Quote:
Originally Posted by stugray
Funny that atmospheric pressure at sea level is ~15 PSI.
CR of 12.5 means 15 X 12.5 = 187.5 PSI.
That should be the highest static pressure you can get unless cranking the engine with the starter gives you a dynamic CR higher than 12.5 (not likely).
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When I compression tested an s2000 my buddy was buying it came out around 220.
When you compress the air, it heats up, which further increases the pressure even more than just mechanically reducing the volume. The higher the compression ratio, the more heat adding to the pressure.