really quite fragile..... I have never driven hit hard, not even jumped it infact its not even been off-road yet but i wanna sell it along with my BMX and get something else thats going to be fast, strong and agile..... I found out off my m8 who bought a Hyper7 that he got it for £325! which is just in my budget if i get the money i want for my NMT and BMX but its either a Hyper7 or nothing because every other buggy is alot more cash.... SO how is it? i've heard there are some reliability issues with the front steering knuckles stripping but they can be replaced with kyosho steering knuckles from the MP5??? Apart from that how durable is it?

I understand that it is a big step up from a NMT with a 15FE but i understand how the 15FE works and can tune it, i look after the whole truck well and know regular maintainence work.... Do you think its going to be a good thing to get after 2 months with a NMT?? I had no previous nitro experience before i got my NMT but got my first R/C 10 years ago which was a tamiya blackfoot

[CTRallyRacer2]

The Ofna P4 engine... there seems to be a hole drilled and tapped in the crankcase for a boost bottle. So, I picked up a GS racing boost bottle, but the boost nipple (the one that attaches to the crankcase) is too small. Does anyone know what the hole is on the side of the casing? Can I modify a boost bottle to fit?

[hardcoretmaxx]

hay DaveU how is that 9.5 pro holding up have you broke any thing yet

[hardcoretmaxx]

hey how are the ofna picco comp engines

[RCNitrodude]

The Ofna Picco engines just simply rip. I have one in my buggy, and it flies, although tuning is a bit touchier than a force, it is still a great engine.

[Draxx]

CTRallyRacer2, In answer to your plug question... Ibelive I am using a McCoy 8 and a "c" cell ingniter as well. I have taken the plug out and put it on the igniter, it gets a good glow. I think my bottom end(low speed needle) is a tad rich and it loads up with fuel real fast until it
is warmed up. Once it is warmed up, it holds a nice idle for a good 10-15 seconds before loading up.

[sofast]

Hey guys! I just got an mbx r2, and need to find a front bumper. I dont have a manual or anthing so i dont have the part number..... could you someone give me the part number please?

Thanks,
Craig

[anapg77]

Look on Ebay for a front bumper. I just won one from GPeter. It came with front shock stay for $10.

[CTRallyRacer2]

Draxx,

I relooked over my stuff... and I'm actually using Dynamite plugs (MC9). Sorry about the misinformation. I played hooky from Work yesterday, and went to the off-road track. Ran the buggy and seriously chopped up my hands and that junky pull starter. So I picked up a starter box (it's actually for 1/10th scale.. since I'm thinking of picking up a 1/10th on-road car as well). It's an Ofna box with plug igniter attachment and gel cell (whole package), and new tires. Went back to the car... ripped the engine out of the buggy, cut the cord and removed one-way bearing. Then attached rear cover (less internals) and tossed the engine back in. Tried out the starter box.... whoo hoo, the gel cell was already charged. Ran another two tanks and then went home. It was fun, just have to go early before a race and play with the engine and set it up for the track. The MBX jumped well (and I still have stock pistons and springs, all that is in there is 80wt oil and spacer collars). O'well... time to learn how to 'fly' an 1:8th scale buggy.

[Draxx]

I noticed my pull starter is starting to die as well. I am not suprised...I read many people complaining about it on other forums(as the Torq .21 engine). I see a starter box in my future as well. I am alos thinking about the Ofna universal box so I can use it for different configurations
and vehicles later.

[hardcoretmaxx]

the old 9.5 pro's came with the yellow spoked wheels right and the new one come with the solid yellow wheels because my lhs has the one with the solid yellow wheels. I need help fast because he only has one and he will hold it for me

[sofast]

I didnt have any luck on ebay.... could someone give me the part number, or a link for a bumper in an online hobby shop? Thanks for any help!!

[Draxx]

The bumper is # 30240.

[Draxx]

It is about $6.00 at Ace.http://www.ace-hobbies.com/PartsPricing/worlds2/index.html

Good luck

[sofast]

Thank's. Just what i was looking for!:D

[Draxx]

CTRallyRacer2, just out of curiosity, which starter box did you get?? Or for that matter, am looking for a suggestion from anybody for a decent box for my buggy at a resonable price. With my birthday coming up and all...

[Draxx]

CTRallyRacer2, just out of curiosity, which starter box did you get?? Or for that matter, am looking for a suggestion from anybody for a decent box for my buggy at a resonable price. With my birthday coming up and all...:rolleyes:

[Vmax911]

I just use a standardard Duratrax 1/8 Starter box. It has one 12V motor and runs off a gel cell or you can hook it up to the full-size car battery.

I got if from Tower Hobbies "scratch and dent" for about $35. You can find some good deals there if your patient enough.

[CTRallyRacer2]

I ended up getting a 1/10th starter box. I just slapped on some stickers on the top of the box (pointing the direction the buggy needs to be) and then I put the buggy on sideways and start her up. I think I may pickup another Ofna one... but this time for an 1/8th scale. Except, I may wait till I find out exactly which competition buggy I'm buying so that I know the box will fit (my 1/10th will then be used for 1/10th on-road cars).

[Lost Racer1]

The ofna starter box will fit just about any buggy..I say just about because I haven't heard of one not fitting yet. The posts are adjustable as well to fine tune the fit.

[Draxx]

I am kind of leaning towards the Ofna universal box so I can use it later if I get another car
with a sideways mounted engine(1/10th truck).
Or just the basic 1/8 scale box with the gel battery. I assume you are happy with yours Vmaxx11?

[Vmax911]

Yep, it works just great! Before I got it I was trying to use my 1/10 box with two 540 motors, and that didn't cut it.

[Draxx]

I will keep that in mind and pop for the 1/8 th box..thanks.

[eman88]

i havent posted here in a while
well i just got my replacement p4 engine and i started to break it in a few days ago.
it is about 80-90 degrees out right now so it has been tough. i have detailed break in instructions from a ofna customer service guy. i have ran about 2 tanks through it
it is at about 3 turns out on the highspeed and flush on the low speed. it was spitting fuel out the exhaust, and edge of the manifold. so anyway, my pullstarter was soaked, so i took it off to try and dry it off. the spring exploded out. so is there any way to rewind the pullstart?
if so, please tell me how.

btw- ofna has very good customer service
if you have a problem call them up and just be nice to them

[Draxx]

I want to say there was another post under
"general discussion" about rebuilding a pullstarter in the last few days.

I am hoping mine will hang in there for another couple weeks 'till I get a starter box. The P4
pullstarts are as weak as I had heard before I got one. My cord is still good, but after only about a month, it doesnt alway retract fully. Oh well.

[CTRallyRacer2]

Draxx, check to make sure the screws are tight from the pullstarter to the engine. I had one vibrate loose and I lost that one, and before I knew it... the second had vibrated out and I only had one screw left.... so... after the pullstarter popped, I picked up the starter box and removed the pullstarter (just left the housing and the single screw to keep the housing on).

[Draxx]

I did indeed lose one pullstart screw...got the replacemet today as a matter of fact.

[CTRallyRacer2]

I guess a light coating of thread lock might be in order.

[AEAddict]

What's up my fellow Ofna'ers ? :D

[Draxx]

Not alot...did some tweaking today. Changed my diff fluids (5000ft,7000ct,3000rear), put some 70 wt in the shocks and replaced my missing pull start screw...as expected the Torq .21 screw fit perfectly. Now I am set to go bash around tommorrow.

Has anyone tried fitting a different body on the MBX other than the stock body? I assume the Ultra
GT fits. Anything else though?

[AEAddict]

Rock on :D

You could probably get a Crowd Pleazer body on there or something...

heh.. I really dunno

[CTRallyRacer2]

Well, I'm going racing on Sunday, and my LHS had very little in diff oils, so I picked up 10,000 for the center and 7000 for the front, I'm running pretty much nothing in the rear (just the stock grease). I'm thinking of popping open the rear diff anyways to apply some more grease in there. Well, we'll see if I can actually compete at one race... the last race I went to, I had a few problems (Damn RTRs!).

