[fastratus]

Are there any superchargers for my 05 xb that are made that have an upgraded pulley that allows for more boost? or belt or whatever increases the psi for the charger

[elusive_xb]

i dont know but it is the pulley wheel

google it

i know if you find a smaller wheel it produces more boost

[crxgames]

I think the old Cooper S pulley would allow you to go up to 12psi. That's just what i've read though and I lost all the links regarding that. It's worth looking into.

[IowaSciontist]

I read that too. But 12 PSI would destroy a stock 1NZ. Better build it. The also make even smaller ones for the Mini to give it more boost, but that would put it at nearly 18psi on our motor. I tried to get ahold of greddy to see what size I could change to to get about 9 psi but they never return emails.

BTW, the Mini S runs the same supercharger as the GReddy kit, so the pully should bolt right on. Who want's to try it?

[crex149]

My Greddy s/c runs about 6-7 psi consistently, and on cool mornings/nights, spikes to about 9 psi. Don't hold your breath for Greddy to tell you what pulley you can change to to make more boost either. They aren't going to stick their necks out there and say "use this" and then you blow your motor or destroy your s/c.