408 with ls1 heads would lq9 317 head help?
#1
408 with ls1 heads would lq9 317 head help?
I currently have a 408 with an sts turbo with ls1 head ported pretty good. My ? is would it be worth it/help to go to 317 lq9 heads? Are the 6.0 heads better for boost? Do these flow better? I cant afford afrs. Any info would help thanks.
#4
The heads are supposedly ported to the max & have over $1k into total machine work and vavles. I heard the deck height wasnt high enough and the heads would lift at over 12psi? This is what I was told by a tuner. Whats the most 5.7 241s can flow on a 408 boost wise for a rearmount?
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#9
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Patriot heads are great. I had some on an old setup and they are good stuff. The 317 will net you a larger combustion chamber. You could run a higher boost with those heads, I would say 18 would be safe. I have a friend tha tis running 15 on 91 octane on stock 317's. 760rwhp on a 370.