Super Chargers

mgs9 · #1 09-11-2004, 02:09 PM

I was on this site and fond super chargers

for nitro engines. Dose any one know if there any good or do they work.

Whats the story on these no one has realy said any thing on them .
url http://www.rbinnovations.com/newsite/main/supercharger.htm
http://www.rbinnovations.com/newsite/products/RBK10530_544.htm
Do they work like your typical carbureted super charger.
And check these out what do they do how do they work?
http://www.rbinnovations.com/newsite/main/hypervalve1.htm

mgs9 · #2 09-11-2004, 02:21 PM

I dont know if my links worked here they are agin, If they work.

http://www.rbinnovations.com/newsite...K10530_544.htm
http://www.rbinnovations.com/newsite...percharger.htm
http://www.rbinnovations.com/newsite...ypervalve1.htm
there they should work

CENthasizer · #3 09-11-2004, 04:43 PM

OH...MY....GOD, dont mean to sound rude, but this has come up in every nitro forum online, including this one about 10 different times. All this thread will end up to be is a war of theory's. There is no one that has tested one that i have seen so we dont know how it performs. However the theory is that on a 2-stroke it wont improve anything because it would blow out the exhaust.
Prepare for a war!

mgs9 · #4 09-11-2004, 06:03 PM

Oh ok. I guess it was dumb to ask. I dont know how I missed them i usly just skim through the forums. Yea I though about that, It looks like it would be forcing useless air into the carbureter. Ill email them see how its supposedly sapposeto work. Thanx anyway

ElectricThunder · #5 09-11-2004, 08:34 PM

There's been a huge debate about them....and the general concensus seems to be that they don't work and aren't logical. A huge flame war usually gets started on this stuff...lol! Sometimes it's very funny to watch.

But anywho. Don't mention NOS for RC either...that's just askin for it....LOL!

Chris LaPanse · #6 09-11-2004, 09:17 PM

They would work perfectly

on a four stroke

mgs9 · #7 09-11-2004, 09:59 PM

Yea i dont want to start a flame war. If they dont work thats dumb that they make them. They probly dont work unless theres a reason we missed that it would work???

Do you think it would work on some of thoes 4-stroke airplane engines.
They havnt emailed me back yet.They better have a good explaimation as to how they work on a 2 stroke.

Chris LaPanse · #8 09-12-2004, 12:19 AM

I'll bet they would give a noticeable increase on any 4-stroke engine. We all know that they work on full size four stroke, even diesel (which don't have spark plugs).

rcboy201 · #9 09-16-2004, 05:05 PM

the reason they make it is because rb innovations thinks they work and some people are dumb enough to buy them

grannys · #10 09-16-2004, 05:38 PM

Remember the 2 stroke Detroit Diesels that came from the factory w/ a supercharger.......

Grant

Chris LaPanse · #11 09-16-2004, 05:49 PM

Really? Can you give us a link?

Scomp87 · #12 09-17-2004, 12:47 AM

I never got into those flame wars... but even if a superscherger does blow tons of excess straight through, there are still more molecules going through that chamber, and when the port close up, theres more air, and the same space. correct me if im wrong, it still works on a 2-stroke.

http://www.turborick.com/turbobike/archive/0888.html

Mike Keeney · #13 09-17-2004, 01:32 AM

The function of a supercharger is 'almost' exactly the same as a turbocharger.

Everything revolves around the fuel to air ratio. For example, a normal gasoline engine runs best at 14 PPM (Parts Per Million) fuel to air ratio. At idle the engine is fed a small quantity of fuel which is atomized and mixes with a restricted amount of air. When you accelerate the butterfly opens to let in more air, which is mixed with a higher quantity of fuel. The farther you press the accelerater down the more fuel and air get into the engine. The magic is that the 14 PPM ratio is maintained at all times. You can change the ratio if you like, but keep in mind that 14 ppm is the optimum mix. Lowering the ratio to 13 PPM will lean out the engine and decrease performance. The same is true for if you raise the f/a ratio. The engine will run rich and performance will again drop.

What a supercharger or turbocharger does is simply force more air into the engine. If you kick up the fuel feed proportionatly, you get more power. Superchargers on T/F dragsters pump in enough air and fuel that by the time the piston is at TDC the mix is nearly a solid. But no matter how much air and fuel is in there, the optimum ratio must still be maintained.

Cheers,
Mike

cool head · #14 09-17-2004, 10:41 AM

actually that 14/1 ratio is not the best ratio for power. 14.7-1 is the stoiciometric ratio. and that ratio emmits the lowest emmisions. if you want power in a gasoline engine the ratio will be a lot richer. in a glow engine the ratio is like 3-1. but the fact is, without a bunch of modification to the exhaust and intake, superchargers and turbos will not work on a stock 2-stroke engine. they do build a 200hp kit for the banshi ATV. it includes pistons, cylinders, turbo and exhaust. the cost of the conversion is around $6000. the banshi only costs $5000.

mook · #15 09-17-2004, 12:54 PM

This is interesting me.

so I have a question

Why do people port there engines? is it to improve gas flow?

