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Old 11-03-2005, 05:28 PM
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Einstein might have had a formula that would work for the conversion but it's not something that I want to think about with a good buzz.

I will tell you that a 12-1 compression engine can have the same cranking cylinder pressure as a 9-1 compression engine with the right camshaft in it.

That said, assuming you're not Einstein's nephew or something, no you can't determine the exact ratio from the cylinder pressure. You could get lucky and come close but close don't count.

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