This really has nothing to do with our engines, but more so with engines in general.

Is there a formula you can use that will tell you the ideal inside diameter of the primary collectors, using say... cylinder volume, compression ratio, and max RPMs? I would also need to know the ideal exit opening of the collector that the primary tubes come into, like in a 4-1 header and so forth.

I am working on some other projects for other cars and I was just wondering if anyone knew of any formulas....

Nikolas

1999 Mercury Cougar V6
KKM Intake,SVT TB, SVT Upper/Lower, 19lb injectors, Diablo Chip, MSDS Headers, Custom Exhaust, B&M Short Shifter, Progress Lowering Springs, 18" Axis TC's, OMP Strut Bar, AAM 24mm Rear Sway Bar, Koni Struts

15.09 @ 91.54(corrected, pre-SVT conversion, DiabloChip, and Injectors)