M6HuggerSS

i was told 5.3 heads make more power than 5.7 heads because of the increased compression, but how much more? 10.5-1, 10.75-1,11-1....
im in im guessing 11-1 CR is to high....what do u think? whats CR do you get with no milling....im looking A PP5.3's.....

2001CamaroGuy

iTrader: (6)

no mill = 10.8:1

0.030" = 11.2:1

10.8 is good if you want little to no octane problems. The 11s are not bad (I'm running 11.1:1 on 91 in 110degree AZ summers without "much" problem) but they can be someone touchy.

M6HuggerSS

so how much more power does a non-milled 5.3 head make over a 5.7 head....

2001CamaroGuy

iTrader: (6)

its hard to say......