is 11.2:1 compression too much for 91 Octane

There are all kinds of variables in making a car run on hi cyl psi and pump gas, I think it's simply the load= car weight, gearing and engine effeciency. In my case it's a demon so it's somewhat light, 3.55 gear, and most importantly the 4,400 rpm stall. I have found running a very very cold plug also helps a lot, I run a NGK 9 I believe off the top of my head that's 3 steps colder than what a 70 10.5 cr 340 calls for, I do run a MSD 6al