Hi all,
I am wanting to install an upgraded supercharger pulley on my 2001 XKR. There are so many to choose from, anywhere from 6% to 12% boost. Some need machining some don't...what pulleys have you all purchased and what are the best brands? I don't want belt slippage, just a quality pulley. Machining not a problem.

Thanks!

 

I only ever did one for a customer and he got the larger crankshaft/damper pulley.(got it from the U.K.)

It did 'pull' very hard at low RPM. Did not try highway speeds, just a quick test drive.

 

I would prefer to upgrade the lower pulley, but I cannot figure out how to remove the crank pulley...and then re-torque it to the 300-something ft lbs it needs to be at.

 

Stainless steel pulleys are much better than alu pulleys regarding belt slippage.
I bought my lower bigger pulley at Powerhouse.uk.
They have +6% and +10% upper pulleys, and +18% lower pulleys for sale at their webpage.