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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Or my $15 compression gauge from Autozone is not accurate