[Draxx]

I broke my car in with just grease in the rear, then threw some 1000 in there. Seem to work ok..
thought I would try heavier stuff.

[Vmax911]

Before I had a collection of diff oils, I mixed up some 5000 wt with a little bit of 35 wt shock oil to use for the rear. It did work, though I'm not sure what weight I ended up with!

[Draxx]

I have done the mixing trick with shock oils to thin or thicken them. Havent tried it with the diff fluids.

[chrisdafer45]

i just got my gt lx and i couldent wait to break it in. it sputtered on the first pull and started on the second even though the pull cord ripped out. once i fixed that break in was a sinch.

then two seconds into driving it the out put yoke came off.

second attemt; front right shock came off

third; wheel fell off and i lost the nut

forth; pull start spring came un hooked

fith;time to go to work (these thing arent free you know)


Moral is : when one recieves a rtr LOCKTITE EVERY THING FIRST:mad:

[sofast]

Originally posted by chrisdafer45
Moral is : when one recieves a rtr LOCKTITE EVERY THING FIRST:mad:
Yup, thats what everyone has told me to do to my buggy!!:D

[Draxx]

NO DOUBT !

I lost a wheel nut today as well...have some Kyosho nuts, but they dont cinch up tight. Off
to the LHS.

[CTRallyRacer2]

Calling all Ofna Force P4 owners! Ok, this is my dilemma. I'm starting to thing that I'm a total bung head with tuning motors, but tell me if this is the motor or me.

I set my P4 to 2.5 turns out, the low speed needle flush to housing and then tune from there (idle is set well). The engine runs great for a little while and then I bring it back to tune it for a little speed. I set it for 2.25 turns out and set the low speed in 1/4 turn. She runs GREAT! so I run around for a little. Then the engine sputters and dies. Bring it back in, and she doesn't want to start. I put her in the trunk of the car for 30 mins. or so and return. Set the car back to 2.5 turns out, low speed flush again, she fires up and runs decent (after dying 3 times while applying gas). After than she runs ok again, and then begins the process all over again. It's like it doesn't want to stay tuned. HELP!

[Draxx]

Well CT, I am no engine guru, but... I would adjust the high end needle first(leaving the low end flush) until you get decent speed on the mid to upper range. When you are stisfied that it is running decent and is not getting overheated, then
perhaps lean the low speed needle ALITTLE at a time until you get good acceleration and it holds a decent idle.

It sounds like maybe you were trying to do too many things at once(high and low settings).Start back at you original sttings, get the high end set up, then tune the low end. On my P4, I only leaned out the low end very little from flush and it accelerates good and keeps a good idle..by good I mean it idles for about 10-20 seconds before it starts to bog a bit from fluid in the case. My sttings are of coarse going to be different from yours(altitude,tempature and barometric presure are all factors).Hope this helps..kinda long winded arent I?

[CTRallyRacer2]

Yup. That's how I usually adjust. I was just setting everything back to normal, before attempting to tune the motor. Then start with the high speed. Once there, I work on the low speed to get it motivated off the line. She runs great for a little while, then gets weirded out on me. Then I have to start all over again.

[Draxx]

My guess would be you are overheating and it dies...then wont restart until cool again. Just a guess.

[CTRallyRacer2]

I would tend to agree. I just don't know how to make it run cooler. Maybe if I run it 3 turns out or something.

[eman88]

richen it up for more cooling, or cut a hole in the body above the fuel tank or in that area so air gets under the body

[CTRallyRacer2]

I'll try richening it to 3 turns out. The body has a hole where the heatsink pokes through. Maybe subliminally, I just want to get the Ofna Hyper motor.

[Draxx]

I would agree...even though the engine fits under the body, I cut out a hold the size of the head above the engine as well as a hold big enough for the fuel tank lid to open. I also put 4 small vent holes in the passenger side window for more air flow.

Try richening it on the top about 1/8 turn and see what happens. Just out of curiosity, does it overheat without the body on?? If so, it is too lean...if not, you need more cooling holes.:cool:

[junior]

All I'v ever had is Ofna vehicles and there great cars and the can take the abuse a beginner 1/8 driver dishes out.My first 1/8 was the blazer sst then i moved up to the Ultra Gt then the Worlds 1 an I'v now just purchased a Hyper 7 Pro,this is a sweet car the layout is great and it handles like a dream its equipt with an RB Worlds C3& an O.S.RZV-99 for back up, two Hitec 605 bb-mg i add the metal gears and an Airtronics M8 to top it off.
P.S. Here's a pick of last years car(worlds 1 with a truck body).I'll post a picks of the Hyper 7 Pro when i get some. :D

[Draxx]

Is that the Blazer body?? Cool paint scheme.

[junior]

No it's not a blazer body,it's a Chevy Silverado By proline for the e-maxx.The bodies tend to be over sized and fit very well on 1/8 buggies.

P.S. thanks for the complement i call it cellular.
P.S.S Here's the ofna buggy body that was on it.
Sorry it's a little blurry.

[eman88]

nice paint jobs!
right now im still breaking in my replacement P4.
it has been about 65 degrees out, and while running the car slowly, it quickly heats up to 230. this is the third tank, and it is a little higher than 3 turns on the high speed, flush on the low speed.

an ofna rep. told me to keep the temps between 180 and 200 for the first few tanks, never above 220.
did this happen for you guys?
i cant imagine how it will stay under 250-260 when i am running it fast if it hits 230 running slowly!

[Draxx]

To be honest I dont have a temp gun, so I "guestimate" tempeture via the old water/spit test. I know my engine was no doubt above 200 during breakin and still runs hot enough to boil water on the head in around 3-5 seconds. And that is somewhat rich. It runs good though and puts a fair amount of oil out the pipe and has good smoke during accelartion and high speed, so I am going with it as is.

I have read here and elsewhere that the P4 engine
simply runs hot. I think it is the nature of the
beast. Although it seems like a decent engine and tuned pretty easy, I think my next one will be an O.S., I have always liked them for reliability and ease of tuning.

[anapg77]

My P4 p/s has a Venom temp. display on it. I switched to this because I got tired of "shooting" it with the Raytec temp. gun.

In either case it runs hot as heck with a conservative main and idle mixture. How about 265-285 fully warmed up and close to 300 after a long high speed run around a old baseball field.

As far a gun vs. sensor, I get about a 20+ degree difference in temp due to location. With the gun I aim for the glow plug or button and the Venom unit is installed per directions 90 degrees away from exhaust port down low on the head.

Hope this makes you feel better. (my engine has about 1.5 gallons through it and is still tight.)

[eman88]

thanks
i ran half a tank at half throttle and it hit 235-240, i turned it off then.


thanks again- that does make me feel a lot better


btw- i just heard about this venom onboard temp gauge. how long is the wire from the unit to the end of the loop?


is the venom consistenly off by 20 degrees compared to the raytech. i dont care if it is always off by the same amount because i can just adjust for that in my head.

also where is this venom gauge avaible and how much is it?
thanks

[anapg77]

I got my Venom gauge at a hobby show from Brooklyn Hobbies for $25. The wire is 6 inches which is perfect for my Ofna R2 because I have it mounted to the upper steering brace.

Another nice feature about the Venom unit is that it stores the highest temp. it monitors.

[anapg77]

The deviation between the 2 temp. methods was 5 for 5 at 20-30 difference . I don't use the Raytec any more.

[RCNitrodude]

I finally had the chance to get my Worlds 2 out and give it a good solid run, and get some jumps in, and I gotta say, that buggy is just too sweet! I still need a better steering servo, but, otherwise, it handles well. I rather run that than my TMaxx now.

[Jared]

I was thinking of getting the MBX R2 at Ace. This would be my 1st gas car. What I need to know is what do i need to get the car running. Price is a factor. So if anyone can back down what I need it would be a great help.

Also if anyone of you have this car what do you think of it? Thanks

[anapg77]

You can search this board for info about this car. I have one and I like it alot for a backyard basher. I would recommend some other R/C experience before moving in to 1/8 unless you are a "natural tinkerer". Nitro can be fustrating if you are a novice to internal combustion engines.

Mail me for more info if you like.

