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underdrive pulleys

 
  #1  
Old 03-02-2011, 05:50 AM
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underdrive pulleys

ive been lookin at a set of underdrive pulleys, has anyone ever tried them are they worth the 46 dolars and do they help with the power, the one im lookin at are not aluminum
 
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Old 03-02-2011, 07:58 AM
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I have steel underdrives, I didn't use the alternator pulley though. But they did wake up the truck a lil. When I have my 33's on truck don't feel bogged down at all
 
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Old 03-02-2011, 09:38 AM
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thank you. i run 32" tires on mine and i just wanted to make shure that it was worth the money
 
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Old 03-07-2011, 06:40 PM
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why didnt you use the alternator pulley
 
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Old 03-07-2011, 07:16 PM
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I'm going to go out on a limb and guess that it's because a lot of times it works out fine, but there are many people out there that have had issues due to an underdriven alternator.
 
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Old 03-08-2011, 02:31 AM
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Go with the March power and amp series. Has a smaller alt pulley so you wont have any charging issues. They are aluminum. $99 from summit.

EDIT:

http://www.summitracing.com/parts/MCH-2215/
 
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Old 03-08-2011, 02:48 AM
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I have been thinking about a set underpulleys for my '91 5.8l efi.

When you use the March set of pulleys, do you use the same length fan belt? (I hope so or a couple of them will be on ebay soon!)

cheers
 

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