Underdrive Pulley
#7
Staging Lane
Join Date: Mar 2004
Location: Sanford NC
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SLP here. I wouldn't think there would be any difference in gain on 25% U/D regardless of brand. I chose SLP because of the high walls on the pulley, haven't thrown a belt yet.
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#13
TECH Enthusiast
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Join Date: Apr 2002
Location: Hoover, Alabama
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I went with the Powerbond underdrive pulley when my cam was installed. The Powerbond is the same pulley that SLP uses, but it's cheaper. The Powerbonds are nicer than the ASP pulleys in my opinion. Underdrive pulleys are usually worth 5-10 rwhp on the dyno, and definately worth the money when you're trying to squeeze every bit of horsepower out of the car.
#14
Originally Posted by Bearcat Steve
It tends not to show up on a dyno, but it is consistantly worth at least 0.10 in the 1320.