Originally Posted by ssmonty
7.5-8:11 CR would be a good compression to shoot for if your using a blower.
Forged pistons are a very good idea. You'll also want to get a cam designed for use with a blower, as they generaly have a wider LSA.
You ought to do some research on the torque capacity of the Jag rear end you have. I can't say from experiance, but from what I've read and heard, putting one behind a blown motor may not be a good idea. Jag engines are not really known for producing high torque.
I agree with the 7.5:1 to 8.0:1 static compression ratio with a blower. That will allow you to push 8 lbs of boost into the motor on pump gas. I see the cam LSA differently though. Blower Drive Service says you can use a wider LSA on ALCOHOL, but 110 works best on gasoline.