couldbemage

If you are still talking about RC, RC aircraft don't really fly high enough to have much of a pressure difference. ...and turbos are all over the place in real aircraft.

spy

Galaxy: I know more.
Nitroaddict: No I know more.
Billyman: no your both wrong i know more!
Galaxy:my manhood is bigger than yours.
Nitroaddict: no my manhood is bigger than yours.

Hyper10-3speed

Guys,, p.s. they do work.. have one.. also there is an error in you model Nitroaddict:

They work on the priciple of increased air mas/volume with an increased proportional fuel volume, however slightly the air volume is compressed through ther supercharger thus allowing more Oxygen into the intake, the fuel press in increased thus allowing more fuel to flow in. The resulting ignition is therefore increase but as a proptionate about is lossed in unburnt fuel.

They do allow for something very cool, if you modify your exhaust with a pen toarch fastend to the exhaust outlet so that the flame crosses the opening at an angle away from the car, you get a cool mostly white flame emulating from the exhaust. Some days only let me run in a lit parking lot to flames from your exhaust is cool when bashing...

Also to meet and ends, if super or turbocharging did not work why would ROAR make it illegal?

I get on adverage a 20% gain in power... Temps increase about 5%.... Just what I have sceen on my bench...

someguy

My Feedback: (1)

I think I know why ROAR makes them illegal, they dont really care if they work or not. You said it yourself, they spray unburnt fuel all over the track. That seems extremely safe and environmentally freindly.

Hyper10-3speed

It does not turn the car engine into a squirt-gun it just puts alot of fuel through the exhaust, it is still vaporized..

RaZ_Tx

it would still be an oily mess

Lola GT

Oh gawd...

Did anyone ever stop to think why these things are not on the covers of RC rags and why we don't see mpeg/movies/etc of them tearing up tracks and streets everywhere?


Because they don't work, in fact they can't work. We already have a supercharging technique that works very well for our nitro two stroke engines, it's called a tuned exhaust.

An animation is worth a thousand words, what happens when I start forcing air into my engine, it blows the charge right out the exhaust and it won't allow the pipe to work, you're left with less than you started with.

ko

like i said in another post...

i had one... tested it... tuned the engine to run the same temp as it did without it... used VASCAR (time over distance) and found nothing different... used k-band and found i lost top speed... took it off... sold it for $180 on ebay...

nuff said...

NEXT TOPIC PLEASE!!!

TRLS63

interresting read on the subject
http://www.aerocharger.com/tcat1.htm

Po Kid

Thank you!

Btw, the reason these things sell so well is because all the power hungry people out there with TMaxxes and Savage that are made of solid aluminum and theyc ant get enough power...so they see a Supercharger and think "This worked on my old Camero it should rock on my TMaxx!". So they spend 150 bucks on it, put it on, notice a little bit of power gain, but end up subconciously tricking themselves into thinking it is a bigger gain than it really is (or unknowingly tuning their engine leaner and not knowing it) then they tell all their friends and they go buy one because they are old and have nothing else to spend the moeny on ebcause they bought every other aluminum and Ti part for the trucks. *Deep breath*

And about Nitrous Oxide...that would be the same thing as running it lean...but it costs money?

couldbemage

There is always some wanna-be know-it-all in every one of these supercharger threads that has to tell everyone that supercharging can't work in a 2-stroke. Often, they cite the complete lack of forced induction in the RC world as "proof"... just ask your logic professor about that sort of proof....

Anyway, all the evidence anyone needs is in this thread:

http://www.rcuniverse.com/forum/m_17...tm.htm#1790945

ko

mage just stop... its already been proven wrong... just leave it alone

TeufelHundin

Why dont you guys send an e-mail to any companies that make these SC link them to this thread and ask them for the benchtop dyno info that they use to make their advertising claims.
If they can prove they work it would be good for them as this is a large forum and it would generate sales.

They should be able to provide imperical evidence through a video taped dyno session. Word of mouth is powerful advertising. If they cant or wont prove their claims then you know their product is crap and have RC-Universe post a sticky message in this forum to that effect.

Problem solved let them sink or swim on their own merit.

R/C fan-addict

I just felt like pointing this out:
if you go to this link: http://www.rbinnovations.com/catalog...0345df20b86e73
they say cold air is denser giving you better engine performance. Isn't hot air denser?

cossie

no cold air is denser

mgtman

true

WEATHER CONDITIONS

It’s a simple fact: for optimum performance, you must retune your nitro engine every time you run it. Anyone who assumes that the needles can be left alone once they have been set is sadly mistaken. An overnight change in weather conditions may prevent an engine from running or may put it at risk of some damage if adjustments aren’t made to the fuel-mixture settings. Ignoring an engine’s tuning needs compromises its ability to make horsepower. In response to certain changes in weather, equipment and other variables, nitro engines must be regularly retuned.

