Underdrive pulleys

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Sep 24, 2007 | 09:07 AM

ChampionN84

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Joined: Jun 2004

Posts: 128

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From: Freeland, PA

Car: 91 Camaro Z28

Engine: 305 TPI

Transmission: 700R4

Underdrive pulleys

This might sound stupid but what do underdrive pulleys do?

Sep 24, 2007 | 10:17 AM

formula_novice

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Joined: Sep 2003

Posts: 988

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From: St. Louis, Missouri

Car: 1989 Firebird Formula

Engine: 383 Stealth Ram

Transmission: 700R4

Axle/Gears: 3.73 9 bolt Posi

Re: Underdrive pulleys

From the summitracing.com website...

"By reducing the speed of the accessories, these underdrive pulleys free up an average of 8-15 hp"

Do a search for further info.

Hope this helps.

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