Standard or underdrive pulley? HP difference?
Thread Starter
Drifting
Joined: Apr 2012
Posts: 1,255
Likes: 90
From: Woodbridge Ontario
Standard or underdrive pulley? HP difference?
I'm changing the wobbly crankshaft harmonic balancer and pulley and was contemplating putting on an underdrive pulley. Is there a benefit?
Last edited by DDP; Jul 4, 2017 at 02:29 PM.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Unless you already have most of the other performance mods and are looking for that last .01 second bump in your 1/4 mile time, there's not a benefit for a UD pulley that outweighs the negative for your electrical system.
Race Director
Joined: May 2004
Posts: 16,667
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From: Raleigh, NC
St. Jude Donor '15
Agree, I would not do an UD pulley on these cars. They're already borderline (at best) at having enough amperage at idle to run all the electronics and fan in particular
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
It certainly wouldn't hurt, though I always wondered if the higher amp units were more difficult to turn or not, which would negate some of the gains. In the end it just doesn't seem worth it to me.
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