SPDEMON

So at what point hp wise or RPM wise is the stock crank just not going to cut it?

I am going to be building a shortblock for the Trans Am and a $1,000 crank makes a huge difference for me $$$$ wise.

Opinions?

airfix

iTrader: (30)

What are your plans/goals for the build?

tricked94camaro

iTrader: (1)

what is your hp goal and what are you all doing to the motor?

silverz28camaro

iTrader: (20)

a stock LS crank can handle 800+, not sure on the LT's

pistons and rod bolts are the limiting factors on the LS's, many people go with rod bolts and forged pistons, make sure your fuel pump and injectors are up to the task, then walla, you have 650-700rwhp reliable potential

hitmanws6

iTrader: (20)

NA? Spray? FI? For NA you really don't need a forged crank. For spray you should be fine unless you are running a ridiculous shot. If you decide to go forged go with a stroker crank. Will make more power and torque everywhere even with the same topend

hitmanws6

iTrader: (20)

FYI LS cranks are rated at 1100 at the flywheel

SPDEMON

Looking for about 400-420rwhp NA, and maybe run a 150 Shot. Everything else is built and ready to go.

hitmanws6

iTrader: (20)

Stock will be fine, have it turned 10/10 and use some ARP bolts throughout.

ls1adamls1

iTrader: (9)

i have a question on topic here,

what if it were to become a stroker 383 NA. would a cast be fine or would forged be needed?

hitmanws6

iTrader: (20)

Forged. Cast should never be considered. Even cast 3.46 stroke cranks are weaker than the stocker

quik95lt1

iTrader: (7)

the thing that really kills a cast crank is rpm.......they tend to want to flex alot at that high rpm and begin to reak havoc on a motor.......if you stayed around 6000 i bet it would handle 700+ fwhp........but once you start going to that 7000rpm+ range id swap it out for a forged offering........i twisted my 355 7000 with a stock crank making around 515fwhp......ran fine for two years.......but that was the limit of what id run it......my new motor ive been twisting 8000rpm+ for two years with a callies forged crank and upon this tear down it looked like brand new........you get what you pay for....