I just posted this same reply at that thread:
It really depends on what your preference is. Personally I keep mine at 35-40lbs (I keep the pressures even from side to side) for average driving, and when I go to the track I run 32 lbs. in the drivers side and 40 in the passenger side. It keeps the car pretty level when leaving the line, and got rid of most of my wheel hop. I've been using them this way for a little over 3 years now on 2 different MN12's, and I'm very happy with the air bags. I have yet to have one fail ........ knock on wood.
-Rod