Supercharger belt

Does anyone know how to tighten the supercharger belt...its slipping and im loosing boost someone help meee

It is possibly stretched, the wrong size, or the tensioner is going bad. Remove the belt and have the size checked with a guage at a parts store. If it is stretched then it will be too long. I would however believe that the tensioner is going bad and not holding enough tension to keep the belt tight replace it with a new one and the issue should go away.

Welcome to AF JuninGTP. Lynn is right. The supercharger has a spring tensioner that automatically adjusts tension. There is a good chance that the tensioner pulley bearing is going bad if the tensioner itself isn't separating at the pivot point, causing the pulley to drag while rotating. Worst case scenario, It's also possible if the car is high mileage, that the supercharger snout bearing is going out.