HP from new pulleys?
Le Mans Master
Joined: Jan 2006
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From: Butler Pa
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
Actually, there may be a little hp to be gained by going to a serpentine setup (requiring new pullies), as well as a 
factor.
You wouldn't feel the difference and it would probably take back-to-back dyno pulls to measure any difference.
factor.You wouldn't feel the difference and it would probably take back-to-back dyno pulls to measure any difference.
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Verdad Gallardo
Race Director
Joined: May 2003
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From: California
if you are going all out and dressing up the engine also they are nice. I have the under-drive pulleys on my 79, BUT I have after market 100-amp alternator, a VERY nice Aluminum radiator with duel spall fans and I am wanting every last bit of HP I can get. They are probably good for about 5-10 HP gain...MAX, but that is it, no more. They look very nice also.
but for the price, some ceramic coated headers would do a lot better for the $$$$ IMHO
but for the price, some ceramic coated headers would do a lot better for the $$$$ IMHO
Last edited by pauldana; Aug 31, 2009 at 06:28 PM.
Race Director
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Race Director
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I had the March UnderCool pullies on for while, lights go dim at stop lights too. Not a big seller anymore I hear 
Whole set is for sale for 100 bananas would work with electric fans a bigger alternator
Whole set is for sale for 100 bananas would work with electric fans a bigger alternator
Last edited by MotorHead; Aug 31, 2009 at 05:53 PM.