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Old 11-05-2012, 12:29 AM   #11
White_Knuckles
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Join Date: May 2009
Location: Washington (the state)
Posts: 1,548
My Ride: 2003 325xi
Quote:
Originally Posted by Kubica View Post
^Its worked for me for many years/miles/races.

It's still a net increase in flow. Either mod alone works fine. I'm sure it's just Stewart covering their butt. I see no downsides. Tightens up the steering too.

Long as this has been tested then experience prevails. Underdrive may spin it down from rated flow closer to factory flow? Spinning it faster would be bad.

I found quality aluminum pulleys for under $20 each. Reusing the composite pump pulley has been reported that they sometimes crack when tightening. It's plastic that's been cooked from engine heat for months, seems probable.
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