I just checked it, and it read exactly on the 0. So I don't think it is the gauge.

I don't know if 12.5 psi on a supercharger pulls the same as 12.5 on a turbo, but if so, then I definitely know I'm not boosting that high, because my Talon is set at 13, and it pulls much harder than the Cobalt does right now, even tho I believe my Talon is a few hundred more pounds heavier. The 2 cars seem to pull about the same when my Talon reaches around 7.

 

mine is reading between 75 to 80 kpa but it is an 06