Quote:
Originally Posted by 94cobra69ss396
.070 isn't great but the Cobra is at .053 if I remember correctly. Even with the old 302 setup which had a compression ratio around 8.7-8.8 and a cam that had 110 LSA with 220 @ .050 it still cranked 150psi. Something isn't right. Does your car run good, sure. Could it run better, most likely.
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Ive been through 4 HG replacements, probably 10 intake manifold replacements, and 2 sets of piston rings. What could possibly account for a uniform loss of compression in all cylinders, that does not cause oil consumption, loss of mpg, or at least a significant loss of power, while persisting through all of those changes?
Quench alone shouldn't change a compression reading. 9:1 with a 110 should produce the same measurement no matter how that air is swirling around in there.
Guy, yes, compression test was the same before and after break in.