I have a few for sale
Will these pullys add hp?
Thread Starter
Safety Car
Joined: Jul 2008
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From: Made In America
St. Jude Donor '10-'11
Will these pullys add hp?
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
You ordered them without asking questions?
yes they will free up a little something. Not much but it will help.
It states on the link the answer to your question.
yes they will free up a little something. Not much but it will help.
It states on the link the answer to your question.
Last edited by cv67; Apr 12, 2010 at 10:03 PM.
Team Owner
Joined: Sep 2003
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
No these will not add HP, just like the 600HP stickers! 
But they will let the engine spool up faster, by reducing the drag from your belt driven accessories
But they will let the engine spool up faster, by reducing the drag from your belt driven accessories
Thread Starter
Safety Car
Joined: Jul 2008
Posts: 3,966
Likes: 4
From: Made In America
St. Jude Donor '10-'11
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St. Jude Donor '09 thru '20
boy I see those on a lot of ricers 
Pro
Joined: Apr 2008
Posts: 694
Likes: 1
From: Spokane WA
Yes it will reduce your 1/4 mile and 0-60 by about 0.2 seconds. And you might want to shop around. I bought a set that was black from ebay for less than $100. I think the pulleys were made by cat engineering.
Pro
Joined: Jun 2001
Posts: 520
Likes: 6
From: Elverson PA
Underdrive pulleys help a little for sure. It makes it easier for the engine to turn the accessories because of the gearing change. It's like changing gears on a 10 speed. It is easier to turn the crank, resulting in less parasitic loss to accessories and more energy to turn the flywheel. Every little bit helps, and that is just what this is... a little bit.
Pro
Joined: Apr 2008
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From: Spokane WA
like you.
Team Owner
Joined: Aug 2004
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From: Park City Utah
I mean, you CLAIM you have them on a car that I doubt you actually own....but we all know you've never tracked it or dyno'ed it. So....
Where did I claim stock LT1 (sic) going 12's? Please post where I said that.
BTW, I HAVE run UD pullies on some of my cars. And I HAVE tracked them.
Pro
Joined: Apr 2008
Posts: 694
Likes: 1
From: Spokane WA
You battery will read a little less than normal when at a stop light, I think mine reads 14.3 on the highway and when I stop it will read 13.9 not a big deal, and yes you can use them on a daily driver. Alot of people run them with no problems.
