[justa6]

Your MPH is WAY down for having 12 lbs boost, IMO. Is your car Fuel injected? If so you might have to increase the size of your injectors. What is your fuel pressure going through the traps?

IMO, you need to find out why your engine is not putting out the power. Its either air or fuel but with 12 lbs of boost you shouldn't have an air problem. BUT if you don't have an equal increase in fuel it won't work. IF your engine is injected does it have a fuel pressure regulator that automatically increases fuel pressure as boost increases? If not that is your problem. Supercharged or Turbo engines have to have a method for the fuel to keep up with the airflow.

Power shifting is keeping the throttle wide open and making the gear change as quickly as possible. One NEEDS to have a rev limiter to safely do the above I've got mine set at 8400 which is about as High as I want to see the motor go if I "miss" the shift. Yours should be set to whatever RPM your valve train is set up for

Do you have a rev limiter? If not GET One it will save the motor ESPECIALLY a supercharged motor.

I'm sure others will have different opinions on where to start but if they don't have either Turbo's, Nitrous, or a Supercharger they may not know how the "enrichment" problem pops up compared to normally aspirated.

Hope this helps,