Questions about boost gauge reading - advice?

[drbodzin]

Today, I fired up my car for the first time since installing a supercharger.

http://986forum.com/forums/performance-technical-chat/49610-installing-imagine-automotive-super-charger-my-1998-2-5-boxster.html

Here is a sample images of the gauge.



The Boost Gauge is reading Vacuum when at idle. I assume that's normal. When I increase the RPM, I do see the boost gauge increase the boost (REDUCE the vacuum), but its still in the vacuum range of the gauge. It's like there's less vacuum.

Does that seem normal for a supercharged engine?

I was thinking I should see the gauge in the boost range, not still in the vacuum range.

Am I correct to assume that without the supercharger, there would be MORE vacuum with increased RPM?

The boost sensor is installed with a "T" connection into the vacuum line the goes into the intake manifold after the throttle body (per the instructions).

Any ideas?