Send me your email and I will send you my excel file to calculate CR, it takes everything into consideration and is very accurate. Your accuracy will be based on actual measurement of the chamber volume.
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1967 Firechicken, 499", Edl heads, 262/ [email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.
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