[RCNitrodude]

The MBX R2 is not a RTR, so, you will need a .21 buggy engine, the Ofna Force P4 is perfect for the mbx, radio gear...a 2 channel radio, reciver, and two servos, high torque for steering and a mid range torque for throttle and braking, a reciever battery pack, fuel, glow plugs, and ingitor. Ace has the build a combo deal on the website, whcih cuts cost down alot, the radio grear, the fuel, and reciever pack are the only things not covered.

[anapg77]

The R2 plus looks like a sweet RTR if you want to go that way.

[RCNitrodude]

The R2 Plus *IS* a sweet rtr, it's a Worlds 2 chasis with a Picco engine, and the high end Ofna tuned exhaust. I've had ine for a few months now, and have been able to really get out and run it, and I gotta say, I can't wait to race it!

[morfracerX]

if you can find one on e-bay that is ready to run that would be the best thing, like one of those getting out of the hobby sales then you get the tool box extra parts and all.I got my w2 with an XR3 a crap motor and a starter box RTR for $320 shipped.

i have never seen the mbx R2 plus but with that w2 frame it has to be great that kick up on the w2 was the main reason i got it over the MBX R2

morfeeisracerX

[morfracerX]

By the way hey lost racer and V-maxx

morfracerX

[Lost Racer1]

W2 was my first 1/8 scale..Awsome buggy!! The R2 plus being the rtr w2, check to make sure your piston holes are good sizes.. So you don't have to use the higher weight shock oils..

Hi Morf!

[RCNitrodude]

Yeah, the pistons should be replaced in the R2 plus, I'll probably rebuild them on mine at at the same time I fill the diffs with silicone. I have to use 60wt oil to get the best performance out of the shocks, and those stock silver springs are too soft. The only other things it needs are thread locking the screws, and that was no big deal, gave me a chance to do some wrenching, and higher torque servos. But, I still gotta say, the R2 plus is a deal that is too good to pass on, if you are looking for a good rtr buggy, at a decent price.

One question, for the diff fluid, what is a good wt to use in each diff?

[Lost Racer1]

front 3000-5000:Center 7000-10000:Rear 1000-3000

It all depends on your terrain..Its in 3 different places within this thread already :D..A good start is 5000-7000-3000 and work from there..

[DR_RC_LUVA]

Hey guys....Just wanted to say hi and ask a couple questions. I just ordered a MBX RTR a couple days ago and first off wanted to know if you guys thought I got a good price. I paid $350 for a new in box MBX RTR. Secondly, I have skimmed through this massive thread, but there is alot to read. What are the main screws I need to loctite before I run the car? The outdrive screws? Also, will I need to remove the diffs to add shims to them? Is there still a problem with gears getting stripped? Thanks for any help..

[littlej72]

I have an MBX R2 on the way and I am setting it up as my runner/racer. I know that a good steering servo makes a night and day difference and i was wondering what everyone think on this subject. Considering it's not a super high end car i am not going to shell out half of its cost in a servo, i am thinking of using a Tower Hobbies TS-71 since I have a brand new one lying around left over from when i sold my t-maxx. But if thats to slow or not enough lemme' know. Also honestly what engines are good and bad. I have a lot of experience with 12's and 15's(small block's) but not too much with 21's I had an os rg on my landmax and thought that was pretty fast. I am looking at the highline OS-01 motor just because I think it will be plenty fast and definately you cant beat OS reliability!So any input would be great!

[RCNitrodude]

Thanks LostRacer1...three times, eh? Well, with 40+pages, I don't remember which ones have the info, and don't really have the time to go through every one of them :D

[Lost Racer1]

RCNitrodude- Exactly!:D No problem.

littlej72- Remember this: Servos are removable. Wether or not you think your buggy is worth expensive electronics will make all the difference in your experience with it. Cheaper non-quality products usually have higher risk in failure. Let me ask you this, Would you rather buy a servo that fails once a week just because you know the manufacturer will replace it? Or would you rather have one that is less likely to fail overall and STILL know the manufacturer will replace it in case of problem? The OS is a very powerful engine. You'll enjoy it.

DR-RC-LUVA- LOCTITE ALL METAL TO METAL SCREWS except the engine mount bolts..NEVER loctite those. Yes do the setscrews as well. Not sure if the gears are still stripping. But since you have to pull the diffs apart anyway to add diff fluid to them check their mesh.:D

*Quick note: For those that are going through the pages in the thread..If you're looking for something specific IE does have a word find feature that will allow you to search for a particular item on a page without having to read everything. Just press cntrl f :D

[eman88]

the problem with that search feature(ctrl and F) is that you would have to do it on every page.

but anyway

could an airleak in the fuel lines, cause an increase in temps of 40-50 degrees?


im breaking in my p4.
i have a mccoy mc9 plug, with odonell 20% fuel
HS needle is at 3 turns, LS is flush.
im still breaking in this replacement engine, but it will hit 230*F in under 3min of low throttle and idling.
is this normal
i dont see how it will run less that 270* when i am running it hard.
so do you think the problem could be an airleak?

[anapg77]

Is it a pull start ? I heard p/s engines leak air at the one way bearing.

My P4 runs extremely hot all of the time (it's a pull start) and yet it still lives. It will be in the low 300's after a hard run. I'm not changing anything because I have come to the conclusion (from others also) that this motor just runs hot.

I have tried a variety of fuels and needle settings and it still runs hot. Body off or on not much difference either.

[Lost Racer1]

control f- this is true, you would have to do it on every page, but for those with broadband its really not a task. :D anyway, how is your idle? steady or erattic(sp)?if its steady you're probably ok. whats your smoke like? is there a lot?

[eman88]

yes it is a pullstart, and i have run about 5 and a half or 6 tanks
at 3 turns i still have a ton of smoke
especially the first time i rev the motor.
if i hit the gas most of the time it will die because it is so rich.
i really dont remember what the idle is like. it is a little rough, but pretty steady.
sorry if i asked this, but what do you guys seal the engine with, and where?
I was told to seal the carb, and the backplate, and to replace the fuel lines.
What else should i seal, and with what?
THanks

[Lost Racer1]

Carb, Backplate, And banjo(highend needle fitting).

Are you still breaking it in? or have you tried tuning for power yet?

Seal it with gasket sealer, I can't remember the nme of it right now, I think its Permatex or something?? I'll check when I get home tonight.

[anapg77]

Any RTV silicone will do. The stuff that is high temp. and oxygen sensor safe is the best. It is made by Permatex.

[DR_RC_LUVA]

Hey guys, my Ofna MBX came in yesterday. This is my first 8th scale buggy and when I first opened the box I said "Wow those wheels are big" followed by "Geez this thing is heavy as a tank" Now I see why they have to be powered by .21 engines....Based on the pictures in the manual, I must have an updated model with slight differences. One that I can think of off hand is that the switch is now located on the battery and receiver cover with a rubber protector. In the manual it shows it elsewhere. Also, I was planning on loosening some important screws to loctite them, like the outdrive grub screws and what not but I could not even get that bugger loosened! I wasn't torqing it will full force, but I was turning pretty hard and it wouldn't budge. I wonder if they are loctiting them at the factory now. I am very pleased with the quality of the kit so far, I did have a problem getting the engine running initially but I think I was flooding it. I have yet to start break-in, I just started it to make sure it would run. I drained the way too soft shock oil that it comes with and replaced it with 90wt oil. Based on the change in damping, I would guess that they put like 70-80wt in there at the factory. I'll let you guys know how things go.........later

[Lost Racer1]

Don't forget to fill your diffs with silicone fluid!! If not, you risk burning up your gears fast.

[anapg77]

I'm jealous mine didn't come with a RX box like that. I know alot of the GTPs do.

Any body know the part # and cost to upgrade ?

[anapg77]

Is anybody running a 2 speed in an Ultra series? I just put one in and swear I can not hear it shift. I have had the spring tension setscrew for 2nd gear at several different settings hoping maybe that I could hear it shift (earlier or later)

I have had it apart 4 times verifying that the arm can be flung out for second and the the sprag (one way roller) is ok for first.

