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Old 01-10-2013, 02:26 PM
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Originally Posted by Mr. P-Body View Post
...9.5:1 (accepted limit for 93 octane and iron heads on a Pontiac)
Originally Posted by cobalt327
The OP's 4X 455 heads w/a 0.060" cut and FT pistons and a 0.041" quench will give him right at 9.1:1; 9.5:1 is the max I, or anyone who knows what they're talking about regarding Pontiac engines w/iron heads would recommend he use, anyway.
blakethechop, you would do well to follow the recommendations shown here regarding Pontiac CR w/iron heads.
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