Originally Posted by ChevroletSS
Im need some help getting an idea what my CR is. Every calculator I use keeps giving me 1.39:1 and I dont know what Im doing wrong.
Chamber cc: 64
Gasket Thickness: .045
Head Gasket Bore: 4.060
Piston to deck height: 9.025
I DONT HAVE A HEAD GASKET YET I HAVE BEEN TRYING OUT DIFFERENT NUMBERS TO SEE WHAT WORKS BEST. i ALSO AM GUESSING ON THE GASKET BORE
Your piston to deck height is not 9.025
More like .025 depending on piston compression height and block deck height.
And chances are your running a DISH piston not a dome top, so you would need to enter +12cc for piston volume.
You need to measure piston to deck with a straight edge and feeler gauges at least, if you don't have proper tools.