4A-GZE MK1 Engine Supercharger questions [Archive] - Toyota MR2 Message Board

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Supercharger questions Being a new mr2 sc owner I have a few questions re the supercharger. 1. My mr2 has the bypass valve blocked, I believe this is due to sustain a higher boost level. Howcome there is a bypass valve fitted at the toyota factory in the first place? 2. How do I know if my supercharger has an upgraded pulley fitted? 3. What companies sell uprated supercharger pulleys and a matching belt?