340 compression ratio

AJ/FormS said
FYI
4.06X3.315 is 703.3 swept, and
74 +8.9+12 + zero deck= 94.9 and
(703.3+94.9)/94.9= 8.4 , this is about worst case.

About best case with uncut heads might be
72+6.5+10=88.5 and
(703.3+88.5)/88.5=8.95
Did you do a compression test?

Man I just can’t get that math. I done some measuring last night and used summits “simple” calculator, I posted my findings below. Thanks for the input.