Yet more Motors questions!

[Prinler]

Ok,
Im looking at my nice Ultima and i was thinking how i love how fast it goes for me.... but the other day i was at this website someone posted and was poking around the movie section. Traxas or duratrax or something bandit. In the movie it was hauling arss! and i belive it was all electric.! Makes me want to cry. To make my car go fast i understand that i need to Lower my motor turns... and Gear it larger to get more top end speed. (if im wrong let me know please all i need is to think i know what im talking about and being totally wrong LOL)

Im running a Le mans 360. This is my best motor i think i have so far. got a 240st, 600E and a shot east coast racing motor( was told was used for oval tracks) it says epic motors.

I guess what im asking for is a review .


P.S. I really want something that i can use on my buggy that will give me the high end speed i NEEEEED! heh ( you know what im saying )

[Prinler]

Anyone? come on now
:(

[sosidge]

Well those old Lemans motors will have no where near the power of a modern motor.

Is it a vintage ultima you are running, or a modern one?

If it's an old one, I wouldn't go much quicker than about 15-turns, if it's a modern one, perhaps a 12-turn would be ok.

With a nice 15-turn, sensibly geared, your ultima will haul more ass than a Traxxas or a Duratrax.

[Prinler]

a 15? WHOA..... how many turns do ya think my motor has? the thing is my old speed control might not handle a 20 turn or what not. I would love to have a 5 min run time but i barly get like seems like 30 secs but when i time it..... like 2 mins max!

Man it sux. I was thinking about buying a stock motor .... like a p2k2 or MVP but when i look. they are all 27 tunrs.
how does a p2k2 or mvp compair to a 20 turn motor?

Lemme know.

Ok im editing this.
vote now p2k2 or MVP
thanks

[Grizzbob]

I'd say P2K 2, they make just as much power as an MVP but they easily run considerably cooler. And while I can only guess about that older motor of yours, I doubt you'll be any slower with a good stock(& you might well be faster with one, just due to the likely condition of that old motor).....:)

[Prinler]

Yeah my motors are always cool when im done running... HeHe as well as my ESC but i want a new motor....
P2k 2 eh? you like those?

[Grizzbob]

Yeah, I've had LOTS of stock motors in my time, & for the moment, I think the MVP & P2K 2 are the most versatile ones of the bunch(but there are PLENTY of motors that can work well if set up & geared just right), & of those 2, the P2K 2 does run cooler & a bit more efficiently......:)

[Prinler]

Ok you brought up a good point..... Any motor can be good once set up right.


I Still dont get the gearing part. Maybe im just dence in the head but i look at it like a mountin bike... (pinion)the larger one in front the faster i will go, and the harder it is for me, and the gear in the back (spur) the larger i go the i slower it becomes also gets harder on me ( or the motor). But I ask you this. On my P2k 2 what is good gearing? right now i have a 13 16 and a 22 pinion and like a 44 spur. I have 3 buggies old ultimas. my favorite is the 13 pinion with the 44 spur seems to rip it up more when i am bashing, Has nice low-end and decent highend.. i lose the low-end totaly with other spurs.... the16 and 22 seem to be really slow. Am i missing something? For all the people who run P2K2's what gearing are you running? Fill me in if i sound crazy guys. Thanks
Stevep


Ok I JUST thought of something!!!! If i upgrade my pinion it would make sence to upgrade my spur. Oh man what is pitch now? BAH! So much to learn. Someone help me heh

[Grizzbob]

Well, since I have no idea what the old Ultima's gearbox outdrive ratio is, I'm not sure I can really recommend a gearing for it, but from the sound of it you must be using 32 pitch gears. Pitch refers to the size of the teeth, & it affects how many teeth can fit on a gear. Of the current gears, there's also 48 pitch(which is commonly used in offroad cars & a fair number of touring cars) & 64 pitch(which some will use in TC's but are mostly used in pan cars, for maximum efficiency). The higher the pitch, the smaller the teeth are & the more easily they can strip(which is why offroad cars use 48 pitch most often, they're noticably tougher than 64 pitch but are still quieter & more efficient than 32 pitch). Now, it is possible to end up with the same final gear ratio with most all the various pitches, though it might take awhile to do the math & figure out exactly which gears to use. As for your situation, you might try a ratio that's somewhere in the middle of your available gears(you can at least take the number of teeth on the spur & divide it by the number of teeth on the pinion, & among all the spurs & pinions you have go for a number somewhere in the middle of what range you have). Just remember, the smaller the ratio number, the more top speed you'll have & the slower the car will accelerate & the opposite is also true......:)

[RichieRich]

Prinler & Grizzbob - The internal drive ratio for the old Ultima is 3.03. You'll have to multiply your spur/pinion combo by 3.03 to get your final ratio.

The spur gear is very small and I'm pretty sure it has 41 teeth. I usually run a 14 tooth pinion with my stock motors. Unfortunately, with the 32 pitch gears, it's real tough to make fine ratio adjustments and you can't swap the spur gear. A 22 tooth pinion is way too much! You will burn out your motor with that ratio. I believe Robinson Racing made a 48 pitch conversion kit which would allow better ratio changes.

Those old LeMans motors should be taken apart and cleaned. They're vintage.

[Prinler]

Hey rich... i would love to chat with you about this in real time. I have SOOOOO many questions about my/our cars. I know you have bailed me out many times :) your da god o' de ultima's :)

E-mail me and maybe we can set up an Instant messager and a time. Please :)

Im going to post this in some other places but for everyone who dont know. BAtteries are imprtant to keep in top condition. I have only run used POS batteries and i figured my car sucked for other resons.... But this morning... i recived my 2 1500mah packs.. charged them to 15 mins. and OMFG! takes 20 secs for the tires to catch traction cause it hauls sooo much arse... and in dirt i have to make sure i dont pull to hard when im on soft soil like a flower bed cause i seem to dig huge holes with my tires LOL... Anyway thepoint of the story is: Keep your batteries in good shape.

Another note: Im running a 13 pinion on a 41 spur :) so close to you rich. lots of power... and this is with a lemans 250? or something. I payed a guy $5 for the shipping and he sent me 2 of those and one epic one. and these are mint motors. very tricked out with nice brushes and anodized screw heads :)

Would you use the same gear ratio for a p2k2 pro? or even a lower turn motor?

Later guys.
Steve

[RichieRich]

Prinler - Glad to be of some help. I also have some information on those LeMans motors if you need it. Anyways, I'm not really on the computer that much other than at work. I only have a Yahoo messenger handle which is in my profile. You could try and contact me there.

By the way, the reason why the Ultima takes off like a bat out of hell with a lot of wheelspin is because there were no slipper clutches in the late 80's.

[Prinler]

Im on now