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Supercharger pulley upgrade

3K views 3 replies 4 participants last post by  usiny 
#1 ·
Does anyone have any rough idea on the increase of power that will be gained from a stock r53 with a 17% reduced pulley? Its had most of the engine rebuilt so the engine is spot on and running like new, ide upgrade the filter and plugs also, i just wanted a rough idea on what the gains are goin to be before i go ahead and do it


Thanks :)
 
#2 ·
Claims are made for 30-40 wheel HP increases for a 15% undersized pulley with no other changes (induction or exhaust); no idea if they are supported by any evidence, so take it with a pinch of salt!
 
#3 ·
Does anyone have any rough idea on the increase of power that will be gained from a stock r53 with a 17% reduced pulley? Its had most of the engine rebuilt so the engine is spot on and running like new, ide upgrade the filter and plugs also ...
The reduction pulley should put your MINI at between 190 and 200 bhp.

You'll need to fit colder spark plugs and a smaller belt with the pulley.
 
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