Turbo on a 2stroke?
#1
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Turbo on a 2stroke?
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
Is this achievable.. or is it just plain.. silly?
Daryl
#3
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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
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Originally posted by croatian 3gen
I think it would smoke really bad, be loud as **** and burn a lot of oil...so I give this idea a thumbs up
I think it would smoke really bad, be loud as **** and burn a lot of oil...so I give this idea a thumbs up
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..
#7
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.
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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
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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
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
#11
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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............
~Mike............
#12
FC Mobsta
Originally posted by RacerXtreme7
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............
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............
-Marc
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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.
who knows if the chopper bike will see a small turbo or not.. it definately needs MORE power before I make it streetable.
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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.
#19
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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..................
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..................
#20
FC Mobsta
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
-Marc
#21
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Originally posted by croatian 3gen
I think it would smoke really bad, be loud as **** and burn a lot of oil...so I give this idea a thumbs up
I think it would smoke really bad, be loud as **** and burn a lot of oil...so I give this idea a thumbs up
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.
#22
Registered Piston Eater
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.