Well since it's a belt driven blower, aka supercharger, the higher the RPM's are, the faster the turbines or screws in the supercharger are going to spin. The faster those spin, the more boost it should create. So I would imagine at high RPM's is when you're going to see the most boost.

When you unplugged the Boost Bypass Solenoid, did you just unplug the sensor? Or did you unplug the line coming from the snout side of the vacuum lines and plug it?