Thread: Best Pulley
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      11-27-2012, 05:48 PM   #85
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Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

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Originally Posted by urBan_dK View Post
The Rogue and Macht Schnell kits provide a power steering pulley. If the pulley is larger than stock, it serves to further underdrive the power steering pump. If it is smaller, it restores the pump speed somewhat back to the factory specification. I just installed my Macht Schnell pulleys and didn't check to see the size difference.

It is erroneous to say the MS kit doesn't underdrive AC. since the crank pulley diameter is smaller for both belts, it must.
Thanks for the info. I am using the best information I can find. The table/summary/comparison is a work in progress and the document is editable by the community here. You can also simply send me diameters and I'll do the calculations.