The thing is fast enough with an O-1 so it's hard to tell.

[DR_RC_LUVA]

Originally posted by Lost Racer1
Don't forget to fill your diffs with silicone fluid!! If not, you risk burning up your gears fast.
Isn't there fluid in there from the factory? I got the RTR version. If not can you tell me exactly what I need to buy, and does it go in all 3 diffs?

[offroad fanatic]

hey guys im so happy i get my new sleeve monday or tuesday of next week i cant wait to finally run my car. i have waited sense chrismas to run the thing. i cant wait im so excited. im hopping i can get some knew wheels soon for it so that it can go on the road. and does anyone have any suggestions to what kind of tires i should get for dirt. the car came with the ofna exels and they are really great tires but i think that i might need some others for the gravel road i might run it on. k thanks for the input and go to my forum to talk about the ultra gt lx if you have the buggy or u just want to find things out about it k thanks again.:)

[morfracerX]

Originally posted by DR_RC_LUVA

Isn't there fluid in there from the factory? I got the RTR version. If not can you tell me exactly what I need to buy, and does it go in all 3 diffs?


some peoples diff have come dry with not a drop of diff oil . it's just always better to make sure

[morfracerX]

Originally posted by DR_RC_LUVA

Isn't there fluid in there from the factory? I got the RTR version. If not can you tell me exactly what I need to buy, and does it go in all 3 diffs?


some peoples diff have come dry with not a drop of diff oil . it's just always better to make sure

anapg



you might want to ( i know) try and rebuild it again, also sit it on a box with all 4 wheels off the ground and rev that sucker just to make sure that it's not shifting. i only had one 2spd in my day but i think the tighter that set screw is in the higher the rpms have to hit before a shift. hust a thought.

offroad

i would say look on ace-hobbies.com they have a lot of offroad tires for the ofna line of cars, for lose gravel i would run with the ex you alread have or the Woops II

http://www.ace-hobbies.com/Images/tires/unmounted/82025.jpg


and for the road tires i would run with these unless you will be running on a prepared surface otherwise these will do you great for the street
http://www.ace-hobbies.com/Images/tires/unmounted/9012.jpg
( i have been a road hawgz/rage ***** from the day they came out for the rc10t years ago)

[Lost Racer1]

RTR's from the factory USUALLY come with grease in them. Its better to clear that out and fill it with diff oil. Yes it goes in all 3 diffs. I believe a page back is where we posted that info. :D Good Luck.

Morf- Weren't you up a little late to be posting? ;)

[morfracerX]

well i was sleep surfing

[anapg77]

As with everything else; a little silicone (permatex) on the diff. 'o' ring(s) will ensure a leak free seal.

[morfracerX]

anapg what happen with the 2spd?

[Lost Racer1]

Originally posted by morfracerX
well i was sleep surfing

That explains it ;)

[anapg77]

Haven't run it since Thurs. due to a tire failure. I had a brand new pair of Ofna tires on the front and a huge chunk just flew out of the middle of one of the tires.

I am not sure what caused the failure but running off-road spike tires on the street didn't help.

2 days before this happened I ordered tires from Nitro House.
I am waiting on the postal service to get up and running.

In the mean time I am going to tear down the 2 speed and possibly connect it to a die grinder at work to simulate it being in the vehicle and under power . I want to physically see the little arm extending on its own that enables 2nd gear. (at rpm)

[DR_RC_LUVA]

I took out the MBX today to break-in and run. First off I started laughing at the stock steering servo for the RTR. That will be the first thing to go. The performance was overall about what I expected. The stock Force P4 engine did not have enough ummph to get me very excited, exspecially after being use to running my Picco powered Nitro TC3 and and GT truck. Acceleration was a little sluggish, I would guess top speed to be in the mid 30's somewhere. I have to remember that the engine is not completely broken in though, it will only get faster with time. I'm looking to get the Picco sport to replace the P4 with. Can you guys recommend another pipe? Or is the stock pipe actually pretty good? thanks.......

[Vmax911]

Hey guys, I've been on vacation for a while, but I thought I'd drop in to say hi. Nice to see you here Morf!

Also a quick tip. I installed a metal rod between my center differential and rear differential. It has made the car a LOT stiffer! No more chassis flex when I push down on the engine while on the starter box. I made it with a threaded metal dowel and an old diff casing, so it cost under $2.00!

[Meestor_X]

Hey everyone;

I am looking to get either the Hyper-7 RTR (p.n. OFN14326) or 9.5 RTR (p.n. OFN34956), but I have to order it because my local hobby shop doesn't stock these cars.

The only problem is that I can't find out any information on what is included with either of these packages.

The web site has no info, neither does Ace, Horizon, or any other supplier I can find on the web.

Here is what I'd like to know for each package:

1. Is a radio included? If so, which one?
2. Is an engine included? If so, which one?
3. What other accessories are included?

They are both exactly the same price, what are the major differences between the 2 cars?

Thanks for any and all help!!

-Andy.

[eman88]

the hyper 7 has a hyper pull engine.
the p.5 has the P4 pull engine.

they both have all electronics and exhaust needed

[Meestor_X]

Thanks for the info.

Is one of those engines better than the other?
Any opinion on which package is better than the other, considering they are both exactly the same price?

-Andy.

[morfracerX]

DR RC

Hey XTM just came out with a.24 that I am looking at putting in my MP so that might do the trick if you want some more power. some pipes give you more low end and other top end so what one would you rather have? for now i would stick with the stock pipe, is that the same black pipe that comes with the worlds2? if so stick with it. as far as that servo yea some people actually stripped them out on their first run so that is a must for the mbx rtr. did you check your diffs yet?


Meestor_X

I would run with the 9.5 but that's me I have never ran either one so what do I know. In a head to head I would say the hyper would work over the P4 but I would not keep neither one for long so then again thats just me.


anapg77

lol my worlds2 would eat up tires when I ran on the street it was so dam funny it would tear chunks of rubber off the rims. I could not even turn on the street without almost coming to a complete stop due to traction rolls, that thing would stick to the road like it was nailed; down. the w2 is one sick buggy!!!




runs off to e-bay to look for another w2

[anapg77]

I hear of a lot of people speak highly of the W2. Why did Ofna discontinue them?

[Lost Racer1]

They made the worlds 2 RTR( R2 Plus) and renamed it.

Between the Hyper 7 and the 9.5, its a toss up. They'll both perform well under most conditions without a problem. I have a Hyper 7 Pro, and just love it! I haven't seen a 9.5 in action yet so I can't give you a fair opinion on it. But I hav seen the Hyper 7 RTR go to work at my local track. Andit just flies!

[DR_RC_LUVA]

MorphracerX- I took out the MBX again yesterday and after some fidgeting with the tuning, I found the sweet spot. I was much more pleased with the power and performance as its getting broke-in and tuned properly. Acceleration is pretty strong now, and I would guess top speed to be around 40mph or close to. I have not checked the diffs yet as i've not even bought the diff fluid yet. None of my local hobby stores carry 1/8 buggy parts. I will have to mail order everything I need, no biggie though. I'm kicking myself for not getting the Hyper 7 RTR instead. I paid $350 for my MBX RTR, and I think you can get the Hyper RTR for $100 more. I was thinking of upgrading my engine to the Hyper 21, and after doing that the Hyper 7 RTR would have been more than paid for which already comes with that engine. :( Oh well, live and learn. Besides having a different engine and pipe, are there any real big advantages the Hyper 7 has over the MBX?

Oh also, I will be upgrading to a different engine soon. I'll be putting that P4 into mt T-maxx :D I really like the pullstart engines, but I do realize that if I want a fire breathing 2.5 horsepower 40,000rpm monster, i'll have to get a non-pullstart. I was looking strongly at the Ofna/Picco sport. I really like Picco engines and I heard this engine is very fast and seems under-rated. It is rated at higher HP than the Force P4, but actually has 3000 less RPM's. I don't want to get an engine with less RPM's than what I had stock. Somehow I doubt thats the case though. What are your guys impressions of the Picco sport?

