ORIGINAL: TSR10

you know what if the next freakin post isnt an answer to my question im off this site completlycause this is rediculous.

ORIGINAL: rockNrollRC


oh please don't, that would break my heart

no need to be a drama queen

ORIGINAL: savagecommander

no turbos. RBinnovations had a super, but thats all ive ever seen on the market.

ORIGINAL: SAVAGEJIM

To me, I am starting to personally find replies like this on this subject to tick me off.

ORIGINAL: DavidAgar

Okay, guys and gals, we need to get back on topic or the thread will be closed down. Thanks Dave

ORIGINAL: proanti1


The thread has turned into a nice civil discussion... no need to shut it down.

Does anyone know of anyone who has turbocharged an os 4 stroke... I found a site years ago, but cant seem to now...

ORIGINAL: Foxy

Why it doesn't work? Simple. No valves. To understand this in the simplest way possible; block one end of a pipe (this cap is your closed exhaust valve), pour fuel in. The more fuel you pour in, the bigger bang you will get when you strike a match. Now remove the cap on the pipe (open exhaust port as per nitro engines), pour in fuel. Congratulations you need a new pair of shoes, but now you understand why forced induction can't work on a valveless engine.

ORIGINAL: 2strokelover



it appears nobody has talked about this for ages so dont know if anyone will read it but i have thought about the whole turbo 2 stroke thing on and off for years n back on it again lately bored at work, bare with me, i dont really know much about rc or turbos but love two stroke dirt bikes and 2 stroke engines in general n thats why i have owned a couple of nitro r/c cars n think they r awesome n fantasise about a turbo rc nitro nearly as much as turbo charged 2003 honda cr 500 that makes people go ''holy jesus christ, i have always thought like most of u that know anything about a 2 banger that any extra air fuel pressure what simply blow straight past the back pressure of the exhaust that was designed to b naturally aspirated n be a total waste, BUT today at work i had alittle moment n got all excited about the idea all over again, this will sound STUPID at first but bare with me, i put a rubber cap over the end of a 14 inch steel pipe, drove just under a mile to the other end of the pipe and capped that, now i have a big steel tube sealed both ends by rubber caps, just out of boredom i slapped th cap hard as i could n still had my hand on the cap when the echo of the sound and pressure had travelled all thw way up the pipe bounced off the cap at th other end travelled back down the pipe n hit the cap i was still touching with surprisingly nearly the same force i had originally hit it, a light bulb went off n i imagined the steel pipe was the expansion chamber on my kx 250 (2stroke) i cut a whole in the middle of the rubber cap about the size of a fist imagining if my bike exhaust was th size of th pipe how big th whole at th end of the expansion chamber would be where it comes into th tail pipe n then on to the silencer, i drove to th other end n slapped th cap with no hole in it n waited to see how much pressure echoed back and it was as i had predicted alot less force came back due to the hole at the other end where back pressure had been lost, i pictured my bike leaning against the wall quiet and unridden n thought if it had a turbo at the end of the expansion chamber wouldnt alot more of the reflecting sound and pressure wave of back pressure be retained by the turbo itself, probably quite proportionately to the increased pressure of th fresh fuel air mix? the bigger the turbo the more the increase fuel air but also the bigger the turbo the less exhaust back pressure out? in proportion to each other? then i hear voices saying but it will run lean u have more air but no extra fuel cause u still have standard jetting r u really gonna do ya head in over it again it cant work or someone alot smarter than u would have already done it, BUT wouldnt u actually need to KEEP th standard jetting cause if u suck more air through the carby the venturi effect actually will want to suck proportionately more fuel through the jets thus keeping your fuel air mix as it originally was? so in theory at least i havent had to change the exhaust, or th carby, or add any stupid valves or anything that will over complicate the beautiful simplicity of th 2 stroke, so obviously its just a theory n someone will probably burst my bubble n give me a good explanation why it wont work and please do but until then i will be day dreaming away at work about some crazy ridiculously powerful turbocharged 2 stroke engine, be gentle when u shoot my idea down i have read a couple of threads n people seemed to get a bit nasty about the whole thing sometimes,

ORIGINAL: proanti1


It doesn't work with rotary valve two strokes because the fuel mixture must enter the crankcase first, then the intake is closed off before the mixture is shot into the cylinder. Turbochargers do work with reed-valve two strokes, snowmobile guys have been doing it for years.