Here are some preliminary numbers, all cams installed at split overlap
First the factory 5.2,
Static compression ratio of 9.2:1.
Effective stroke is 2.89 inches.
Your dynamic compression ratio is 8.07:1 .
Your dynamic cranking pressure is 161.70 PSI.
V/P (Volume to Pressure Index) is 133 .
Notice the cylinder pressure is already at the max for pumpgas, and the VP index is pretty good. You're not gonna improve much on this for your application
Next the factory 5.9
Static compression ratio of 9.2:1.
Effective stroke is 3.02 inches.
Your dynamic compression ratio is 7.80:1 .
Your dynamic cranking pressure is 154.70 PSI.
V/P (Volume to Pressure Index) is 139.
Again pressure is pushing the limit, and VP is getting up there.
Next; the 5.9 with a 5.2 cam
Static compression ratio of 9:1.
Effective stroke is 3.13 inches.
Your dynamic compression ratio is 7.93:1 .
Your dynamic cranking pressure is 158.06 PSI.
V/P (Volume to Pressure Index) is 148
Notice I dropped the Scr, again still pushing the limit, and the VP is now a nice big fat number.