[RCNitrodude]

The Picco sport is a good engine, tuning is as easy as the P4, and with a good tuned pipe it kicks. The power output is more than the P4, in a drag race, my buggy will outrun a buggy equiped with the P4 easily. The only thing I do not like, my Picco has the pullstart, the cord broke, and got tangled in the recoil spring. I now have a good excuse to get that starter box... Overall, though, I have to give the Picco sport an excellent rating for a sport engine.

[ofnaman]

www.bobbylo.com/rccars/1.mpg

www.bobbylo.com/rccars/2.mpg

These are from sunday with my 9.5 Pro . What do you guys think?

[Meestor_X]

SWEET!!!

Can't wait till I have my very own!

[anapg77]

What's the deal with Ofna's new clutch type 2 speed? I saw one on Ebay and according to Nitro House this is the new setup.

BTW I got my tires today so I should be up and running tomorrow to finally dial in my "old style" 2 speed.

[anapg77]

Awesome air Ofnaman !!!! You are CRAZY to be jumping an expensive buggy like that !!!!

[ofnaman]

anapg77 you are right when I get done I always say to my self what were you thinking ,but its so much fun. My legs shake because I always think of how much it could cost with one throttle / brake error.

[anapg77]

NO GUTS NO INTERNET VIDEO (GLORY)

[eman88]

i saw those vids over at maxxtraxx(im eman1). i cant get over how nice that air is.

[spowell940]

So I was just catching up on this thread and noticed a lot of talk about diff fluid on the MBX RTR. I had to take off my rear diff to replace the pull start and noticed some grease on the gears in there. Is that not sufficient to have? Additionally, if the diff fluid thick like grease or a liquid like in shocks? Is liquid, how does it stay in the diff and there was no cover or anything. Please help. Sounds like I need to hit the store and get some diff fluid.

Thanks.

[Lost Racer1]

Diff fluid is like shock oil, but thicker. The pr-installed grease wears down pretty fast. If you've taken the diff apart there should be a large O-ring between the 2 halves to help seal it.
Is liquid, how does it stay in the diff and there was no cover or anything. Make sure thats not the gearbox you're looking in.;) Where the pinion gear is exposed to the ring gear.:D

[spowell940]

You are probably right. I need to check the manual and be sure. Then get some diff fluid and get that fixed up. I've noticed different weights for front/center/rear. What am I trying to do? Make it act more or less of a differential?

[Vmax911]

I beleive the oil is supposed to prevent the differential from unloading too much when one side looses traction. So I guess it does kind of control transient differential action, if that makes any sense to you. :)

Diff oil that it too thick will make the car very loose, while too thin of diff oil can cause the car to waste power while going over the rough stuff. This is all relative to the track conditions.

Hope this helps.

[Lost Racer1]

Good description Vmax :D

[spowell940]

Thanks Vmax,

Does the silicone lubricate? I thought I saw somewhere that it didn't. If not, what to I lubricate with? Then just put the silicone in on top of it? Obviously I'm a total newbie.

[RCNitrodude]

Yes, the silicone does lubricate the diff, all you need to do is fill the diff with the desired fluid weight, and you are done, no other lubrication is required.

[Vmax911]

Before you fill the diff it's best to wipe out all the thick factory grease, then all you need is silicone.

[spowell940]

Agains thanks. Now I just need to find the time.

[Kevbo6204]

Hey guys i wanted just to ask if this is a good deal? I mean since u guys live by these vehicles.:D

Alrighty...Its Ofna Ultra Gt with a an Os RG with about 10 runs on it....an extra chassis...two sets of shocks (the normal blues and then some ultra heavy duty ones with gold shafts)....no servos...starter box included..car has allot of unopened parts too...8 tires and body included.....all for 400$

Well i'll need to get a new body for it though....Will a Crowd Pleazer for a MBX4 work from proline?
What bodies will fit?

Thanx,
Kevin

[RCNitrodude]

If the buggy itself is in good condition, and the engine has not been run overly hard in those 10 runs, with the starter box, and the other extras included, then yes, it is a good deal.

[OldskoolGT]

Kevin,

You can get a new Ofna Ultra GT LX RTR for $350 at Ace Hobbies. Or a new H7 or 9.5 RTR for around $450, which are much nicer buggies.

[morfracerX]

No way in my right mind would i payt $400 for a GTLDX with an RG, i saw a R2 on e-bay with a 01 and another one with a s7 rtr for $400.

[Kevbo6204]

The car has full Mip CVD's including center drive shafts, it has a metal main gear, it it also has 2 full sets of shocks (the stock blue and Ultra shocks with gold shafts), 2 chassis as well, it comes with a starter box and battery too.

-Kevin

[1Nice_GT]

Hey, I wanted to get a 1/8th scale buggy, but i'm looking, whats a good buggy? i was looking at the Hyper 7 RTR, and the Ultra GTLX RTR, any suggestions? Thanks

[RCNitrodude]

Both are good buggies, the GTLX is a good one to start out with, or, along those lines, the Ultra MBX RTR, or the MBX R2 Plus RTR would be better yet, but, if you have the money, then the Hyper 7 is the way to go. If you can wait a couple of weeks for the 9.5 rtr, that would be my suggestion. But, IMO, any of the OFNA buggies would be a good buy.

[littlej72]

I finally got my ultra MBX R2 up and running. I have a JR XR3, OS21 RZ-01b, stock pipe&header, tower hobbies ts 71 steering servo, and a jr race servo for the throttle. I really havn't put much time into the car. I want to pull appart all the diffs and put some fluid in there, As well as the shocks(they seem super soft) So here goes....
1: what weight oil is good for this car on a dirt track(lotsa small jumps) (shock oil)
2:what should i put in the diffs(3000front,7000 center,3000 rear)hows that sound>?
3:what is a good tuned pipe for this motor on a medium sized track, and is the stock clutchbell ok? i think its a 14?
4:Where can i find a better spur gear for this clunker, that thin plastic one looks weaker than the one on my NTC3>?
5:Any suspension/car tuning tips for this particular car would be helpfull
6:What servo is every one running steering? and I know this sounds simple but as far as servo horns what does everyone use? thanks!
I have 5 other cars all onroad, the closest i came to off road was a t-maxx but it was too junky for me(broke every time i took it out) and overheated a lot. So I'm not a moron I'm just new to off road.

[eman88]

have you guys heard anything about the new ofna(hobao) dominator truck?
do you guys have any pics or any info about it?

[fezzy]

I have got lots of pics and lots of info but the majority of it is all here: http://www.steel-dragon.co.uk/ash/Dom-Preview.zip

[Lost Racer1]

Originally posted by littlej72
I finally got my ultra MBX R2 up and running. I have a JR XR3, OS21 RZ-01b, stock pipe&header, tower hobbies ts 71 steering servo, and a jr race servo for the throttle. I really havn't put much time into the car. I want to pull appart all the diffs and put some fluid in there, As well as the shocks(they seem super soft) So here goes....
1: what weight oil is good for this car on a dirt track(lotsa small jumps) (shock oil)
2:what should i put in the diffs(3000front,7000 center,3000 rear)hows that sound>?
3:what is a good tuned pipe for this motor on a medium sized track, and is the stock clutchbell ok? i think its a 14?
4:Where can i find a better spur gear for this clunker, that thin plastic one looks weaker than the one on my NTC3>?
5:Any suspension/car tuning tips for this particular car would be helpfull
6:What servo is every one running steering? and I know this sounds simple but as far as servo horns what does everyone use? thanks!
I have 5 other cars all onroad, the closest i came to off road was a t-maxx but it was too junky for me(broke every time i took it out) and overheated a lot. So I'm not a moron I'm just new to off road.

1. I say around the 40wt. range(with no big jumps you can have the suspension a little stiffer)
2. 3000-5000Front:7000-10000Center:1000-3000Rear
3. Pipe depends on what your looking for..Torque or topend. RB 063 for lowend or 086 for topend.
4. You should be able to get a steel spur gear at pretty much any hobby store that sells parts for your buggy..If you're looking on line you can try www.ace-hobbies.com
5. Suspension tips-Replace the shock pistons!
6. I run the Hitec 5945 for my steering. Great speed and torque. Irun a stock Airtronics on my throttle..I ran out of money. :)

Hope this helped a little..

