Gauge is bad if all low, 95 psi usually.

Posted by Chris Case [75.36.44.142] on Monday, March 18, 2013 at 18:32:54 :

In Reply to: tT137 230 cid compression posted by jock maclean [173.164.196.73] on Monday, March 18, 2013 at 16:08:54 :

Because gauges vary so much, normal spec is that low is within 10% of high.

And I'll add that a 'wet' compression test is a waste of oil. I judge rings by 'blow by'. If the crank vent system is puffing like a steam engine, it needs rings.

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• Wet test - Sherman in Idaho 20:59:53 03/18/2013

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