Hey guys I recently put in a Craven 15% reductioner pulley in my R53 and love how it drives. I just was wondering if the car should be tuned after installing the pulley. My car is a daily driver and is only driven in a spirited manner every so often. No auto crossing, just cruising around and letting it open up a bit from time to time. I really like how it drives so I don't really need the increase in power from the tune. Just don't want to hurt the car by not getting it tuned if it should be. Thanks for your replies in advance.

 

not a requirement. the engine management system can adapt to the pulley, as it does not put any of the input signals "off the map"

cheers,

Charlie

 

With 15% a tune isn't required. It can help tie mods like exhaust intake and pulley together, but you'll be fine without it.