11:1 too high for pump gas?

As an example, back in late 1989 we put together a bone stock '68 440-6pk motor for the '69 Cuda with a view of upping the CR to 12.5:1 later which never happened cos I retired from racing in 1991...Stock bottom end, 906 heads template ported 2.14/1.81, .039 fel-pro blues so scr was approx 9.8? we ran the CC .650/650 [email protected] SFT cam, working it out without any concrete actual numbers back then we had>
Static compression ratio of 9.8:1.
Effective stroke is 2.80 inches.
Your dynamic compression ratio is 7.57:1 .
Your dynamic cranking pressure is 148.77 PSI.
Your effective boost compression ratio, reflecting static c.r., cam timing, altitude, and boost of PSI is 7.57 :1.
V/P (Volume to Pressure Index) is 150
I do not have the exact Int valve closing point ABDC of that cam but inputted 68deg.

The motor made an on track 490 fly hp with a crappy Team G int, 4781 850DP and 2" hdrs and ran 10.7@125mph in a 3000lb car, idled at 900rpm and ran sweet, far from the best set up, but it worked and I would've gone 10.5's as I was killing the tyre and the 60 on the hit. CR is not everything, but it would've helped, shame we never got to try to see the difference.