Evidently I did something very wrong when I used it, cu in came out right, but compression came out to 20.7............I have around 13.5
I don't have 2 measurements they require, top of piston ring to top of piston and center of main bore to block deck......I left t hose blank, maybe that's where it thru things off..........
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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Dave: 302 block deck height is 8.20". Piston top to ring is approx .150". This will get you in the ballpark. It is a good tool to have for enginie building reference, as it will show you how variables ( valve pockets, etc) affect actual compression..
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
I figured it out now, I had my +/- backwards on the piston ccs and the piston to top of block measurement, now it's showing 13.28, I'm not exactly sure on my dome piston ccs, so I used 15 ccs.........
Compression calculator
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