Convert Compression Ratio to PSI?

Answer

There is no true way to convert compression pressure to PSI, or pounds per square inch, because the engine is not a perfect environment. Theoretically, a 1:1 ratio in compression pressure is equal to zero PSI. However a 2:1 ratio is 14.7 PSI, so you should be able to divide the PSI by 14.7 to get the correct compression pressure ratio. Unfortunately, because engines run differently when hot or cold, and air may bleed out of the valves, the ratio cannot be guaranteed.
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Q&A Related to "Convert Compression Ratio to PSI?"
A 1:1 ratio is equal to 0 PSI. 14.7 PSI is equal to a 2:1 ratio. Just multiply your ratio by 14.7 to get PSI, or divide PSI by 14.7 to get ratio. This is only in a perfect cylinder
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