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Old 04-11-2012, 05:47 PM   #137
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Join Date: Aug 2009
Location: St Louis, MO
Posts: 3,008
My Ride: 01 330x-xi
Originally Posted by TrippinBimmer View Post
Since, S/C is added to the Combo. Adding an underdrive waterpump will cause the engine not to maintain cool correctly. Underdriving the Alternator is OK if u not a ICE junkie. Other then that, I dont see it is worth 180 bux to have. Rather spend that money else where that matters.

Tested or theoretical? I see people using them on turbo apps all the time. The water pump is spun much faster than needed. If you spin a pump that can only move x amount of volume at million rpms it still only moves what it was designed to move. I am in no way saying you aren't correct. Does anyone have some hard facts to back this? Does AA inform you not to under drive the pump?
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