Sorry for the late reply, here are some answers to your question.
1. The car IS in the 2,200 lbs range, superchargers are much lighter than turbochargers, i think mine only weights approx. 50-70lbs, but don't quote me on that.
2. HP and torque - hence power, is very important, on the other hand, engine displacement is not so much any more these days.
3. On a cold day, I can do 5 -6 sec. (0-60) in the race track, worse in warmer summer days. (of course, my own timing is not as accurate as one hopes)