speedyc43

Like the title states, when the car downshifts 5-4th it doesn't seem to have the same torque that it would have in 5th. If I really want some power it has to drop into 3rd. Sounds like the supercharger is blowing but not much happening. Doesn't throw any codes. The belt has been changed recently. And air filters are fresh. It almost feel like it's pulling timing, although I'm running 94octane. Any thoughts or tests I could perform would be appreciated.