dan1970

It's plain and simple turbo chargers will NOT work on single cylinder, non fuel injected engines. It just ain't gonna happen. I'd say he just hit the sweet spot wth tuning, and may be even running a bit too lean. the 3.3 should be able to wheelie a revo even on grass when it's properly tuned.

My two .02 cents

Dan

Brent Davis

Dan I agree with your .02 cents that a TURBOCHARGER won't work on these engines but I can say that the supercharger did fine for me. I had the truck out today for a few minutes in 38* weather and that thing was even stronger with the cold air. I had the body on it and the temps never got over 180*. The leaner I tried with the HSN, the truck started to run with sputtering and all that so it wouldn't let me lean it out at all anymore since it needed the extra fuel but even at that temp, it didn't care because it was as strong as it was from the last video.

I still plan to do back to back test stuff as well.

snoking16

keep us informed on how this thing does...im predicting pre-mature failure. if anything dont lean it out its already running lean due to the supercharger.

ttoks

running at 180 you wil get pre-mature failure, that is about 100 degrees to cold.

and a turbo will work on a single cylinder carby 4 stroke, O.S sells supercharged versions of there 4 stroke plane engines, and if you look around you tube you'll find a few videos of turbocharger lawnmower engines.

Brent Davis

Gonna wrap the engine if I take it back out first. I agree and know better that 180 is waaaaaay too rich and can break the crank.

megamaxx

oh!dont get me wrong,brent,if i could get my hands one that cheap i would strap it to some engine i didnt like and run it till it explodes,i like to have the experience/knowledge of running things first hand,the only thing that really ever stopped me was the maintainance/breakage factor.

iamnot

180 degrees does not necessarily mean the engine is too rich
it just means that it is running too cold
leaning to the point of starving for fuel combined with too cold is going to cause tremendous wear on the piston and sleeve
situations like this are why it's important to know how to tune by performance, sound and smoke
the temp gun, in the conditions you are running, is useless except to be sure that you're over 200 deg after it's properly tuned
if it's not over 200 then you need to correct that with external means, like wrapping the head, not by tuning

imo, you've started to bump up against one of the problems with sc's.
the special tuning problems that you encounter when you start altering the air/fuel mix
many people don't realize that it's possible to run an engine too lean and the temps still be spot-on

still if i got an sc for super cheap i'd be trying it out too

HighClassBasher

Honestly you could GIVE me a "supercharger" for FREE and i wouldnt even think about installing it[:'(] I personally would sell it on e-bay and buy i something worth while
No offence, to each his own.....

beer=food

Well they work, fact.
Limited gains yes, but they work, no they dont lean it out, they increase overall flow of air and fuel.
Everyone always knew it would be hard to get any gains out of such a device plugged into an engine that already revs it butt off.
But they did it, may not last long, but it does indeed work.
To me there more hassle than there worth, but sometimes you gotta bite the bullet and change your view, from they dont work, to they do.
You cant beat evolving technoligy.
If its possible, LOL, humans, sooner or later......

l never believed until l saw one going.
Ex mechanic, everything l know tells me that thing probably shouldnt run at all, yet there it is with real gains.

All l can say is, alot of us in here who have posted, stand to be corrected ! LOL !

Slayaah

The first turbos was in fact with a pressurized carburator!
Works fine but yes, injection is the better choice just because if you to tune it for max pressure and will run very rich when you run less pressure or lower RPM.
While more modern engines with turbo adjust the fuel mixture according to load,rpm,boost et.c

And, you can use turbo on an 2-stroke but it doesn't really work as good as on an 4-stroke!
We have a friend to our family that were into Snowmobile drag racing, and he was racing an stock looking Thundercat (3-cyl 1000cc 2-stroke) that he ran with larger bore and turbo.
He actually won the Swedish Championship with that thing, took a hell lot of gas but it worked for him! We lived there before..

Edit. But of course, this was an 1000cc engine not a RC engine, but just pointing out that it's not the engine type that is the problem
but you can discuss how much it really does for these small ones! If someone get it on a Dyno with the same K&N filter and exhaust both with and without S/C then we got proof!

mister_T

that statement is in no way true. forced induction workes extremely well on 2 strokes due to their poor volumetric efficiency. a well set up 2 stroke bike engine running reed valves may only be getting a high 70% VE. with such a small engine running insane rpm i can see this number being alot lower. by way of forced induction this will exceed 100%+. if you are telling me a 30% increase in VE has no effect on power output you must be mad. so even without the largely incresased cylinder pressures that youd see in a 4 stroke due to the ability to close the exhaust port for the duration of the induction stroke you will still be seeing results.
if these superchargers arent working id put it down to bad design or fitting. but as this thread is confirming that improvements have been made then i dont see a problem with either, although longevity of a part like this would be a concern of mine. but for $25 youd be crazy not to find out how long it will last