dj65falcon
Well-known member
Ok i have a paxton supercharger gss on my 300. When i bought it it has the 6 rib serpentine pulley on it. And it was rebuilt to put out 7 psi. Now the old pulley was 4 3/4". I called up paradise wheels. Told them what i had. Needed a twin v belt pulley. When i got it. It measures 5". I put a bov on it. It on a other topic on this forum.well anyway took it out and gor on it. Check my boost gauge and it only showing 4 psi. So i tighten up the bov more.and the same results 4 psi. So my question to you guys. Would a quarter inch differents on the pulleys, make me lose 3 psi? Any help would be appreciated