L98 pullys

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Aug 11, 2015 | 12:57 PM

Corvette72151

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L98 pullys

Has anyone out there used an underdrive pully setup on an L98 ? I have a 91 with a few mods and was considering either a March or a Jet pully kit. Any advice would be very helpful. Thanks folks .

Aug 11, 2015 | 01:40 PM

BOOT77

Melting Slicks

Joined: Nov 2010

Posts: 2,216

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From: Michigan

I used a march crank pulley and can't rem who's alt pulley, then deleted my AC, smog, idler and put a standard rotation pump on. I'm still deciding/testing if the alt pulley is gonna work out. I get 12v in gear, 13v idle, 14v cruise.

Aug 11, 2015 | 02:26 PM

l98tpi

Max G’s

Joined: Nov 2008

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From: Monroe OH

NCM Sinkhole Donor

If you have a 91 get the March 3 piece set up and you will be happy! Decreases parasitic loss.

Aug 11, 2015 | 04:36 PM

Corvette72151

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Pullys

What difference should I notice. Is it worth the $235.00 ?

Aug 11, 2015 | 05:10 PM

BOOT77

Melting Slicks

Joined: Nov 2010

Posts: 2,216

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From: Michigan

If you wanna notice something get a nitrous kit it'll be much better bang for buck.

Aug 11, 2015 | 07:46 PM

ex-x-fire

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Joined: Dec 2009

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I always thought those underdrive pulleys were a gimmick.

Aug 11, 2015 | 10:59 PM

l98tpi

Max G’s

Joined: Nov 2008

Posts: 2,751

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From: Monroe OH

NCM Sinkhole Donor

Quote:

Originally Posted by Corvette72151

What difference should I notice. Is it worth the $235.00 ?

Yes, they are worth it.

Quote:

Originally Posted by ex-x-fire

I always thought those underdrive pulleys were a gimmick.

Honestly, they are not a gimmick. It decreases parasitic loss from accessory pulleys.

Aug 11, 2015 | 11:33 PM

Cliff Harris

Race Director

Joined: Apr 2002

Posts: 10,036

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From: Anaheim CA

How much is the parasitic loss? Somebody told me the A/C compressor uses 4 HP. Decreasing that by 10% or 15% is negligible.

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Aug 12, 2015 | 12:10 AM

JrRifleCoach

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Quote:

Originally Posted by Corvette72151

What difference should I notice. Is it worth the $235.00 ?

1. A little bit.
2. Not really.

If your spending time at the drags it may help some.
For a street car, forget it.

Aug 12, 2015 | 11:17 AM

#10

THE 383 admiral

Melting Slicks

Joined: Sep 2010

Posts: 2,422

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I would look for a used set. Unfortunately you cannot not pop the hood to show off the great looking pulleys. Like a F-body or similar.

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