Drivetrain Pulley size question
Pulley size question
I am somewhat confused. Lot's of folks here gush about the performance gains they get with a 15% pulley install. yet other posts have said that the MCS comes stock with a 14.2% pulley. I can't believe that 0.8% can make that much difference.
Have I missed something here?
Have I missed something here?
I am somewhat confused. Lot's of folks here gush about the performance gains they get with a 15% pulley install. yet other posts have said that the MCS comes stock with a 14.2% pulley. I can't believe that 0.8% can make that much difference.
Have I missed something here?
Have I missed something here?

The John Cooper Works kit included a 14.x% pulley.
A stock MINI Cooper S has a 10.5PSI pulley on it.
The % represent the reduction from the stock size...
A 15% pulley will get your boost to 14.5 - 15PSI
A 17% pulley = 16.5-17PSI
A 19% pulley = 18-19PSI
A stock MINI Cooper S has a 10.5PSI pulley on it.
The % represent the reduction from the stock size...
A 15% pulley will get your boost to 14.5 - 15PSI
A 17% pulley = 16.5-17PSI
A 19% pulley = 18-19PSI
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