Torq3r

Just looking for some guesses at the final WHP of this build. Hoping for 450-500.

Eagle 4" crank
wiseco -8cc pistons
PRC stg2.5 5.3 heads milled to 61cc's
234/238 .602"/.615" cam
LS7 lifters
LS6 intake
36# Injectors
pacesetter 1 3/4 headers

should be about 11:1 CR
...and a whole mess of gaskets, etc for the rebuild.

95ONE

iTrader: (1)

Looks like you're about right. But that's my desktop butt dyno talking.

TransamGCS

iTrader: (2)

i would say about 450-460 rwhp with a good amount of torque

christiandoy

iTrader: (1)

yeah that should work nicely man I'd love to see the dyno results

Torq3r

Any advice if upgrading to a walbro 255 would be worth it on this build? It's going into an 04 GTO.

Any other opinions on the numbers would be appreciated too.

mark21742

I room my 408 to 8,000 rpms in my 04 GTO with stock pump and 60lb injectors....I've never had a low fuel pressure issue

Old Geezer

iTrader: (3)

Those 36# injs are going to "have their tongue hanging out" at 500RWHP....rerun the math using FWHP.

mark21742

I agree with old geezer....look around for some 42lb injectors because the ones you have now will be maxing out pretty quick

06X6spdGTO

iTrader: (6)

Im at 92% duty cycle on my red top svo 30lb/hr injectors on my c5z. 463whp

06X6spdGTO

iTrader: (6)

Forgot to add thats @ 7200rpm

SSdreamz

iTrader: (3)

I have different heads, out of the box AFR 205s and 238/240 cam through 1 3/4 headers and LS6 intake making the numbers in my SIG