underdrive pulleys

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Mar 2, 2011 | 05:50 AM

deljac

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From: Lincoln, Ne

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

Mar 2, 2011 | 07:58 AM

cadillacmob

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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

Mar 2, 2011 | 09:38 AM

deljac

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From: Lincoln, Ne

thank you. i run 32" tires on mine and i just wanted to make shure that it was worth the money

Mar 7, 2011 | 06:40 PM

deljac

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From: Lincoln, Ne

why didnt you use the alternator pulley

Mar 7, 2011 | 07:16 PM

zxwut?

Fleet Mechanic

Joined: Jan 2009

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From: Fort Worth

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.

Mar 8, 2011 | 02:31 AM

86F150302

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Joined: Dec 2007

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From: Jacksonville FL

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/

Mar 8, 2011 | 02:48 AM

Uncle Grumpy

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Joined: Sep 2008

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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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