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snowman snowman is offline
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Join Date: Feb 2003
Location: So California
Posts: 3,787
Actually you can measure the air pressure and determine the compression if the rings and valves are in good condition. Just use a normal compression tester. Not highly accurate but could be good for determining if its 9:1 vs 11:1.

Since the cam can mess up the reading comparing the numbers with known good engines could still solve the problem.

I think the Nascar stuff only gives the displacement, not compression ratio.

And if the engines not in a car,, why NOT put a piston on TDC, compression and fill it with a light weight oil from a calibrated syringe?

Last edited by snowman; 03-31-2005 at 02:23 PM..
Old 03-31-2005, 02:16 PM
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