Boosted 2 Stoke

[FearTheH]

Maybe a stupid question but im still learning 2 stroke engines. Does anyone know of a way to effectively boost a 2 stroke? I've heard it's a horrible idea but that source was previously deemed unreliable due to stupidity. Reason I ask is I have a small turbo laying around that would probably be good for about 5 pounds of boost and just wondered if it'll completely destroy any work I put into my blasty. As always, thanks in advance guys!

 

[brandoz28]

no one has really successfully done it on a blaster (at least here)

main issues are:

oiling
carb mods/fueling

 

[FearTheH]

So even with a larger carb, petcock, fuel line and jetting and a higher oil to fuel ratio ie. 24:1 you wouldn't suggest it? I used the turbo on a built 5hp briggs and had a self contained oil pump to keep the turbine bearings lubed. Just getting curious lol

 

[brandoz28]

you need to mod the carb to handle the boost, getting enough fuel to it isn't the problem, getting the carb to properly meter is the issue

 

[FearTheH]

What do you mean by meter?

 

[blasterdemon7]

If you don't have enuff money to be buying lots of part, don't bother with it. There's alot of thing that can go wrong on the road to getting it rite .

 

[brandoz28]

basically you need to boost reference the carb. this way it keeps giving it the right amount of fuel.


this is pretty overly simplified. if you're wanting to go power adder, i'd run nitrous

 

[DirtDiggler]

You'll just blow out the crank seals and detonate the motor . and for what , 15hp? its a waste . You'd have to install a electric fuel pump , a injection system to richen the intake charge on a boost curve , which will require a air/fuel ratio monitor that talks to the injection system via a ecu . The stock stator will never provide enough juice for that , so you'd have to buy a new HO stator , float the ground and make a dc power system and add a battery . Lets say all that sh*t works right , so now you have the excessive amounts of heat to deal with , you'll need a radiator , water pump , hoses and some kind of cnc machined custom watercooled jug and head combination because otherwise the stock yamaha components will melt to your thighs .
But hey , thats just me talkin and what do I know?

 

[brandoz28]

or you could mod a carb for blowthru and run on methanol.

 

[FearTheH]

Thanks for the help, think ill just stick with n/a lol. I really just wanted to see worst case scenario...not so sure about the ecu and all seeing as there's plenty of carbed vehicles that are turboed that are pre ecu cars. Same with super chargers as well. Either way it still sounds to risky for all the work im putting into my blasty. Thanks again guys!

 

[brandoz28]

this wouldn't be something you did after doing a lot of work really..........this is something you'd completely build around

 

[FearTheH]

Lol or apparently a really awesome way to shell out more money to get a new motor! None the less, k would still like to see it done. There's a boosted 2 stroke scooter on youtube but it really seemed like it was running poorly... oh well nothing wrong with wishful thinking I suppose

 

[DirtDiggler]

Why not just stuff that turbo'd Briggs in the blaster!!! For sh*ts n giggles

 

[Antec1200X]

why not just stuff that turbo'd briggs in the blaster!!! For sh*ts n giggles

lol'd
151515151515

 

[FearTheH]

I may lol ill have to find another briggs raptor steel bore block. I used to race go karts in the world karting assoc. and there's actually a class for forced induction. There's a company called hansen that makes a supercharger for heavily modified briggs motors. Not a typical supercharger though. They're tons of fun but cost a good bit more to build than a blaster...I was shocked to see how inexpensive blaster parts are...I love it!

 

[FearTheH]

lol'd
151515151515

Jw, what's the 151515151515 mean?

 

[brandoz28]

i love how cheap blaster stuff is compared to race car stuff

good blaster crank=175 bucks

good crank for racecar=1200 bucks

 

[Antec1200X]

cant post less then 15 letters lolololol
guess i should of said it was a code to get a laugh

 

[99LRDblaster]

You could just run a really steep pipe expansion chamber and get residual backflow waves to boost it.

 

[FearTheH]

Yeah no kidding lol just a flywheel for our class we ran was 350 bucks since it was made of billet, which was required after multiple incidents where the cast flywheel flew apart from turning the high rpms