Underdrive Pulley
#17
Originally Posted by goldstar
Underdrive pulleys slow down alternator rotation and can result in reduced battery charging and headlight dimming, particularly if you install an upgraded audio system.
UR notes that the retreived power comes not just from underdriving the accessories (which requires less torque, hence the gain), but also from reduced inertia (i.e. less rotational mass) due to lighter material. In fact, the hp you gain back is more a function of the reduced weight than it is the smaller diameter.
#19
Originally Posted by meGrimlock
this car also being a daily driver; how's the effectiveness of the a/c, heating, defrost? negligable difference? will upgrading the battery help any?
-meGrimlock
-meGrimlock
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05, 2005, 3, aftermarket, auto, hp, intake, kit, manifold, mazda, mazdaspeed, mazdaspeed3, pulley, pulleys, pullies, reviews, underdrive
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