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#2
12-05-1999, 02:56 AM
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No can do. A compression gauge will not tell you what the compression ratio is since there are too many other things going on. The cam profile for instance has a lot to say about what the cranking compression pressure is as does the ring seal, the weather, the state of charge which the battery is in, and how good your starter is. If everything is equal, then higher CR will equate to higher cranking pressure but you can't derive it via equation. (well I suppose you could if you had a complex enough equation, but it would require a supercomputer to run on)
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#3
12-10-1999, 02:16 AM
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The compression gage is handy but its more of a dianostic too. It will let you know if you have a dead cylinder or weak compression on a cylinder. When you check cylinder compression with a compression gage its more important to look for uniformity in the readings instead of 'how much'.
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