You did not specify your elevation, and I do not see what heads you are running, but, with an Ica of 72*, and at 1000 ft; I got this off the Wallace
Static compression ratio of 11.82:1.
Effective stroke is 2.92 inches.
Your dynamic compression ratio is 8.90:1 .
Your dynamic cranking pressure is 182.42 PSI.
V/P (Volume to Pressure Index) is 162
So IDK how you got your numbers.
To get to 7.42 dynamic I have to fudge the numbers to
Ica of 76* and Scr to 10.22
Static compression ratio of 10.22:1.
Effective stroke is 2.80 inches.
Your dynamic compression ratio is 7.45:1 .
Your dynamic cranking pressure is 143.69 PSI.
V/P (Volume to Pressure Index) is 123
123 is pretty weak
For a 408 to have 11.42Scr, the total chamber size needs to be 80.2cc.
For 10.22, it is 90.64
