L67 Swapped Supercharger Tensioner (Page 1/1) jhobbins APR 17, 07:18 PM hey guys, I have an 87 gt that I bought with the swap mostly done. The motor is a 99 gtp motor. I noticed there is alot of slack in the supercharger belt, which I believe is causing my high rpm misfire. Is the tensjoner pulley adjustable some how? Or is it likely the internal springs are shot? Thanks in advance Lou6t4gto APR 17, 07:38 PM one of you tensioner pullies Should be "Spring Loaded", or the belt is too long.