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teknoraver -> ys (1/17/2005 1:52:09 AM)

Hey guys im new.
I was just wondering if any one here knows of how a turbo charger works and fits on to an rc car.

Thanks



kwong2001 -> RE: ys (1/17/2005 1:55:42 AM)

They dont' make a turbocharger for our r/c's. Besides any forced induction doesn't work. There was actually a thread that got locked about superchargers on 2 stroke and I pretty much proved it was just a fuel pump.



jandb917 -> RE: ys (1/17/2005 8:40:55 AM)

actually kwong there is a company that makes one but your right it is more like a novalty item kinda like un-needed junk or a wast of money and time due to the fact of the dynamics of a 2 stroke engine they are pretty much worthless to have

and to answer your question on how they work all the really do is force more air into the engine which in turn allows more fuel which = more power or so they say i think the only things that benifit from this technology is diesel engins and big (car) engines



kwong2001 -> RE: ys (1/17/2005 8:44:20 AM)

Well, any 4 stroke engine will benefit from it. I'd really like to see an OS FS26 with an MPAA supercharger. It'd get real interesting.

Who makes a turbocharger?



jandb917 -> RE: ys (1/17/2005 8:58:07 AM)

here ya go kwong

http://www.rbinnovations.com/catalog/index.php

Like i said i think they are just a waste of money, I mean someone was thinking when they designed this but i dont think you benifit enough out of it to make it worth while



kwong2001 -> RE: ys (1/17/2005 2:25:22 PM)

oh, that's a supercharger, not a turbocharger...and it's been out for a few years now.



cardriverx -> RE: ys (1/17/2005 11:01:52 PM)

a turbocharger would be even more useless b/c it uses exhaust gas which would create alot of back pressure, and u would have turbo lag[:'(]. but a super charger does create about .05hp and 5 oz/in of toque, as shown in rc driver. but it isent worth the money for shuch a little gain.



kwong2001 -> RE: ys (1/17/2005 11:40:49 PM)

I don't think a turbocharger would even work with out 2 stroke carb engines. Cuz our tanks rely on pressure from the exhaust to get fuel to the engine. I doubt you'd get the tank pressurized, so you'd have to have a fuel pump.

But anyways, it'd be a pain in the ass to design a turbo scaled to our size engines. And it'd be SOOO expensive no one would buy it.



T-MAN-iR -> RE: ys (1/18/2005 1:50:56 PM)

If you do a search, this topic has already been discussed. A quote from a previous post I made....

I you can get the December 2004, issue #12, of RC Driver, on page 148 to 151 talks about the MPPA Supercharger. This one is the electric Supercharger. This article shows an increase in HP, Torque and RPM all across the board. So you can supercharge a Nitro two-strock engine and get results. You get about a .076 HP gain with a 327 rpm gain. You get 1.5 torque increase with a 327 rpm gain. You do see an increase throughout the entire power curve, and a cleaner line with the supercharger than with out it. But the over all price ($159.99) to Hp gain, is really not worth it to me. I can us the extra $159.99 on up-graded parts, to strengthen and make my CEN CT4S lighter.



Josh222 -> RE: ys (1/18/2005 4:23:34 PM)

And for the price you could get your self a nice powerful engine[8|]



kwong2001 -> RE: ys (1/18/2005 5:07:10 PM)

quote:

ORIGINAL: T-MAN-iR

If you do a search, this topic has already been discussed. A quote from a previous post I made....

I you can get the December 2004, issue #12, of RC Driver, on page 148 to 151 talks about the MPPA Supercharger. This one is the electric Supercharger. This article shows an increase in HP, Torque and RPM all across the board. So you can supercharge a Nitro two-strock engine and get results. You get about a .076 HP gain with a 327 rpm gain. You get 1.5 torque increase with a 327 rpm gain. You do see an increase throughout the entire power curve, and a cleaner line with the supercharger than with out it. But the over all price ($159.99) to Hp gain, is really not worth it to me. I can us the extra $159.99 on up-graded parts, to strengthen and make my CEN CT4S lighter.


I hate to tell you, like I did before, it's nothing more than a fuel pump. I will not get into this heavily, but I can tell you if you look at the graph in the lower RPM, both supercharged and n/a engines are making the same amount of power. If it's getting more air and fuel, it would have been making more power. But the upper RPM is where there's any change. That's only because the n/a engine was more starving for fuel and leaning out....that's where the fuel pump i.e. "supercharger" comes in. Oh yeah, and that gain of .076hp is on a big block. You change the needles a 1/4 turn and you're now making or losing .076hp.

[image]http://www.rcnitrotalk.com/gallery/data/500/657657Graph2-med.jpg[/image]



T-MAN-iR -> RE: ys (1/23/2005 10:46:57 AM)

Regardless, there is more power through the curve and a much cleaner power curve with the supercharger than with out. I would agree that its really not worth spending $159.99 to buy the supercharger. All I am trying to do is prove that you can us a supercharger in a 2-stroke motor. It doesn't matter how much more power is gained by using the supercharger, its that you do see an increase in Horse Power, Torque, and RPM.

quote:

If it's getting more air and fuel, it would have been making more power. But the upper RPM is where there's any change. That's only because the n/a engine was more starving for fuel and leaning out....that's where the fuel pump i.e. "supercharger" comes in.

That is the whole purpose of having a supercharger, is too get more air into the motor to get more power. You are forcing more air into the intake/carburetor to make more power.

quote:

I hate to tell you, like I did before, it's nothing more than a fuel pump.

And how is this a fuel pump. The supercharge is pumping more air not fuel. It has nothing to do with fuel.

quote:

but I can tell you if you look at the graph in the lower RPM, both supercharged and n/a engines are making the same amount of power.

And how often are you going to be racing your car at that low of RPM. You will spend more time in the upper RPM range than in the lower RPM range. And look at the big drop in the middle of the NA range over the supercharge range. NA's power curve is not clean. There is a drop in the curve. The supercharger curve does not have any significant drop. The power curve is clean all the way through the power band.

All I am saying is the supercharger WORKS!!



kwong2001 -> RE: ys (1/23/2005 11:47:36 AM)

You just don't get it do you? It's not getting any more air or fuel at time of combustion. If it worked like it should have, there would have been a significant change in power throughout the ENTIRE powerband. There isn't any change in the low end, and as a matter of fact, it looks to be worse on the low end.

The only reason why the n/a has the drop is because it was starving for fuel, plain and simple. That's where the supercharger came into play. All it did was increase the pressure in the tank since all the air went out the exhaust port, giving more consistent mixtures throught the power band. How hard is this concept to understand?

I challenge you to find any 4 stroke dyno of before and after installation of a supercharger showing the low end the same as n/a and having only the top end improve.



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