I bought a 07 Phazer, supercharged. Took it for a few rips- not far as we have not much snow, and it would hit about 10lbs of boost then drop to 5. Did a pressure test and found the throttle bodies were out of boots. Fixed that, tested again- air box had a small crack in weld. Fixed that- all good. put it all back together, and went for a short blast. What a difference. Half to 3/4 throttle- boost was a 15lbs. Is this too much for a Phazer? What kinda hp would it be?