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Old 08-21-2008, 09:19 AM
454C10 454C10 is offline
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I get 9.72:1cr.

785cc cylinder
72cc chamber
8cc head gasket
6cc reliefs
4cc deck height


you will be on the edge of detonation with 91 octane if the engine runs hot.

Yes, those manifolds are killing at least 75Hp. That could be a 400hp engine with headers and a performer rpm intake. You might consider adding bigger jets in the primary's and some richer rods in the secondary's.
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