Yea you can run 11:1 with a SC or turbo but your motor will die soon after. What kind of car do you have? I have the 2.4. it currently has a 9:5 compression ratio. 9:5 is not too high if your gonna run low boost, but you should build your engine to suit your application. If you are gonna put a turbo in it and are planning on running high boost levels then you wanna lower the compression. I suggest you get block sleeves if your gonna run high boost. I myself am planning on getting a SC and i plan on running high boost, but the boost i will get out the super charger will not be too much too have to lower the compression. If you own a cavy your best bet is to get the GM super charger. unless you wanna build a one time down the track motor then you can throw in 13:1 and 20psi lol and sure it will be real fuckin fast but not for long.
