is 11.2:1 compression too much for 91 Octane

Thanks for all the feedback, I'll see if I can dig up all the numbers on the custom ground cam. I feel it might squeek in at 91 octane, but it seems it would be pushing it. Any advantages or drawbacks to being at sea level?

Is there any way to easily up the octane of 91? haven't heard many good things about octane boosters... but haven't really looked into it either.