11-05-2012, 12:29 AM
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#11
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Registered User
Join Date: May 2009
Location: Washington (the state)
Posts: 1,301
My Ride: 2003 325xi
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Quote:
Originally Posted by Kubica
^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.
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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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