I think im crazy , you guys can agree with me or not. I have a 1982 Suzuki 175 PE.. 2 stroke motocross bike. I am wondering if I could turbo it, what size turbo.. T2wheel trim or t25, and what kind of carb i would need for a blowthrough setup.
Is this achievable.. or is it just plain.. silly?

Daryl

 

any comments? think its dumb? anything?!?! cmon .. gimme info!

 

on a motocross bike...i think its a little extreme...but people do crazy **** like this all the time...but i have to give this idea a thumbs down

 

I think its a good idea. let me know if you actually do it. I might want to do it to my 96 CR125.

 

I think it would smoke really bad, be loud as **** and burn a lot of oil...so I give this idea a thumbs up

 

AWESOME.. thats what i wanted to hear.. lol

now I need some expertise.. as I am an engineer in progress, so I do not know enough. I dont know how much the engine flows.. *cfm*, nor do I know what size carb I would need.. I would need an oil pump and an oil pan for the turbo.. and an air filter.. then only an appropriate turbo and matched carb.. and I can very easily fabricate the rest. By removing the airbox.. i could free up some room.

btw.. its a $1000 bike right now.. roughly..
the engine has been rebuilt.. new flywheel.. etc..

 

Sure you could do it. I tell you what you need to do, go find turbo hyundai 3cyl from the junk yard. Get the turbo, get a blow through carb (possibly from a bike shop) and enjoy the pleasures of boost.

 

would you still use it for motocross? i would be afraid of it hitting full boost at the top of a jump and either flip or jump about 300 ft and jack yourself up

 

wow tell me if you do this. ive been wanting to turbo my jetski for awhile. its 2cyl though that might make things difficult.



steve

 

I dont motoX it now, and never will.. the bike is WAY too old.. I just ride the **** out of it, and it needs more *****. I am having carb troubles right now.. so I am going to say fuckit, and find me a turbo and a different carb. I was going to look for a turbo off of a firefly, or something like that, but I am not sure if that is too big. Also, I really do not know enough about turbo's to convince myself that it is the right size for the bike. I can fabricate quite well, but before I touch it, I want to know that it has a very high chance of working. I was hoping by coming into the single turbo forum that someone in here would know a turbo that WOULD work for sure, and what car (year, make, model) and how much boost i should run. I am thinking no more than 5psi, otherwise I would probably blow it up. fc1jz
can you tell me more about which hyundai, and what size turbo? thanks - btw nice jetski and FD steve...
Can I borrow them to pick up some babes?
Daryl

 

Turbo'ing a 2 stroke isn't going to happen. First off, a 2 cycle is EXTREMELY sensitive to back pressure. Second, a 2 stroke exhaust pulse is fairly weak. Third 2 strokes have EXTREME OVERLAP, and any boost you make (if you actually can get a turbo to spool up between choking the motor and the weak exhaust pulse) its all going straight out the exhaust. Fourthly (is that a word?) if some how you manage to over come physics and make boost, the large amounts of residual exhaust left in the combustion chamber left over form the last cycle is going to pre-ignite the newly fresh boosted charge entering the combustion chamber. There’s a reason you don’t see turbo'ed 2 strokes.. it doesn’t work. Now if you had a 4 cycle, this would work GREAT, I'd love to turbo my little Ninja. I call it my Moped, it’s a 250 cc parallel twin. I've seen one guy turbo this bike, but cant find any thing about him, or how the bike did

~Mike............

 

uhhh...ERRR. Check out dirtwheels or 4 wheel atv action, they had a cover page banshee that was boosted. Made like 200rwhp (dont remember exactly) this is on a 300-400lbs bike by the way. Turbonetics made the setup to I believe.

-Marc

 

id like to see that

 

I'll look if I get the time..I had the actual magazine issue. It was sweet, talk about "white knuckles" holding onto that son of a bitch.

-Marc

 

mike does have a very good point. I think it hit home actually. However, I do have a 1980 XR200 that I just rebuilt.. and its a 4stroke.. I am cutting the frame on it, extending it, dropping it down to make it a chopper.. then i will have to re-weld the shock mounts and get a longer chain. anyways.. thanks for the input... I think i've come to my senses about my motox bike.. lol
who knows if the chopper bike will see a small turbo or not.. it definately needs MORE power before I make it streetable.

 

Boosted, efi, ic'd banshee

 

another...


one more..



These bikes have 2 strokes, not 4..hehe...

-Marc

 

very nice.. well that proves it CAN be done, its just a question of how hard, etc. that is definately a 2stroke.. you can see the tuned pipe in the first 2 pics, although I do see twin carbs in the 2nd picture, so you may be wrong about the EFI.

 

HOLY **** DOIASCNLEADVGA<MCJN:SFHAWDNQ!!!!

I've always loved the Banchee.... 2 stroke 350 parallel twin. Infact I thought about installing the Banchee motor (also comes on a motor cycle, but I don't recall the name) in my baby Ninja as well, but the cost of these motors and parts are crazy.

This is the first sucessful 2 stroke turbo I've seen, BAD *** man... BAD ***.......

BTW, those are definatley carbs in the second and third pic, you can even see the pull up chokes. I guess they could be gutted carbs with injectors installed somewere too I supose. The first pic is EFI, are all these pics of the same bike?? Ones chrome frame EFI, the other is purple carb'ed, the third is silver frame carb'ed... or did they change their minds on the bikes color 3 times during the build???

Humbled ~Mike..................

 

haha..sorry for the confusion. There 3 different bikes. The first one is DEFENITELY fuel injection!!! See the fuel rail, it has AN fitting on th ends. I wish I could find that article with the turbo banshee from dirt wheels or atv action, 300 some lbs and as much power as your b18c gsr engine...talk about fun..

-Marc

 

Not just smoke, but also fuel out the exhaust. Boost+reed valves+port overlap, as soon as the piston drops far enough to expose the exhaust port, the turbo can freely blow the fuel/air mix through the crankcase, into the cylinder through the intake ports, and right out the exhaust port.

http://www.trickracing1.com/home.html

Rotary valved 2 strokes shouldn't have the same issues, but obviously either ones can work with a turbo.

The REASON 2 strokes are so picky about exhaust tuning is because of the overlap and no dedicated intake cycle. The exhaust flow has to scavenge the cylinder AND partly suck in the intake charge! Positive pressure in the intake from a turbo takes care of cylinder filling.

 

well the exhaust would be much higher pressure than the intake even if it is boosted so it would leave the cylinder faster, and with a properly tuned pipe the exhaust will push the overflow intake mixture back in just like its supposed to normally. since a tuned pipe acts like forced induction, with a turbo it would be double boosted

 

I would really recommend a heat protection over that turbo, in THAT place. Otherwise your *** will get fried :-D

 

One of my friends has a turbo charged 2-stroke snowmobile, it works. He has blown it up once though, but I think it was just a tuning issue.

 

On a nice fresh modified engine yes. On a old worn out one I would like to see this. You would have to worry about the crank case hope its nicely sealed!!