Had to get the supercharger replaced on my daily driver recently, but there seems to be a problem: The car has no torque anymore... Any moderate throttle pressure if the engine is below 2,500 RPM's will cause the transmission to downshift, the car stalls off idle trying to find a gear, and it just doesn't pull as hard as it used to.

Upon inspection, it looks almost as if the replacement supercharger has a larger pulley on it, which would explain the performance discrepancy, I'm sure. If anyone could tell me the diameter of the stock pulley (or better yet, post a picture of it), it would be much appreciated.

3inches... almost exactly