Quote:
A bleed down test uses a faux sparkplug or a simular fitting to allow you to pump the combustion chamber full of air on the compression stroke, a valve that can be shut off, to maintain the pressure, and a gauge that shows how much pressure the chamber can hold and (timed) how long before it all leaks out. Ostensibly more accurate that a comp test. The simple test you are referring to, is still a good first start. Your looking for your readings to be within' (I'm guessing here) 3-4 lbs. On cars motors, the books usually say 5 lbs max variation.
OK I got the wrong idea. I thought you meant a compression test in a dry chamber as a base line and then a second test after squirting in a bit of oil. I assumed the oil would temporarily seal any poorly fitting ring. A significant increase in compression in the second test would indicate a problem with the rings. Obviously that is not what you meant, but would it work?
Cheers, Richard
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09 America, Staintune Pipes, K&N, Breathe, Hagon Nitros, AI & O2 removed, tune 20184 (modified), MTX-L a/f gauge
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