[customnitro]

Ok, I have a chance at getting an ultra gtlx with a few extras for $250 - this will be my first 1/8 buggy. Is this a good deal?? It hasn't even seen half a gallon through it yet. I've seen the pro's and con's on this ride and it seems that 3/4 of the guys like it, and 1/4 don't like it. If I do go with it, who makes the better aftermarket parts for this beast? I would like to find a lsd for the center diff, and work out from there.



thanks,

cn

[Lost Racer1]

Ofna pretty much covers the aftermarket for their products..They do have a center Torsen for hat buggy..Sounds like a good deal.. Replacement parts are still in productions so you're good there. Is it rtr at that price?

[customnitro]

yes it is a rtr...

[eman88]

that sounds like a good price for the gt lx.
fezzy- thanks for the pics of the magazine article. I think that article was amonth after my subscription to rcca ended!

[2_much]

Originally quoted by littlej72:
I finally got my ultra MBX R2 up and running. I have a JR XR3, OS21 RZ-01b, stock pipe&header, tower hobbies ts 71 steering servo, and a jr race servo for the throttle. I really havn't put much time into the car. I want to pull appart all the diffs and put some fluid in there, As well as the shocks(they seem super soft) So here goes....
1: what weight oil is good for this car on a dirt track(lotsa small jumps) (shock oil)
2:what should i put in the diffs(3000front,7000 center,3000 rear)hows that sound>?
3:what is a good tuned pipe for this motor on a medium sized track, and is the stock clutchbell ok? i think its a 14?
4:Where can i find a better spur gear for this clunker, that thin plastic one looks weaker than the one on my NTC3>?
5:Any suspension/car tuning tips for this particular car would be helpfull
6:What servo is every one running steering? and I know this sounds simple but as far as servo horns what does everyone use? thanks!
I have 5 other cars all onroad, the closest i came to off road was a t-maxx but it was too junky for me(broke every time i took it out) and overheated a lot. So I'm not a moron I'm just new to off road.

1. Its not really the oil you need to change, its the springs. If you have 50wt oil and stiffer springs than stock, you should be fine.
2.F- 7000, C- 10000, R- 3000. That should be good for all conditions.
3.It really depends on what you want. Do you want low end torque, or high end buzz? For a medium track I'd lean more towards low end, so go with an OFNA one-piece tuned pipe.
4. I don't know where you bought your R2 from, but mine came with a hardend-steel spur gear. Check again.
5. I'm not helpful, so I'm not going to answer this question.;)
6. I'm running a Hitec HG-5735MG. With 264 oz of torque, I sometimes think it has too much torque, but that is my name.:rolleyes: :D

Glad to be of service.
(Man that took too long.)

[jfsocal]

Hey everyone im new to this BBS and have a few questions. I recently picked up a worlds 2 and was looking to get some rear cvds for it and hopefully later on if one is available add a 2 speed tranny for it. Ive seen a few posts from people that have worlds 2 and was hoping to find out where to get these kinds of hop ups for it. Right now im waiting on my starter so it hasnt ran yet but the guy i bought it from said it rips


The car has an RB Concepts S7 motor with 3 tanks ran through it. Hitec FM radio with Hitec HS servos. stock rim with stock tires another set of stock rims with proline pin tires. I cant wait to see this bad boy rip.

Thanks for any future advice you guys give me

[jcnmt]

hey i might be getting an ofna worlds 2!please let me know how it is.i also want to know if it is ROAR leagal thanks!

[jcnmt]

also how much would diff gears and a bulkhead cost?:D

[MightyTaco]

100k JPG (http://www.acsu.buffalo.edu/~jfroth/w2setup800.jpg)

900k PDF (http://www.acsu.buffalo.edu/~jfroth/w2setup800.jpg)

I took the setup sheet for the 9.5 off of www.tw8.ws, and modified it for a Worlds 2 buggy.

[Vmax911]

Hey guys, any tips on getting more low speed steering?
I have an MBX front end (pivot ball type). We have a pretty technical twisty part on our local track. Most the buggies seem to be running a tighter line through that area than I can.

Right now I'm running about 2 degrees negative camber and about 1 or 2 degrees of toe in up front.

[MightyTaco]

A little lower front ride height or higher rear may help ya out a bit.

[-=ADA$=-]

firstly i would like to appologise, that i didnt read all post but i found it out just jesterday, so i wasnt able to read the, and maybe it was asked befor, what shoul i look out when buying mbx r2, is it good buggy for price, and what about ofna delta force, is this good engine, and would it fit into mbx?? how is with durability, i would liket o know most important things about that car, so pleas feel free to help me:D

[enzo631]

I'm thinking of getting into the 1/8 buggy scene and I wanted to know what the difference is between the hyper 7 pro and the pro-r. Can someone please elaborate on this for me. Thanks.

[Dirt Racer]

Vmax - You may also want to try alittle toe out and move the bottom of your front shocksto the out side hole.

Hope it helps!

[eman88]

what holes do you guys recommend i mount my shocks to on my gt lx?
should i mount the shocks higher on the shocktower?
also should i mount them closer to the center of the buggy on the arms, or farther out.
This will just be for all around bashing and getting big air.
i think i will go with 80 weight oil because the stock pistons arent very good

[Jace2000]

Guys, I've been hearing only good stuff about the new crops of 9.5 pro.
I'm this close to getting it but that body is ooh! ooh! ugly! :D
Have any of you guys tried to fit another body besides the stock on the 9.5?
I would really love to slap on the new Trinity body or the Crowd Pleazer.

Also, I've read in the RC Nitro that the diff housing is made of aluminum.
Is this true?

Any info. would be highly appreciated~.

[gman123]

i have a ofna mbx and i was wondering how long are the moters suposed to last

[RCNitrodude]

Well, as long as you do not run the engine too lean, or without the air filter, and use after run when you are finished each time you run the buggy, the engine should last you a while. The P4 is a decent engine, very durable under normal conditions.

[coyote660]

gman...p4's are durable but the pull starters aren't...have fun:mad:

[RCNitrodude]

Yeah, what he said...that too. Starterbox is the way to go.

[coyote660]

RCNdude...i wish the'yd come up with some better spring steel...starter boxes =land anchor.

[gman123]

thanx man.

[Allen T]

Hey guys,

I'm fairly new to R/C (I have a TC3 RTR Electric), and want to go nitro.....I really like the 1/8 Ofna buggies.

If anyone has info on the Ultra MBX RTR (good or bad) I'd like to ask some questions: (yeah, more than one!)

I've heard the Ofna engines are "tempermental" during break-in. Has anyone had (major) problems?

Are they durable? I'm not going to race (or abuse) anything, I'd just like to have a good car to learn with.....I don't want something thats going to eat up drive parts!

I've seen stuff about needing endpoint adjustment, etc on nitro cars. Is the included Airtronics radio OK for "goofing around"?

Mainly, I'd just like to get some advice, and buy a decent nitro RTR.

BTW-the GS Storm RTR is out of my price range! I'm looking at "Nitrohouse". The price for the Ofna is $360.00. If anyone knows of a better price, lemme know! I need to order online or by phone, as I'm stationed in Germany.

Thanks!

Allen

[MightyTaco]

Hey man, if you send me some things for my 91 golf that i cant get here in the states, ill tell you all you want! :D

As far as durability goes, the only items ive ever had on both my ofna (ob4 and buggies)that gave me problems were the diffs. I dont know how it is with the rtr's, but if i were ever to buy one id take it apart and make sure its perfectly shimmed so that it is as smooth as possible! Otherwise, ive raced my W2 all season so far with the only problems being screws coming loose i never loc-tighted! Oh if you havent already, check www.ace-hobbies.com for good deals. Thats where i usually get my stuff!

Good luck man.

[Tujay]

Does anybody know if the Ultra Worlds II body fits on the Ultra GT LX buggy? I love that body, but I see no reason to go and buy another buggy just because I like the body.

