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10-15-2012, 02:32 PM
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Registered User
Join Date: Oct 2011
Location: phoenix, az
Posts: 508
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454 Compression Testing?
I did a compression test on my mid 70's 454, I would bump the engine to get one compression stroke and I got around 90 psi per cylinder but if I turn the engine over to get 3 or 4 compression strokes they all levels off around 100 -110 psi per cylinder! So my first question is, is the 90 psi the true compression reading? Second question is, if my valves are out of adjustment will I still get the same compression readings?
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