86MCSS

I have an eaton M45 unit from a mercedes SLK roadster I believe. I had some questions about it and was hoping you guys and gals could help me out. Its for a custom application. The engine is a 2.2 4 cyl. which is very similar to the engine this unit was on. I was wondering..

What is the factory boost level at?

What size is the crank pulley for this unit that gives it, its boost level?

Can I change the blower pulley?

I basically need to know what size pulley will give me 8lbs of boost and if the pulley on the supercharger can be changed.

this is like the unit I have:
http://cgi.ebay.com/ebaymotors/ws/eB...sPageName=WDVW

I hope you can help me out. THANKS!

EDIT: Am I right to understand that the bigger the crank pulley the more boost the supercharger will make?