If so,then would a supercharger not improve gas flow /velocity- giving more power?

cool head · #16 09-17-2004, 09:05 PM

to answer your question. no. velocity will change with engine rpm, but the amount of air/fuel drawn into the engine for each cycle is limited to displacement and carb orface diameter. porting an engine changes the way and time the air fuel enters the crank case, and how it is transferd from the case to the cyl. porting an engine is usually done to to improve the exchange of gasses from the crank case to the cylinder, and removing the unwanted exhaust gasses that remain in the cylinder when the intake charge enters the cylinder.
the carb works by vacuum drawing the fuel into the intake air stream. when the crank window closes. the preasure from a t/c or s/c would still there and has no place to go. and i would imagine the preasure will force the fuel back towards the tank if the preasure is greater than the exhaust preasure to the fuel tank, following the path of least resistance. thats just one of the reason it won,t work. another is because of the port configuration, there is a moment when all ports are open at the same time, constant preasure when all ports are open will force a good portion of the fuel out the exhaust and without a much larger expansion chamber you will be unable to scavange that charge back into the cylinder, wasting a lot of fuel and soaking the side of your car with it too.

hope that gives some fuel for thought

Soupisgoodfood · #17 09-18-2004, 01:49 AM

Quote:

Originally Posted by grannys

Remember the 2 stroke Detroit Diesels that came from the factory w/ a supercharger.......

They were probably valved 2-strokes.

12 cylinder, turbocharged, 2-stroke diesel engines are quite commonly found in locomotives. Infact, these types of 2-strokes require a supercharger or turbocharger to run.

http://auto.howstuffworks.com/diesel-two-stroke1.htm

The problem with the 2 stokes we use isn't the fact that they're 2-strokes per se, but that they're valveless.

ctwalker · #18 09-18-2004, 10:27 AM

I have driven several of those 2-stroke Detroits. They have a turbo, not a supercharger. Also way different construction than a nitro engine. Conventional valves etc.

mgs9 · #19 09-18-2004, 12:07 PM

I emaild that site a couple days ago asking how much power they increas the engine. They said that the super chargers would give a 25% power increas, saposing they work. I also eamiled them about how they would work on a 2 stroke. They havent emailed me back yet.

vtl1180ny · #20 10-13-2004, 11:34 AM

Quote:

The problem with the 2 stokes we use isn't the fact that they're 2-strokes per se, but that they're valveless.

Bad misconception.... There IS an intake valve... Pull off your carb and spin the flywheel...

NitroBoy24 · #21 10-17-2004, 03:58 AM

The fact there is an intake valve doesnt make any difference. If you are forcing air into an engine that has no exhaust valve then having an intake valve doesnt really matter now does it? It is possible to succesfully S/C 2-strokes, its just a pain in the rear. Give Maverick Racer a pm if you want a very detailed response

Edit:
Hahaha, howstuffworks.com, awesome site!!!

mgs9 · #22 10-17-2004, 03:11 PM

like nitro boy said, it dosnt matter theres an intake valve. The valve in nitro engines are not run off a cam shaft, when you have a cam shaft and a super charger, it makes the hole engine run faster so the cam shatf runs faster, opening and closing the valves faster, in the end making you engine run faster.
I actuly think that it would make it run a little better, i think it would force just a little more fule-air in, but not a hole lot because the engines alrready force alot in as it is to begin with.

4x4_Racer · #23 10-17-2004, 11:06 PM

Aint worth your $$ if you ask me.

NitroBoy24 · #24 10-19-2004, 01:09 AM

Quote:

Originally Posted by mgs9

like nitro boy said, it dosnt matter theres an intake valve. The valve in nitro engines are not run off a cam shaft, when you have a cam shaft and a super charger, it makes the hole engine run faster so the cam shatf runs faster, opening and closing the valves faster, in the end making you engine run faster.
I actuly think that it would make it run a little better, i think it would force just a little more fule-air in, but not a hole lot because the engines alrready force alot in as it is to begin with.

The most important thing about camshafts and exhaust/intake valves is that the air your forcing isnt shot straight out the exhaust port (if it were on a 2-stroke).

And unless your going for the eye-candy/bling factor save your $$$.

rocketguy · #25 10-19-2004, 09:39 PM

on the detroits.. the supercharger really isn't one.. it is just a blower, the engine operates exactly like a two stroke, except the blower blows exhaust out and pushes clean air in.