Dr, Mark,
I don't think your test indicates a need for new rings. Test 1 (dry)
indicated a less than 10% variance from the highest reading. That's right in
the ballpark for a decent (if not perfect) engine. Usually, the wet test is
only done after a car fails the dry test. If there's good improvement with
the wet test, it indicates that you need new rings, rather than a valve job.
The larger variations after you added the oil are probably due to variances
in the amount of oil added....
In short, 165-170-173-180 is a very good reading for a TR!
I would look for something else -- like a carburation or ignition problem.
Really!
Good luck!
Chris L.
'66 TR4A
http://members.aol.com/lilljaweb/index.html
'74 850 Norton Commando
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