he only way to know what your TRUE compression is to CC the Head chamber & piston chamber add thickness of head gasket then do the math. What companies advertise compression is far from accurate.
My Friend knows how to do the math Algebra ,trigonometry, calculus & has all the tools to CC.
I should learn the formula instead of letting him do it.
http://blog.jepistons.com/how-to-cal...d-displacement
SR66
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