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underdrive power pulleys

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Old Aug 21, 2002 | 08:00 PM
  #1  
legenddrug's Avatar
legenddrug
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From: raleigh nc
underdrive power pulleys

Has anyone installed any underdrive pulleys in place of the stock pulleys?

99 Ford Expedition 5.4L 4x4
K&N filter
Magnaflow
Bosch Plat +4
 
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Old Aug 21, 2002 | 09:23 PM
  #2  
Petrol's Avatar
Petrol
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Joined: Dec 2001
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From: Virginia
underdrive power pulleys

I have not though I have read threads recounting stories of those who have.

Try a seach of the 'engines' & 'performance' forums.

BTW, how do you like the Magnaflow? which model did you get? is it si/do or single pipe? is it load or just a hint of added rumble?

sorry to creep off topic.

I would not recommend the pulley swap if you have a hi-powered sound system as a slower turning alt will leave you in need of current. I also would recommend against them if you tow regularly. Otherwise it's a great way to free up alittle extra power which is always a good thing.

You may also consider a dual 16" electric fan kit. they run about $250 and you could install it at the same time
 
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Old Aug 22, 2002 | 06:27 AM
  #3  
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legenddrug
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From: raleigh nc
underdrive power pulleys

I like the Maganflow. I just had the stock muffler cut out and the magnaflow put in still using the stock tail pipe. There is some interior resonance, but only on the drivers side. Its very mild on the passenger's side. Really gave it a nice sound and better mileage. About 1.5 mpg.
 
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Old Aug 22, 2002 | 08:42 PM
  #4  
Big's Avatar
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From: Fort Fun
underdrive power pulleys

 
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