How Much Boost ? Rb26 Crankshaft

[95GTR600]

I know it depends on several factors but I want to confirm how much boost have you ever go with forged RB26 engine with stock crankshaft ?

I mean forged pistons, rods, race bearing, valves, etc....

[R32 Driver]

how much hp do u want?

theres only so much boost a turbo can flow

rest of the components will determine how much hp the engine can handle

[GTR-32U]

As far as I am aware the stock RB26 Crankshaft is a very strong unit.Capable of withstanding quite a lot of power..What Turbos are you running ?

[Swiper the Fox]

I know it depends on several factors but I want to confirm how much boost have you ever go with forged RB26 engine with stock crankshaft ?

I mean forged pistons, rods, race bearing, valves, etc....

i used to run 34psi on my old unprepped stock crank (late R32 crank...same as R33) in dyno comps...28psi at the track. 10.34 @ 134 MPH

i also ran 25psi on my new prepped R33 crank when racing and dyno (500AWKW) 9.95 @ 139 MPH

i will now run 35psi on my old prepped R33 crank when racing and dyno (660+AWKW) Hopefully 8.99 @ 152 MPH

Mark Jacobsen runs 40psi in his racecar with std crank on methanol and runs 7.84 @ 184 MPH

Marks dyno R34 runs 45psi on stock crank and makes 1350awhp.

i think your stock crank will be fine.

Edited February 14, 2009 by DiRTgarage

[Cjmartz2k]

OP clearly doesn't understand how boost vs cfm vs hp works.

PSI has nothing to do with anything other than what a certain kind of gasoline can support at a certain compression ratio. Compare the hp a T88 makes at 1.2 bar vs a stock turbo at 1.2 bar. Comprende?

[95GTR600]

i used to run 34psi on my old unprepped stock crank (late R32 crank...same as R33) in dyno comps...28psi at the track. 10.34 @ 134 MPH

i also ran 25psi on my new prepped R33 crank when racing and dyno (500AWKW) 9.95 @ 139 MPH

i will now run 35psi on my old prepped R33 crank when racing and dyno (660+AWKW) Hopefully 8.99 @ 152 MPH

Mark Jacobsen runs 40psi in his racecar with std crank on methanol and runs 7.84 @ 184 MPH

Marks dyno R34 runs 45psi on stock crank and makes 1350awhp.

i think your stock crank will be fine.

Many thanks for your response.

I hope all the users could learn from somebody like you.

[The Dan]

Many thanks for your response.

I hope all the users could learn from somebody like you.

When I grow up I wanna be just like him.

[R31Nismoid]

lol, you're gonna be one ugly bloke then

[shanef]

lol, you're gonna be one ugly bloke then

he doesn't have to grow up for that

[95GTR600]

how much hp do u want?

theres only so much boost a turbo can flow

rest of the components will determine how much hp the engine can handle

I want 850whp

[95GTR600]

As far as I am aware the stock RB26 Crankshaft is a very strong unit.Capable of withstanding quite a lot of power..What Turbos are you running ?

We are using one Borg Warner S372 A/R 1.1

[95GTR600]

OP clearly doesn't understand how boost vs cfm vs hp works.

PSI has nothing to do with anything other than what a certain kind of gasoline can support at a certain compression ratio. Compare the hp a T88 makes at 1.2 bar vs a stock turbo at 1.2 bar. Comprende?

Probably if I ask how much hp ? RB26 Crankshaft ..... only will receive one response 1350whp now thanks to DirtGarage response I won a local discussion between friends... Capici ?

have fun