Underdrive Pulley

Reply Subscribe

Thread Tools

Search this Thread

Nov 26, 2005 | 02:42 AM

1sick'98WS6

Thread Starter

TECH Fanatic

iTrader: (19)

Joined: Jan 2005

Posts: 1,034

Likes: 1

From: Phoenix AZ

Underdrive Pulley

I was wondering if anyone could tell me if the 150+$ on a U/D pulley is really worth it, can you feel a big difference? what kind of times can it take off your quarter, and what does it do on a dyno

Nov 26, 2005 | 02:45 AM

Ws6man2000

TECH Resident

iTrader: (24)

Joined: Oct 2004

Posts: 839

Likes: 0

From: Ft lewis,Ft sill and thats all i hope.Katy texas

it will help you acclerate.....i noticed a diff with mine def worth it imo

Nov 26, 2005 | 09:08 AM

Kyle C

Staging Lane

Joined: Mar 2004

Posts: 87

Likes: 0

From: Sanford NC

I didn't notice any SOP difference. It does look nicer than the stock piece.

Nov 26, 2005 | 09:26 AM

freakynipples69

TECH Fanatic

iTrader: (3)

Joined: Mar 2004

Posts: 1,406

Likes: 0

From: NY

you'll gain about 5-10rwhp from it. I'd get it if you plan on doing a cam swap, or looking to get the most HP out of your car from just bolt ons.

Nov 26, 2005 | 11:53 AM

ULTIMATEORANGESS

TECH Senior Member

iTrader: (4)

Joined: Mar 2003

Posts: 10,985

Likes: 23

From: eatontown,nj

its a cheap mod that works but you wont notice anything major.

worth it imo.

Nov 26, 2005 | 12:00 PM

kazfan30

TECH Enthusiast

iTrader: (18)

Joined: Mar 2005

Posts: 654

Likes: 0

From: Hattiesburg, Mississippi

Not hi-jackin your thread, but what brands of these underdrive pulleys are you guys using to get the good HP gains? I have also been debating on buying one

Nov 26, 2005 | 03:11 PM

Kyle C

Staging Lane

Joined: Mar 2004

Posts: 87

Likes: 0

From: Sanford NC

SLP here. I wouldn't think there would be any difference in gain on 25% U/D regardless of brand. I chose SLP because of the high walls on the pulley, haven't thrown a belt yet.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Nov 26, 2005 | 08:52 PM

LS1-450

TECH Junkie

iTrader: (33)

Joined: Aug 2005

Posts: 3,783

Likes: 9

ASP here. I agree with all whom mention getting through the RPM's faster. Can also say that it is lighter than the stock pulley & smaller in diameter. Worth it.

Nov 26, 2005 | 10:42 PM

#10

Bearcat Steve

On The Tree

Joined: Nov 2001

Posts: 175

Likes: 0

From: Cincinnati, OH

It tends not to show up on a dyno, but it is consistantly worth at least 0.10 in the 1320.

Nov 27, 2005 | 10:04 PM

#11

1sick'98WS6

Thread Starter

TECH Fanatic

iTrader: (19)

Joined: Jan 2005

Posts: 1,034

Likes: 1

From: Phoenix AZ

thats good thats all i needed im going to get one after the lt headers

Nov 27, 2005 | 10:19 PM

#12

BLUE99T/A

12 Second Club

iTrader: (2)

Joined: Mar 2004

Posts: 182

Likes: 0

From: Fort Worth, Tx

Powerbond, here. Great and easy mod.

Nov 27, 2005 | 10:52 PM

#13

CRL 01 SS

TECH Enthusiast

iTrader: (4)

Joined: Apr 2002

Posts: 533

Likes: 0

From: Hoover, Alabama

I went with the Powerbond underdrive pulley when my cam was installed. The Powerbond is the same pulley that SLP uses, but it's cheaper. The Powerbonds are nicer than the ASP pulleys in my opinion. Underdrive pulleys are usually worth 5-10 rwhp on the dyno, and definately worth the money when you're trying to squeeze every bit of horsepower out of the car.

Nov 27, 2005 | 11:53 PM

#14

BackinBlack02SS

TECH Resident

iTrader: (7)

Joined: Feb 2004

Posts: 879

Likes: 0

Quote:

Originally Posted by Bearcat Steve

It tends not to show up on a dyno, but it is consistantly worth at least 0.10 in the 1320.

Don't take me the wrong way, but that doesn't make much sense. If it doesn't show up on a dyno, meaning you don't make any more power, than you won't go any faster. From my experience they are worth 5-10 rwhp and about a tenth and around 1 mph in trap speed. If you have a manual tranny, which has a factory idle of 800 rpm, a 25% underdrive cranky pulley will not effect anything negatively. Now if you have an auto, which has a factory idle of 550 I believe, you may run into charging issues. I say go for it.