98transguy

iTrader: (7)

i see a lot of the sponsors that build motors for boost will use a 4" bore and use a 3.625 stroke. is there an advantage to use a shorter stroke compared to using a full 4" stroke on a forced induction motor, and what is the advantage?

2000 Tran Zam

iTrader: (2)

I believe typically people will run a shorter stroke so they can rev the engine higher.

Less stroke means less total up and down movement, so less chance for **** to break at any given higher rpm.

I could be completely wrong, but I think thats what Ive read.

Oh4GTO

iTrader: (46)

The shorter stroke works great with centrifugal blowers. Since the boost is exponential to the RPMs, you can rev higher for more power without stressing the motor so much. However I dont see why someone would do that if you can just turn up the boost on longer strokes andnot rev so high. Im sure someone a lot smarter than me will step in.

chuntington101

it basically mean you get a great power band as you have more rpm to work with (aslong as you rev it harder). also they canbe made to rev 'quicker' than a long stroke neaning quicker spool on a turbo engine. also you can make more power thank to take the rpm band higher.

thanks Chris.

DaveSchott

iTrader: (5)

Old school wisdom was that f.i. engines work best when using the the longest stroke feasible.