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ASP Underdrive pulley
Reviews Views Date of last review
3 6556 Fri February 15, 2008
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Recommended By Average Price Average Rating
67% of reviewers None indicated 6.3
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Description: UDPs for other applications have been around for about a decade. UDPs allow a motor to produce more power by freeing up power lost to parasitic drag. For dollar value, many think UDPs are one of the best mods for HP gain on the market today
Keywords: UDP, underdrive, pulley


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aldive
Elite In Memoriam


Registered: January 2001
Posts: 25263
Review Date: Fri January 27, 2006 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

 
Pros: High quality
Cons: None

A replacement underdrive ( 25% ) crank pulley/harmonic ballancer.

Extremely well made.

Company website is not up to daye.

They are aweful ar responding to e mail.

------------------------------
Al Franklin

My truck

My Quest for 30

RIP Al Franklin! 1947-2010. Gone but not forgotten!

 
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Premierexplorer
Wannabe Elite Explorer

Registered: December 2004
Posts: 92
Review Date: Tue April 17, 2007 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

 
Pros:
Cons:

I put one of these on my OHV. I have no charging problems and it works well. I average slightly better gas mileage compared to the stock pulley.

------------------------------
2007 Eddie Bauer 4.6

 
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Viggen
Wannabe Elite Explorer

Registered: October 2007
Posts: 40
Review Date: Fri February 15, 2008 Would you recommend the product? No | Price you paid?: None indicated | Rating: 1 

 
Pros: when working properly, frees up a nice amount of hp
Cons: poor quality, did not meet stock pulley configurations

Had this ASP udp on for about 2 months, then began feeling a rumbling noise. Noise got worse and worse and finally had codes thrown. Dual misfires caused me to bring the truck to Ford, where after a boat load of tests were performed, it was found this thing ate up my crank key. It was found out that this had a substantially smaller diameter, and therefore wobbled around the assembly. This wobble caused the damaged key and misfires. I have yet to send it back to ASP because I'm sure they will say nothing is wrong with it, and that it was put in wrong.

 
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