I know what compression is and how it works, but my question is when you test it (which i have done to my 93 h23a1) is the number that you get...like 170...180.... the pressure(psi) at the compression stroke? I'm pretty sure thats what those numbers stand for.
Second question: ive been looking at h22's on ebay and some of them say they have been compression tested and LEAK DOWN tested or something like that. What is LEAK DOWN testing? what do they do in this process and what do the results stand for? Thanks for the input