[Vmax911]

I'm sure you could make it fit, you may have to put the mounting holes in a different place. I have an MBX, and recently put a worlds I chassis on it. The difference is that the Words chassis has front kickup, which actually made the car about 1/4 inch shorter, so i had to elongate the mounting holes.

[-=ADA$=-]

hey mighty, what generation of golf is it?? here in poland its very popular car, and some are well tunned, PS forgot to ask does H7P, or 9,5 parts fit, or replace some parts in MBX R2?? i would buy 9,5 now but i have slight cash problem

[MightyTaco]

Its a second gen golf. I had an 83 GTI and a 90 before this one. Loved em all!

I think the 9.5 wing will fit on the MBX... :)

[coyote660]

sure it will...ya just drill it:confused:

[RCNitrodude]

Yes, the body does fit, my Worlds 2 body fit on an old MBX chasis without any problem, but as mentioned in previous postings, make sure to align the holes before drilling.

[RCNitrodude]

And on another note, I sent the last post before I wa finished. I need to upgrade my radio gear, I'm tired of the glitching from the AM stuff...does anyone have any reccomendations on either the M8, or the Hitech Lynx 3d? It's a toss up right now which radio, and would like some feedback on each if possible.

[Lost Racer1]

My reccomendation would be to hold them or maybe try them out if poossible before making your decision. I''ve had JR's XR3, the M8, and now own an R1. I would've gotten the Hitec, but I didn't like the way it felt in my hand. It has every option possible to man ;) But it wasn't comfortable for me. So my recommendation is to go with whats comfortable for you. And if the hitec is, then I'd say go with that w/ the spectrum module. :)

[RCNitrodude]

I ended up going with the JR XR3, it had the features I wanted, and a price that beat the M8, and did feel pretty good in my hand at that.

[gman123]

what about the hyper .21

[gman123]

what about the hyper .21:confused:

[coyote660]

what about the hyper .21??:confused:

[RCNitrodude]

What about the Hyper .21? It rips!

[gman123]

does eneybody know if thair's a better pullstart I could fit on the p4

[eman88]

whats wrong with the p4 pullstart. i think it is pretty well built. i had one break, but that is because my dad yanked it too far out and broke the spring. i could rebend the center of the spring and fix it. so really i havent had any break after a gallon and a half. 1 gallon on one p4 and another half on another p4

[coyote660]

no substitutes i can find...i've been through 3 (multiple gallons)...i'm not flooded...not trying to compress liquid and i don't pull the rope out too far...they always break at the same hard bend in the spring...poor steel or design?...just the nature of the beast.

[RCNitrodude]

The springs were probably not properly tempered after they were bent, that makes them brittle, and causes the easy breakages. I have not had any problems with the springs, just the cords.

[coyote660]

that's cool....i've never busted a cord

[gman123]

ya i've never had a cord break just every one in awhile the stuped spring would pop out:(

[spowell940]

Most every place I look I see suggestions upgrading the stock steering servo. What are some suggestions? Looking to spend $50-$75 so I don't need the worlds best.

[coyote660]

hitec...HS-625MG

[Hotliner]

Hey a hobby shop somewhat close to me finally opened a track (not many in the north east it seems) And I would like to get into 1/8 buggies and race, what do you guys think about the Ultra Worlds 2 for a first race machine? I have plenty of nitro experience BTW, I have just never raced.

Thanks
Scott

[RCNitrodude]

The Worlds 2 as a first race buggy, excellent choice, I just got home from the track, finally got to get in some real track time run with mine, it handled great, took the turns well, it was a rush. I have no complaints about my W2, and recomend it to anyone who wants a good 1/8 scale buggy to start out with.

[Uptonw567]

When i got my buggy it was nothing but a backyard basher, it had beat up body, old tires, stock engine stock exaust, basically nothign radio gearand stock springs and shocks, well i went out and spent 400 dollars and got some good radio gear and a really sweet Rex one piece exaust(best sound ever) ok well i got bak and i started to go racing well i wasnt doing to good it just didnt ahve the power i need and the suspensinon it needed, ok well i got a really cool body black with orange flames(sweet), it is starting to look like a racer just doesnt have it yet, ok well i went out to start it up and tune it alittle bit but to my surprise the engine locked up and would not move, most ppl would be alittle mad and start tearing stuff apart but nooo NOT ME, i went to my lhs, and i wanted a new engine, and i didnt wanna spend alot of money so they said just to get the os ,21 rg i said ok, and well its here could u set my shock and could u put some mugen pistons in the shocks and new springs so it sits good, they said ok, well i go home, and i go the os website and i look at the power out put for my engine and it is only 1.9 THATS NOT ENOUGHT TO COMPETE, so i call up and i say i want a nova rossi but i didnt know which one, well i ended up getting the Nova rossi ,21 clb crono verison, and why it was up there i had them put brand new crime fighter tires on it(the tires i had were way way too wide) with blue kyosho wheels, i went up to my lhs today becaue my friend is getting the kyosho inferno, well i tell them i wanna see my buggy, it didnt have the shock and and springs but with the tires and wheels and the engine its looks really really sweet,i go up there tonight to pick it up, I CANT WAIT TO SEE IT, next friday is going to be my first race, me and this guy from the track(the best driver and tuner up there) is going to break in my engine so i should be ready!!!!!!! so i will get pics and stuff as soon as i get it done
Landan
by the way it is ofna ultra worlds 2

[-=ADA$=-]

all i can say, good luck and hope youll do well, and most of all have lot of fun

[MightyTaco]

Dont let the numbers fool ya. The rg is a good motor. I ran one in competition for almost a full season. That thing has many many gallons thought it, and very little compression left, but it still runs like a top and will idle all day! I now have a picco omega in my w2 though... All i can say is. FAST! :) Fuel efficient as well.

[Uptonw567]

hey yea i will have alot of fun surprising everbody out there lol, but rg does have good power but i need more power, the nova is sweet i know some ppl out there that have it and the FLY!!! its crazy so i cant wait till i get out there but i do know sombody that has the rg and it does fun good
Landan
but i cant wait to get out there because they think i will have the same ghetto buggy but no it will look like the, oh yea my friend just got his infenero and he is pissed because he just spend 600 dollars to get it to run and he got that rg and i am going to out run him lol

[MightyTaco]

haha, lay down the whoop arse. :)

[Uptonw567]

oh hell yea
Landan

[Uptonw567]

hey i just wanted to let u know this wont be my FIRST RACE ever it will be my first race with all my stuff on it
Landan

[nitronate]

does anyone have an buggy they would sell me. Im lookin for somethin old like a practice or a backup. Im new at 1/8th buggys and want one to rac lacally. Can upgrade later just lookin for somethin cheap

[-=ADA$=-]

hallo BRO im in same position, i have gathered almost $200 and want 1/8 buggy very bad, so i found ofna mbx r2, without engine or radio equipement, so ill have to get another $200 or more for engine ( cause i have radio already, and second in the way) so tell me what youll find, hope youll succeed

[nitronate]

ya i think i am buying this mugen rr for 325. Then ill get a radio and a motor and itll be ready to ride!!

[Tha SmokaH]

Is this a good chocie ..?Ofna Ultra MBX R2 RTR Picco..was wondering if this is a good buggy..how fast and how does it handle...been looking in to geting one...or any tips on a better one..thx

[Crashbot2001]

Hello Everyone.

I've purchased an MBX R2 kit from ace.

Should be here Thursday. I can't wait. In the mean time i've been reading the previous 50 or so pages of posts, trying to pick up what I can from it.