Temperature. Hot weather requires a leaner mixture setting; cold weather requires a richer setting. Most people assume the opposite because they treat the mixture needle like a thermostat. It is wrong to assume that colder weather requires a leaner setting to keep heat in the engine and vice versa. Cold air is denser than hot air. The denser, colder air packs more oxygen into the engine, so going from hot weather to cold needs a commensurate increase of fuel to balance ratio of fuel-burning oxygen and the fuel itself. The opposite is true in hotter weather. Going from cold to hot weather requires a leaner mixture setting.

Humidity. Humidity is the amount of moisture (water vapor) in the air. Moisture in the air takes up volume that would otherwise be occupied by fuel-burning oxygen. Less oxygen means less fuel is required to maintain a proper ratio of air and fuel. High humidity requires a leaner mixture setting than dry conditions.

Barometric pressure. A barometer measures the atmospheric pressure (generally listed in the local newspaper or on the local weather forecast on TV). Higher barometric pressure readings mean more air is getting into the engine, requiring a richer mixture setting to balance the air/fuel ratio.

Altitude. Altitude is an important factor that most of us ignore, yet it affects the engine’s performance possibly more than any other element. The general formula for power loss with increases in altitude is 3 percent for every 1,000 feet above sea level. If you race in Colorado at 5,000 feet instead of in California at sea level, you can expect to lose about 15 percent of the engine’s potential power output, if the engine is tuned properly.
Air is thinner at higher altitudes, which means there’s less fuel-burning oxygen than at sea level. You might sense a common theme here: less air (oxygen) means less fuel to maintain the proper air/fuel ratio. So, running at higher altitudes requires a leaner mixture setting than running at sea level.
TUNING
This chart indicates the direction in which you should adjust the fuel mixture when faced with changing weather and other conditions. It assumes the engine is currently well tuned. You could face any combination of conditions listed in the chart; knowing which way to go with the mixture adjustments is half the battle.
Higher air temperature Lean
Lower air temperature Rich
Higher humidity Lean
Lower humidity Rich
Higher barometric pressure Rich
Lower barometric pressure Lean
Higher altitude Lean
Lower altitude Rich
Higher nitro content Rich
Lower nitro content Lean
Higher oil content Lean
Lower oil content Rich
Hotter glow plug Rich
Colder glow plug Lean

Mopzilla

Guys, stop wasting your time thinking about how to supercharge a 2-stroke. Since this thread started there are a lot of cool new things out, including the OS .26 4-stroke car engine. Take THAT and supercharge it! Of course, the engine costs $100 more than a standard small block engine.... guess you couldn't prove the SC or TC on your old HPI .15fe....

GALAXY

I can't believe this thread is still going,its as simple as this: If you don't want a supercharger,don't purchase one and install in on your car,nobody said you have to buy it, or believe it,haha..lighten up and go drive.[8D]

tmaxx boy

i think that it will reck your engen
[&:][sm=punching.gif]

tmaxx boy

lol you doy's are not that smart for puting a carger in

NitroVette

This is the only RC supercharger that delivers boost, it can only do so because the valvetrain allows the exhaust valves to close on the intake stroke. You can not "pressurize" a port inducted engine.

Straick7

From my own experience on snowmobile engines(they are 2-stroke, just gasoline and not nitro), you will get a better gain from a properly tuned pipe. Three reasons for this.
1. The acoustical waves in the pipe will actually act like a SC/TC and act as an RPM limiter at the same time.
2. A pipe weighs less(no appreciable additional weight over stock), so you don't add the weight that the engine then has to move with the rest of the chassis.
3. You don't take any power from the engine to run the pipe.

These are just the things that I have learned from working on larger 2-stroke engines(292cc to 1000cc).
Don't bash me for these views, they are the ones that I have from my own exoerience.

Grits

You know...I'm tempted to tell everyone that seems interested in superchargers on a 2 stroke to go ahead and buy one, This poor old dead horse has been beat enough. They've been warned and if they want to spend their money trying to prove us wrong, go for it. That money would certainly be better spent on a pipe, or a bigger / better engine, fuel with a higher nitro content. gears or changing gearing with tires. All of these have proven performance gains. Super charging a port inducted 2 stroke, what a joke.

Dokioto

Were did you get that car? Did you make it yourself?

bigwillys58

ive heard that it works and then ive heard that it does not. from my experiences anytime you can feed a motor more air its gonna make more power as long as you put the extra fuel in to compensate. i dont think it would work on rcs for 2 reasons. reason 1because of the carb set up. the only way it might work is by using a draw through design. reason 2 the crank closes off the intake from the carb much like a rotary valve in a snowmobile. four strokes? yeah go for it. huge power gains. just take the modern diesel truck for example. same principle as a glow motor just a lot bigger. big boost = big hp until it flies apart.