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For a minimal amount of money, the MINI Cooper S Supercharger Pulley can make even the Monday commute seem like a run around Laguna Seca. The stock pulley is one of the first things BMW MINI Cooper S owners replace to increase the performance of their car. Changing to a 15% smaller supercharger pulley on an otherwise stock motor has been shown, through independent testing, to provide increases of 15-20 horsepower with similar increases in torque.
The smaller supercharger pulley causes the unit to spin faster and create more boost. More boost=bigger grin! Stock Mini Cooper S engines will see a 3-4 pound increase in boost. Add to that a modified intake or exhaust and your Mini Cooper S will have even bigger power gains. MINI Cooper S tuners, including the venerable John Cooper Works, have extensively tested the 15% reduction supercharger pulley and found it to be ideal for street and track use.
Included is an installation CD and tool that with a moderate amount of mechanical ability makes installing the supercharger pulley the ideal weekend project. We've been told that it makes a great gift for the Mini Cooper S Enthusiast too.
For the even more adventurous, changing to a 19% reduction pulley will have the boost kicking in 750rpm sooner than the 15% pulley.
The 19% Mini Cooper S Supercharger Pulley is ideal for street driving conditions ONLY! It is not recommended for the long high revving situations typically seen on the racetrack! Sustained 6000-7600rpm generates more heat reducing the 19% pulley's effectiveness.
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