Do these Dynamic CR values really indicate how well the particular combinations would handle 93-octane fuel?

1. Assume closed-chamber heads w/ .040" quench.
2. Dynamic CR calcs using http://www.wallaceracing.com/dynamic-cr.php
3. Intake Closing calculations using SAE duration (.006” valve lift)

The street roller cam to be used in my 448 w/ 11.0 CR:
298/304 on 108 + 0 ==> Intake Closes at 77 ABDC ==> 7.78 DCR
298/304 on 108 + 2 ==> Intake Closes at 75 ABDC ==> 7.94 DCR

The solid flat-tappet cam used in my 452 w/ 10.8 CR:
302/302 on 108 + 2 ==> Intake Closes at 77 ABDC ==> 7.64 DCR


Last edited by Blew My Budget!; 12/21/10 11:32 AM.