Twin engine T-maxx that is supercharged !!!!!!!! with pics!!!! [Archive]

Freak e-maxx1

10-23-2003, 09:09 AM

i didnt biuld one of these so dont ask me questions about it heres a link of the truck

http://www.webshots.com/search/search.fcgi?words=t+maxx&noRedir=1&page=0

Maxxcrazy

10-23-2003, 02:45 PM

lol...

howielong

10-23-2003, 02:52 PM

dude that is so sweet

Frapechino

10-23-2003, 02:54 PM

I've seen that its sick!!!!!!:eek: :eek:

its on traxxas also....:)

Freak e-maxx1

10-23-2003, 08:35 PM

i want one!!!!!!!

Freak e-maxx1

10-23-2003, 11:03 PM

post coments if u like:D

skater4life89

10-24-2003, 12:14 AM

whoa dats really cool hahaha

379

10-24-2003, 01:22 AM

that thing must be a pain in the ass to tune

2 F45T 4 U

10-24-2003, 04:41 AM

Ive heard that super chargers dont really show any improvements to power.

MrHorspwer

10-24-2003, 07:43 AM

IBitsnotrealandyoucantusesuperchargersona2stroke

Rokshumani

10-24-2003, 09:16 AM

I agree, these motors don't lend well to supercharging. They don't have enough time to build pressure etc. in the combustion chamber, plus a lot of the combustion takes place in the pipe. RC superchargers are a novelty for looks and that is pretty much it.....I think....
:D

BoardSlapper

10-24-2003, 04:31 PM

I have seen supercharging on motorcycles and snowmobiles, and they work sweet. But you are just going to lose most of the extra gas unless you have a properly tuned pipe. And frankly, I don't think any pipes in the RC industry are tuned very well at all.

Rokshumani

10-24-2003, 04:52 PM

:D

I didn't say it couldn't work....just said that they don't work very well on RC...I too have seen supercharged motorcycles (although the ones I have seen are 4 stroke). I agree on the pipe situation, and that you are going to lose any sort of power gained because of it.

RC doesn't need forced induction, if you want more power it is almost as cheap just to buy a better more powerful motor....

Just my 2 cents...

379

10-24-2003, 05:21 PM

the superchargers would make a nice place to mount an alternater/generator so as long as the engine is running it is charging the rx pack that way u would never half to worry about the rx running out of power as long as the engine stays running

but what if u put the supercharger on the better motor

BoardSlapper

10-24-2003, 05:37 PM

You know what this could work, if you had a small voltage regulator, and just a tiny little generator (slot car motor?). It wouldn't take much at all to keep a reciever pack going.

379

10-24-2003, 05:50 PM

yeah it would pretty much destroy any chance of a runaway as long as it is maintained and would add to the realism real cars have alternators why cant rc cars have them but it must be able to withstand the 40,000rpm .21 engines they might be installed on it would also work on the aa pack as long as the aa batterys are a rechargeable type ive got some nimh batts in my rx battery holder a slot car motor would be a perfect alternator if geared 1 turn of the crankshaft pulley to 1 turn alternater rotor

Freak e-maxx1

10-24-2003, 06:34 PM

thats a great idea any one going to build one?

379

10-25-2003, 03:24 AM

does anyone know what the inside of a 1:1 alternater looks like?

2 F45T 4 U

10-25-2003, 05:48 AM

i think its the same as an electric motor, if u spin certain electrc motors by hand u can get voltage out of them, for some reason it doesnt always werk.

379

10-25-2003, 05:56 AM

yeah i took an old dc n-scale locomotive motor with brass flywheels on it and the led head light and sure enuff when power is cut the light stays on untill the motor stops and dims proportionate to the motor rpm when power is cut the flywheels keep it spinning for around 2sec that is enuff time to note the effect and by cut i mean ripped out of the wall so the only power for the light when power was cut was coming from the motor all we need is a ajustable voltage regulater and voila an alternator

when u said certain electric motors did u mean dc motors like those in the rc10b4 and 90% of tamiya kits i dont know about ac motors but i would think they would give off ac current we want a dc current coming from the alternator dont we

2 F45T 4 U

10-25-2003, 08:53 AM

well i attached my lego motors (big kid see:p ) to a light and spun them it lit the light up but i attache sum motors i ripped out of old toys to a drill and it would not light the light.

379

10-25-2003, 02:36 PM

u probably didnt give the other motors enuff rpm to light the light when i spin the trian motor by hand it wont generate anything but the spin up/cut the power method gave it enuff rpms to do some generating

i have legos too

big1s

10-25-2003, 04:20 PM

LEGOS ARE COOL :cool:

Skribble

10-26-2003, 12:42 PM

It's okay.

fastharry

10-26-2003, 01:06 PM

all that work....and he puts on the wrong aircleaners.....

hope he does't run it much..

Avalanche

10-26-2003, 01:18 PM

Originally posted by BoardSlapper
I have seen supercharging on motorcycles and snowmobiles, and they work sweet. But you are just going to lose most of the extra gas unless you have a properly tuned pipe. And frankly, I don't think any pipes in the RC industry are tuned very well at all.

Motorcycles and snowmobiles use reed valves that help hold pressure in the intake tract. RC engines do not use that technology and any pressure will be blown out of the exhaust pipe. Supercharging an RC enigne doesnt do anything that leaning the high end needle does'nt do. Iys just a fancy new way to seperate you from your money.

atm92484_3

10-26-2003, 08:16 PM

Man that truck is the poster-child for what can happen when a noob has $3000....

