My advice would be to get your MINI running properly & checked out before adding a pulley. At 98K it is most likely OK, but you'll want to be sure before putting more load on it. I've been running a 15% pulley for about 90K. So far so good.

 

it feels like just above 3k rpm is when it actually responds good to me, so have the spark plugs replaced....any other suggestions?

 

Plug wires....

 

Starting to pull good at 3000+ is pretty normal...
the airflow is cooling the ic....and the motor gets into it's tourque band...below 3000 the ta is kinda limited....a tune helps a bit..

 

Great post!

I've been researching the ALTA 17% reduction and 15% reduction pulley. Seems like an easy mod but knowing about the revs and ideally switching to the JCW spark plugs is a good FYI to know.

What are the "good to know" items about supercharger pulleys and "should definitely have done/upgraded" so you don't damage the car bits of info??

Thanks!

 

15% is popular, but since I don't live at red-line, I went for the 17%. it can be harmful if this is a pure track/autocross toy, but for the daily driver, with occasional run to red-line, I found it was a perfect match.

That said, it really became a huge difference after a tune...