is 11.2:1 compression too much for 91 Octane

I have no idea what that is or how modern.

Off the cuff I'd say no except the cam is a unknown. If the cam is really large in duration, hou may, may get away with it. You may, may have to find yourself a very thick head gasket to run at a slight less compression ratio.

Ferrari 458 Italia

http://en.wikipedia.org/wiki/Ferrari_458


Super sorry I had that wrong, it doesn't have 13.5 to 1 compression, it has 14 to 1 compression! It's a very amazing motor that is used in the 458 Italia Speciale.