I am getting a flat spot or boost loss while accelerating in 2nd gear, what is it?

[05MCSConvertible]

I just got a 15% pulley, I think I already had this problem (But not sure) before the pulley instal. Anyways, I will acclerate very hard in first and shift into second and let off the car for a split second for clutch/shift. When I get on it again in Second gear I seem to sometimes get a lost in boost and the car hesitates, but only for a second or two. It seems as though the car either has no air or loses boost and needs to spool up the supercharger again.
I have never owned or driven a supercharged car so maybe I am shifting to late as I shift at redline. Anyone have this problem.

[ButtonIt]

SHifting at redline is fine, no problems there. The supercharger doesn't need to spool up as it's driven by a belt so is constantly spinning at a rate relating to engine revs.

You'll probably find that the car is breaking traction slightly when you're hitting into second gear and the ASC or DSC is kicking in. Ususally this shows a flickering orange light on the dash, but both of my S's have done this without flashing the light before.

[RedUn]

asc by the sounds of it

[Revolution Mini Works]

have them check your supercharger by-pass valve

[roland2003]

Turn the asc off & see if it still does it.
Regards Roland GT Tuning

[05MCSConvertible]

It was the ASC, problem solved thanks a bunch guys.