Freak e-maxx1

10-26-2003, 08:39 PM

lol i wish i had that much money for a truck

BoardSlapper

10-27-2003, 09:44 AM

Originally posted by Avalanche
Motorcycles and snowmobiles use reed valves that help hold pressure in the intake tract. RC engines do not use that technology and any pressure will be blown out of the exhaust pipe. Supercharging an RC enigne doesnt do anything that leaning the high end needle does'nt do. Iys just a fancy new way to seperate you from your money.

Avalanche, this doesn't make any sense. Yes they use reed valves, but that is just for intake valving. In the case of R/C engines, the slot in the crank does the intake valving. As for holding the fresh gasses into the engine, that is done by backpressure pulses created by the tuned pipe.

But I do agree, that the chances of this thing making any beneficial horsepower is very slim. I think the biggest horsepower improvement we could see in r/c engines would be properly tuned pipes, with included header at exact length.

Avalanche

10-27-2003, 10:27 AM

If you look at the timing in a RC engine, on the intake stroke the exhaust and bypass ports are all open at the same time for a short time. The reason a supercharger produces HP gains in regular engines is that it force feeds air into an engine under pressure which packs more fuel and air mixture into the combustion chamber. I'm of the opinion it would be impossible to create positive pressure on the intake stroke of an RC engine. As the crank spins and closes the intake and ehaust ports and starts to compress the intake mixture, it also closes off the intake tract so what you are left with is the static pressure in the crankcase, and a lot of air blown out of the exhaust pipe, which also kills the benefit of scavenging unburnt fuel from the tuned pipe. The net result is a leaner mixture but no pressure. I dont think I'm wrong, but I'm of the opinion those RC "superchargers" are a complete scam, and only good for eye candy.

Freak e-maxx1

10-27-2003, 08:49 PM

can u just add more fuel into the supercharger or make a air filter that sucks fuel in and it sprays a mist or u can use a pump for this is it posabale?

379

10-27-2003, 09:03 PM

put the carb on the super charger air intake

i think we were closer to making an alternator that generates charging power than a sucsessful 2stroke supercharging

Freak e-maxx1

10-27-2003, 09:07 PM

is any one makeing one?

379

10-28-2003, 02:53 AM

we need 3 things a spare engine we dont care if we screw up a voltage regulator and a universal rate at which the only batteries this would mess up r alkalines the crank pulley would come from that supercharger kit if available separate

Interstate

10-28-2003, 08:10 PM

IF super- or turbo-chargers were to work, the proportional values must be noted:
Supercharge a Corvette engine (that's 500hp) and get 100-200hp (forgive me if these numbers are wrong) That's about a 20% inrease
Now let's take an Italian engine with 1hp (for numbers sake) with a full 20% added to that just like the Corvette, you'd get around (you guessed it) 1.20 horses. Who notices .2 horses?
Now we take the second part to the REAL world; taking in account for the different supercharging psi, engine reduction size, engineering flaws, (incorrect timing) different fuels and whatever else I can't think of you subtract power for each flaw. Just a guess here, but I think that'd come out to some .02 as opposed to .20 horses. After all that money and time spent on that super charger, you now have a 1.02hp engine.

Freak e-maxx1

10-28-2003, 08:17 PM

cant u just add like a little pump that sends a stream of fuel to the carb and have the carb get more air with a biger intake atachment that forces air in to it like ram air?

Interstate

10-28-2003, 09:23 PM

We do have a fuel pump, it's that tubing from the tuned pipe going to the gas tank... RC plane engines use a similar system to what you're thinking. They tap into the crankcase just below the sleeve and there is some dangle that monitors the pressure of the inside of the case and increases fuel pressure accordingly. This system often allows better performance for planes because of the altitude changes and other stuff i don't really know about, but would hinder performance for our car engines. you can see these at www.perrypumps.com

2 F45T 4 U

10-29-2003, 06:27 AM

could u fit one of them superchargers to a 4 stroke? like the os 40?

Freak e-maxx1

10-29-2003, 08:58 AM

say if u put one of those pumps in would it work? this week end in going to make my car go faster by puting a niddle fiting on the air fliter and have a t valve from the tank to the air filter

379

10-29-2003, 01:27 PM

it should be ready for supercharging its all in the engine a 4stroke has 1 stroke dedicated to intake u can cram much more fuel air mix in a 4stroke because of that a 2stroke combines the intake and exhaust strokes so u cant pack more fuel air mix in there it simply goes flying out the exhaust pipe leaving u with just as much power as u had be4

raderrustler

10-31-2003, 10:06 PM

Guys..give it a rest.
Do a search on turbo'ing and supercharging 2;stroke rc engines and you will see it is impossible due to design. Ports for intake and exhaust are open at same time..back pressure from pipe allows resistance to make pressure in the engine case and then ports become closed and combustion..basic 2-stroke theory.
Randy

379

10-31-2003, 10:12 PM

thats what i thot yeah lets give it a rest

ragamuffin

10-31-2003, 11:04 PM

Originally posted by Freak e-maxx1
say if u put one of those pumps in would it work? this week end in going to make my car go faster by puting a niddle fiting on the air fliter and have a t valve from the tank to the air filter

:confused: Can someone run this through a universal translator please?