Hey John H.,
Once again John Schweibert is correct. I don&#039;t remember what the variance is between wet and dry. Under optimum conditions, in theory there shouldn&#039;t be any, that would be because the rings would seal perfectly, I have never seen such a case in practice though. The closer the better. There is a formula that takes in stroke, bore, and compression ratio, and will give the workable pressures. I don&#039;t remember what that formula is, but next time I see my brother I&#039;ll ask him, he is an engineer and will remember it. Another thing I have used is iodine, about 1/8th inch on top of each piston, let that soak for an hour or so, then fill the cylinders with diesel fuel or ATF, which will wick in behind the iodine. There are several commercial products available at your local auto parts store to free rings, some folks like Seafoam, available from NAPA, I have never tried it, but have heard of good results in California. I have done well freeing stuck rings just by running the engine, then cooling it, you know, expand and contract. But, it does take time. You have enough compression to start and run, I think it will improve just by being run some, once you get the inside cleaned up.