I remember it was a trade off though. No oil squirters, but we ran forged pistons (can tolerate a little more det. than a std piston. I can trust my tuner not to blow the motor also.Very important.) If i remeber SK gets the piston crowns ceramic coated to keep det. down. 2 different things to consider about pistons, but if you have a good tune, like any engine needs, thats all that matters
You seriously doont need to worry about the lower comp. My turbo (as cubes said) comes on so hard it just wheelspins on boost -any gear)
Im going to end up with a gt3037 on mine, simply cos i wanna keep the power around 300rwkw. Even though everyone says it may be too small, and the gt35r is a better match. It should come on hard around 2500(?) which is only like an extra 1000 rpm from now with the highflow.
It'll be a great turbo for the street, and with a lower 3.9 diff ratio, itll be better