911SC Compression Test Values
#1
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What should the cylinder compression test value be for a 1978 SC, US spec 3.0 with 8.5 to 1 CR? I know the leakdown tests are preferred, but a compression test is quick and simple. I also know that the range of values between cylinders is important, but I'm interested in what "new" engine values should be.
#4
Race Car
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Throttle held wide open won't make a difference. The previous values suggested are right on the money...a leakdown test will be much more rewarding from the "informational standpoint"...but you'll need a decent air compressor.
Often I yielded a 160-180lb reading from my SC motor, 9.5:1 pistons...but once I got a 70!!
That cost me a few sheckles.
Often I yielded a 160-180lb reading from my SC motor, 9.5:1 pistons...but once I got a 70!!
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