Unfortunately, it will be a little while before I can run it. I just got married and the wallet is a bit too thin for a new engine right now. Fortunately, I'm already set on radio gear, save the steering servo. The only decent servo I have now is a hitec MG625 but it has serious centering issues. I'll not buy another Hitec servo.. Ever.. lol

Anyway, wanted to say hello and to tell you guys to keep posting so I'll have some stuff to read until I can get an engine!! hehe

Crash

[-=ADA$=-]

well man good luck in marrige and with your buggy, and pleas tell me what you feel when it will arrive, first though after opening the box, cause i want to get this buggy, but my wallet is also empty, not becasue i got married but im student, so i dont have enaugh money for what i would like to get, but i think that mbx r2 will be just fine

[Uptonw567]

hey crash, u will injoy your buggy alot, its ten times funnier than your rustler, and when u plan on getting a engine either go with the os .21 rg its 140 and my lhs but i dont know how much at yours, or u can get the nova rossi clb crono verison which i just got on my buggy,259$ at my lhs, and also i was talking to my lhs and they said that the pistons in the shocks for ofna isnt that good so i would recommend u getting the mugen, it sets alot better and u notice it handles better, and for a pipe get the REX one piece pipe its bad butt, great sound and alot of low to mid range power, but hope i help alittle have fun
Landan

[-=ADA$=-]

hole mugen shocks or just pistons, what would be better, i heard also that kyosho shocks work well, and what would be price of shocks and rex pipe??thanks

[Uptonw567]

its just the mugen pistons, and the price of the pistons and and mugen springs was 50 dollars, and the pipe i got it for 90 dollars
Landan
Yea the kyosho shocks are good but the mugen is alittle better, my buggy sits and looks like it is brand new, i will get pics of it so u can take alook,

[-=ADA$=-]

and where to get these pistons, and pipe, i looked on tower, stormer, horizon, ace and didnt found rex pipe, also are these some universal pistons, or some specific, thanks very much for help, as quick as my father will get bill on his visa ill get this buggy, and probably, pistons springs, and pipe, and later .21rg, thanks once again

[Uptonw567]

hey go to www.novarossi.com then go to Rex line and u will see the pipe, when i get my buggy back i will tell u the model, but i am not sure what time of the pistons they are, but that .21 rg is a great motor it has alot of torqe to mid range, the power out put on the .21 rg is 1.9 but it still has alot of power, but if u wanna spend more money and get alot more performance get the Nova rossi .21 clb crono verison its 230 and its worth it, but when u get that stuff i will help tune with the pipe and stuff like that but the biggest differece looking wise will be the pistons in the shocks it sits sooo much better
Landan
any questions email at
landanupton@hotmail.com
AIM SmirnoffIce692

[Uptonw567]

hey crash sorry the clb crono is 230$
Landan

[Uptonw567]

hey here is what is says about the exaust Art. 9853 -
This is the best choice for off/road competitions. Used by the most popular 1/8 scale buggy champions due to the low-medium range high torque power. In connection with the in-line manifold it gives the best performance and reliability.



hey if u want a pic of it email me
landanupton@hotmail.com

[-=ADA$=-]

well i have recently ( last week) sprained my ankle, so i hope to get some money from insurance, and i have some my own money so i pray it will last for that engine, how much hp does it have is it some killer engine, i dont plan to race, but if i would have such an engine, i would have to :D, thanks for all help

[Uptonw567]

which engine, the os has 1.9 its a good engine for racing and for bashing, the one i got the nova rossi clb crono verison is 2.2 hp and its race engines its bad butt, alot of torqe alot of mid range and alot of top end, then u step up one to the just the nova rossi clb and its 2.10 hp and thing is baaaaaaddd to the bone, but what u r going to be doing i would just get the Os rg or if u want alot of power for alot of money but not that much get the nova crono,
Landan

[Uptonw567]

hey and if u end up racing i would get crime fighter tires, its a really good race tire all around, thats what i got and they are sweet, and on my Nova rossi i got a peformance fly wheel and clutch so u might wanna consider those to
Landan

[Crashbot2001]

Well, I guess I need to start getting educated on .21 engines. I know the .12s just fine and I'm a true OS man there..

I am a bit shy about the NovaRossis as They just seem to be a bit exotic and I would hate to fry a beautiful Italian Engine.. lol

I was considering the following...

My buddy has a RB 7 Europa(?) is that right? 200 bucks even from a hobby shop in WV(phone order)

Collari Picco XS3200 $209 from Ace

Collari Picco XS2200 $289 From Ace(a Little more than I wanna spend though)

OFNA Force Delta $179 form Ace(this one really has my eye for that price)

Please give me any comments, good or bad on these choices, or suggest others. If you suggest something else entirely, gimme the full name and model or a link cause I won't recognize it otherwise. As I said, I'm un-educated in the field of .21s.

Thanks!

[Uptonw567]

hey crash do u plan on racing or just bashing if bashing and alittle bit of racing get the Os .21 rg not sure ont the price from tower but at my local hobby store 149 99
another good engine(what i have) is the Nova rosii clbcrono and its putting out 2.2lots and lots of power, and great torqe, and at my lhs its 249 99 or somewhere around there Ok or u can step up and get the strait nova rossi clb puttin 2.10, i have seen them run and its crazy how fast they are off the line and mid range, and that nova is a great engine alot of guys out at my lhs run the nova and they say its a great engine barely if at all have problems with them at all, so thats why i got mine but w/e u wanna do, but i have heard those piccos are a pain in the butt
Landan

[Crashbot2001]

Upton, I wanna race it.. I am attempting to Race my XXXNT and I'm getting prety good at our brand new local track

I've heard the same about Piccos Hard to keep tuned..

The Ofna Force Delta claims 2.45 Hp. that's hard to believe for 180 buckets

Anyone here have one?

[Uptonw567]

yea the is probably not true its hard to get a .21 with that much power, but if i were u get the os .21 rg or the crono verison nova
Landan
Hope this helps alittle

[Uptonw567]

if i were u i would get the Nova rossi thats what alot of ppl run at my track that and os .21 but the nova u just cant compare with it
landan

[RCNitrodude]

Actually, the Ofna Force Delta engine can put out that much power, it is an 8 port engine, and it's that inexspensive, their prices are lower than O.S. and Nova Rossi, due to the fact that you are not paying for a premium name.

[maddog0559]

Can any one tell me what an ultra world in very good condision is worth, I may be able to get one with an OS21 rb engine for about $350. I think this includes a radio and servos. Thanks

maddog

[chanes9]

i just got my buggy all together and i have a .21p4 and alumminum threaded shocks all of it is alumminum, i need some sort of hop ups that will give more speed and power but i dont have much to spend im only 13 so if u have any cheap ideas or wanna give me some stuff let me know!

[-=ADA$=-]

well just look up /\ ofna delta force, more powerfull, and can reach higher RPM's

[Crashbot2001]

Anyone here have one or had one previously? (Delta)

I'm getting more and more dedicated to this engine but I would like to hear from someone who has actually run one.

nitrohouse has it for 159! That's a good price if the engine is good.

Thanks
Crash

[-=ADA$=-]

is it pull start??

[Crashbot2001]

no, it's not pull start.

[KevanB]

Hey willa hyper 7 be good for me? Im just going to bash right away, and then start racing later.

[-=ADA$=-]

well sounds good to me, i will just have to buy starter box also, but first i want my mbx :)

[Uptonw567]

hey, ok i have never had a delta force but a .21 engine only 159 i am i saying that is basically like a megatech, it makes u wanna buy it because its cheap and they "claim" that its really powerfull, but the reasons the nova rossi and OS are brand names is because they live up to what they say,
Landan
but a cheap hop up for your buggy would be fly wheel and clutch and if u have 100 dollars exaust

[Uptonw567]

Ok well i went to break in the new engine right, well the engine is doing just fine, well he was driving it around and it like stoped but the front wheels are turing just fine, well he goes over there and turns the rear wheel and then starts driving well is the rear diff gear set, ok well we take it down stairs and take it apart and he was right there was gear stripped well now i cant go racing friday so that sucks, OH YEA the big questionDoes any body have a rear gear diff set for the ofna utlra worlds to or do u know where i can buy one??
lmk ASAP
Landan
landanupton@hotmail.com

[RCNitrodude]

Your local hobby shop will be able to order the parts for you.

[Vmax911]

There's been a lot of that stuff on E-bay recently.

[Uptonw567]

OK cool i found it on tower
Landan
so now i can maybe have them sent it one day air mail and get it in and race friday

[Crashbot2001]

Oh man, Just checked UPS tracking and my Buggy is in town, on the truck, and out for delivery. I told my wife to listen for the doorbell..

lol

Sorry guys.. I get pretty excited about new RCs