1sick'98WS6

iTrader: (19)

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

Ws6man2000

iTrader: (24)

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

Kyle C

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

freakynipples69

iTrader: (3)

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.

ULTIMATEORANGESS

iTrader: (4)

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


worth it imo.

kazfan30

iTrader: (18)

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

Kyle C

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.

227Hawk

iTrader: (1)

Using ASP, did change w/ other mods so it's hard to say what added what gain.

LS1-450

iTrader: (33)

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.

Bearcat Steve

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

1sick'98WS6

iTrader: (19)

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

BLUE99T/A

iTrader: (2)

Powerbond, here. Great and easy mod.

CRL 01 SS

iTrader: (4)

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.

BackinBlack02SS

iTrader: (7)

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.

Lithium

iTrader: (47)

Its worth it.

blazinws6kush

I heard that you have to modify the asp pulley to install a cam. Thats why i got the slp.

WILWAXU

iTrader: (6)

Not true. Only have to modify the pulley if you go with a double timing chain.

amit

iTrader: (5)

asp here..

great mod.. definately noticed the engine revving much faster and its farily easy to do (30 mins)