Hi there folks, im new in this forum.
Im looking for some help in to my 1997 grand prix GTP i have a few modz, PCM reprogram, 3.25 pulley, resently engine overhaul, modded intake, modded SC.

But my problem its that my supercharger only trows 5 psi of the 10 psi, that the 3.25 pulley produces.

Can anyone help me with my problem? i dont know what happened.

Thanks a lot