Anyone using underdrive pulleys
Thread Starter
Intermediate
Joined: May 2019
Posts: 45
Likes: 7
From: NC
Anyone using underdrive pulleys
Is anyone running underdrive pulleys on their C5? Can anyone recommend a good brand of underdrive pulleys, or an online vendor or sponsor to purchase them from?
I'm really interested in doing eco friendly mods that improve fuel mileage, reduce emissions, and improve power.
I'm really interested in doing eco friendly mods that improve fuel mileage, reduce emissions, and improve power.
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 235
From: Bangkok, Thailand
I also used the Powerbond 25%'r on my 99. With that, a Flowmaster cat-back, Billy Boat shorty headers and LS6 intake steady state mileage improved significantly. Up from 33.6 dead stock to just over 37 @ 65mph. Over 41 cruising at 55.
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 235
From: Bangkok, Thailand
Honestly, I don't understand why anyone would go through (or pay for) the work needed to replace it and NOT use an underdrive unit. It's free power, reduced wear on the driven accessories and no negative effects.
