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07-20-2003, 11:10 PM
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#1 |
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Senior Member
Join Date: Apr 2002
Location: Beaverton, OR
Posts: 1,615
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Underdrive Water Pump Pulley Question
What are the disadvantages or advantanges in using a underdrive water pump pulley? The reason is that I found a nice March aluminium billet 2 groove pulley, but it's a 7" underdrive vs. a regular sized one. Only thing I know, it will turn the water pump slower.
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Mitch 1978 Chevrolet Silverado C 10 454 BB, TH400 |
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07-20-2003, 11:22 PM
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#2 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,748
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Underdriving the accesorys will increase HP, but it will slow down your water pump which means less cooling.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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07-21-2003, 03:53 AM
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#3 |
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Senior Member
Join Date: Mar 2003
Posts: 2,499
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A Winston Cup team did a little testing on pumps a few years ago and found the best cooling comes from turning the pump faster.............ie:increasing flow.
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