A compression ratio of 11:1 yields a maximum 161 psi compression measurement (11 times the atmospheric pressure of 14.7psi).
**EDIT**
It seems that the conversion from compression ratio to expected PSI and how the actual measurements are taken is quite complicated and not at all straightforward. Hence, I am not sure about my statement above. Will investigate further.
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Last edited by thstone; 05-02-2012 at 09:19 AM.
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