Quote Originally Posted by DennyW
The amount of compression you have, is, and will be your the compression ratio at that point in time. In other words, if the compression is lower, but all even, and the engine runs good, you can estimate the compression ratio for the lbs of compression you show.
sorry , you cannot tell c.r. from a pressure test . example i have a smallblock 350 compression test said 125lbs , new motor 9.5 to 1 . i also had a 540 with 130lbs , new motor 15.0 to 1 . because the 540 had a camshaft that had a lot of overlap it released cyl. pressure .