| Reduced Supercharger Belt?
Simple question i'm sure but not being familiar with the belt set-up of my R53 Cooper S just yet I thought i'd ask.
If reducing the size of the supercharger pulley with a 15% it is recommended to get a reduced size belt. If at the same time you add a 2% increased crank pulley should you still use a reduced belt or would that then make the stock one okay?
My guess is that the increase in the size of the crank pulley wouldn't really counteract the reduced size of the supercharger pulley & so a reduced belt would still be required?
Cheers
MAFFA | 
