Underdrive pulleys

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Mar 11, 2003 | 07:01 PM

bachehbad

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Joined: Mar 2003

Posts: 166

From: Kitchener

Underdrive pulleys

Who makes a good one, and how much gains do they give????

I'm looking for mods to increase performance while keeping fuel economy as it was before the mod!

Mar 11, 2003 | 07:21 PM

leadfoot94

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Joined: Feb 2003

Posts: 595

From: Michigan

I know that March makes a set of aluminum for the Crank and Alternator for like $104 from Summit, and I heard there was only like an increase of 1-2 Horsepower, and like 5 RW-Torque.

Mar 11, 2003 | 07:27 PM

teke184

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Joined: Sep 1998

Posts: 8,319

From: US 1 Mile Marker 52 in the Florida Keys

i think ASP makes the most "underdrive" with thier 34%. most of them will give you the same results. don't look for a big increase.

ws6.com did a dyno run with there, check it out

Mar 11, 2003 | 07:35 PM

xxsaint69x

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Joined: May 2000

Posts: 2,889

From: Peachtree City, GA

from what i heard they are waste of time and money on LT1s..now if u had LS1, u might actaully gain few ponies.

Mar 11, 2003 | 07:45 PM

leadfoot94

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Joined: Feb 2003

Posts: 595

From: Michigan

Quote:

i think ASP makes the most "underdrive" with thier 34%. most of them will give you the same results. don't look for a big increase.

Yep, March's have 25% underdrive.

Mar 11, 2003 | 07:55 PM

scoobie30th

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Joined: Feb 2003

Posts: 107

From: Hawaii

I have the ASP underdrive pulley. I couldnt tell you if i gained anything from it though. But i did see a dyno once where the person gained around 4 HP average throughout the powerband with a similar pulley.

Mar 11, 2003 | 08:42 PM

bachehbad

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Joined: Mar 2003

Posts: 166

From: Kitchener

hrmmm not so great huh, def not worth 100 bux... if i find it on sale i will def pick one up though because i heard they also increase fuel economy by a tad...

Mar 12, 2003 | 01:30 AM

chesee48

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Joined: Dec 2001

Posts: 3,674

From: Chicago, IL

Quote:

Originally posted by bachehbad
hrmmm not so great huh, def not worth 100 bux... if i find it on sale i will def pick one up though because i heard they also increase fuel economy by a tad...

Defently not worth the 100.00

Mar 12, 2003 | 01:32 AM

stik6shift98

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Joined: Mar 2002

Posts: 4,254

From: Darien, IL, usa (Chicago W.Suburbs)

Quote:

Originally posted by scoobie30th
I have the ASP underdrive pulley. I couldnt tell you if i gained anything from it though. But i did see a dyno once where the person gained around 4 HP average throughout the powerband with a similar pulley.

i have seen a dyno with 7 hp on an lt1 and 10hp dyno on ls1

Mar 12, 2003 | 01:49 AM

#10

chesee48

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Joined: Dec 2001

Posts: 3,674

From: Chicago, IL

Quote:

Originally posted by stik6shift98
i have seen a dyno with 7 hp on an lt1 and 10hp dyno on ls1

Yea i've heard up to 10 on the lt1's too, but ive heard less.

I still think its not really worth it, but thats me. Some people love them here on the board, some dont. So its all about matter of opnion.

Mar 12, 2003 | 05:49 AM

#11

snakeatinZ

Registered User

Joined: Jun 2001

Posts: 1,456

From: WaTaUgA, Tx

I have a bran new one from Excesive motorsports that ill sell ya for 40.00+ shipping? comes with bolts and the surpintine belt. Let me know if you are interested!
Steve
shibby28@yahoo.com