Phil99vette

iTrader: (11)

On a turbo application, at what power level do you need to change from lets say a 300-310cfm standard stage 2 head to a better casting that flows say 340-350cfm due to design? I am trying to decide to run ported LQ9 heads or step up to the ETP LS7 heads. The motor is going to start as a 40x cube iron block S95 turbo and eventually go to a GMPP iron block with 4.100-4.160 bore. Power goals are 1200-1400.
Phil

2002/Black/SS

iTrader: (3)

i think a sponsor here made 750wheel with stock 6.0l heads on a 370 or a 408, i cant remember

pwrtrip75

iTrader: (8)

To flow more air, run more boost.

bandit1

iTrader: (12)

Well if your goals are that lofty then I would go the smart route and buy it once buy it right.

Phil99vette

iTrader: (11)

I was thinking the same thing, the ET LS7 heads have a thicker deck, GMPP bolt pattern and flow a ton more. Its probably the smart choice.
Phil

black98ws6ta

iTrader: (77)

I made 920 rwhp on a mustang dyno on completely stock 6.0l heads(valvesprings), but im sure for his type of build it would be smart to go ahead and spend the money.

chuntington101

as black98ws6ta said you may as well get the best heads you can now! will make getting to your power goals easier. and means you canrun even moreboost if you want to!

Chris.

02SSLE

iTrader: (26)

I wonder if you can mill an Vic Jr intake to work with Ls7 heads?

MIGHTYMOUSE

iTrader: (59)

my heads barely make 300 and have a stock ls6 intake btween them and a stock tb in front of that

chris.shea

but why not just flow more air by removing some restriction? yea its cheaper to turn the boost controller a few pounds higher but compressing air more raises your IAT's(bad for power). 1000hp with 17lbs or 21lbs. its obvious one is more efficient. ill be grabbing some popcorn as im interested

Phil what intake you lookin at to keep up with the heads.

99Z28LS1

iTrader: (4)

im very interested too, im new to most of this stuff and wanna learn. but common sense would tell me to spend the $$$ and then upgrade what you have until the heads cant go any further

MIGHTYMOUSE

iTrader: (59)

common sense tells me to build it strong for FI and let the turbo do the work. more metal in my heads = better.

y2khawk

iTrader: (5)

I don't think I've ever ran heads that went over 300.

cablebandit

iTrader: (37)

My GTP heads flowed in the 290 range. Might get some patriots that do 320 or go to some livernois l92.

Juiced

iTrader: (2)

This is a good topic as the heads i was going to run might not work as the bore on the heads might not seal against the 0-rings.

Anyone else running big power numbers with stock castings and not lifting the heads?

SSilverSSurfer

iTrader: (8)

if he does the LS7 heads, i think the only intake he can run is the LS7 intake, if im wrong please correct me

Phil99vette

iTrader: (11)

LS7 heads with the GMPP bolt pattern.

BIG BAD BLACKSS

iTrader: (4)

Shouldnt the exaust port be as important or more imprtant seeing as you can force the air in, but the piston still has to push it out on its own. Ive always heard free up the exaust as much as possible.

What do unported LQ9s flow on the exaust side?