[brainsboy]

As one person suggested your cam is going to have alot to do with it. Looking at those cams you will never get away with an 11:1 compression, iron or aluminum heads, your cylinder pressure will be to the sky. Compression ratio is not as important as the amount of cylinder pressure you will develope. You can run 12:1 on the street at low rpms with no problems with a cam that has alot of valve overlap because the overlap keeps the motor from building alot of cylinder pressure, of course when you jump on it you will detonate but you can get my meaning here. In your case those cams are probably designed to build alot cylinder pressure at low rpms and would work best for 8.5 to 9.5, running 11:1 is looking for trouble.
I would say no more then 10:1 with those cams


Ben