2ndgenteg-md

Just a quick question. I am building up a gsr for turbo, and I was wondering what the differences are, and how big they are between the different sized exhaust blades. Im leaning toward a .63, it seems to be the middle ground for a gsr, but what about the larger ones like .82 and bigger ? If anyone is running a larger one, or even a 60-1 t3, or a gt30 i am curious as to how much different they are. Also the host for this engine is a crx, so im thinking a large turbo will just make my go kart's wheels spin when it hits full boost anyway. if anyone has any input, it would be appreciated