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Post: Dynamic CR and Cranking Pressures

BigChevyLover
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Posts: 123

Reg: 01-20-10

06-08-12 01:18 PM - Post#2234819

Three quick question (before ordering pistons) ...

1. Is a DCR between 7.8-8.0 too high for pump gas with aluminum heads? What would be an ideal DCR?

2. Is a "calculated" cranking pressure of 195 too high for a street car with aluminum heads? What would be an ideal Cranking pressure?

3. Do I subtract 14.7 from the calculated cranking compression to get an idea of what my "actual" compression ratio will be?

For example: I have an online calculator showing a cranking pressure of 195. Is this an an actual cranking pressure of 180.3 psi?

Edited by BigChevyLover on 06-08-12 01:40 PM. Reason for edit: No reason given.

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