What is the purpose of a underdrive Pulley??

[naga]

hey guys I would like to know what is the purpose of changing a under drive pulley? I also would like to know which is the best one out there and how much it would cost to install it?

[Apex Paul]

The intent is to reduce energy lost to accessories by turning them at a slower rate, thereby increasing power and torque to the drivetrain. Generally, there isn't a tremendous gain from an underdrive pulley. On the other hand, they are generally not super expensive. If you break that into dollars/HP gained it might be a different story.

[longbeachss2010]

well it should be like 100 bucks for install . i got slp pulley for 175 and now have to look for the 2 belts i need. its worth the extra 5 to 10hp if ur not gana add electronics like subs and lights everywhere. i will have a shop install it once i have all the parts i need. kooks headers cats and tune

[gearhead440]

I just performed this myself and these threads may be useful, belt part numbers included (pictures included).

http://www.camaro5.com/forums/showthread.php?t=38661
http://www.camaro5.com/forums/showthread.php?t=90921

[Ovenmitt]

Originally Posted by longbeachss2010

well it should be like 100 bucks for install . i got slp pulley for 175 and now have to look for the 2 belts i need. its worth the extra 5 to 10hp if ur not gana add electronics like subs and lights everywhere. i will have a shop install it once i have all the parts i need. kooks headers cats and tune

You're paying a shop 100 dollars to remove and replace one bolt? I want some of whatever you're smoking.

[SlingShot]

Originally Posted by Ovenmitt

You're paying a shop 100 dollars to remove and replace one bolt? I want some of whatever you're smoking.

Be NICE ... He may be disabled and in a wheelchair, you have no idea of a person's reason for their choices ...

[Ovenmitt]

Originally Posted by SlingShot

Be NICE ... He may be disabled and in a wheelchair, you have no idea of a person's reason for their choices ...

Nothing wrong with having a shop do it. But $100? It's a ten minute job, tops.

[Ron66Vette&10SS]

Originally Posted by Ovenmitt

Nothing wrong with having a shop do it. But $100? It's a ten minute job, tops.

A 10 minute job on an LS motor? Wow.....you're good!

How many of you guys have actually installed one on an LS engine? There's just a little more to it than "remove and replace one bolt".

As far as U/D Pulleys, I'm a firm believer in them and have ran them in my cars over the last 13 years. Only issues I've had on 5 cars were needing to replace the batteries on 2 of them. Both cars were automatics and the batteries were more than 4 years old.

I believe that SLP's and Texas Speed's U/D pulleys are both made by Powerbond. Either one should be fine.

[Jason 98 TA]

It'll take a little bit more than 10 minutes, but it's not a hard install at all. We were the first company with a kit for the 2010 cars. The complete kit has been tested here @ TSP tons of times. It will add 8-9rwhp.

http://www.texas-speed.com/shop/item...=1016&catid=20

[BlessedChef10]

I got one

[naga]

thanks for the information guys!!!!

[BlessedChef10]

I noticed some increase. I got one a while back when no one knew what size the right belt was so I had to wait a while to get it installed.

[caper]

how much is the AC belt? i already have the other one.

[SMGSS]

Originally Posted by Ovenmitt

You're paying a shop 100 dollars to remove and replace one bolt? I want some of whatever you're smoking.

as others have said, there's a bit more too it than that.

Install is free for the pulley if your getting a cam installed as well

Originally Posted by Ron66Vette&10SS

A 10 minute job on an LS motor? Wow.....you're good!

How many of you guys have actually installed one on an LS engine? There's just a little more to it than "remove and replace one bolt".

As far as U/D Pulleys, I'm a firm believer in them and have ran them in my cars over the last 13 years. Only issues I've had on 5 cars were needing to replace the batteries on 2 of them. Both cars were automatics and the batteries were more than 4 years old.

I believe that SLP's and Texas Speed's U/D pulleys are both made by Powerbond. Either one should be fine.

Idk about Texas Speed's but SLP's is. They are a great complimentary mod, theres not a huge gain but we have show similar gains as Jason stated. Its one of the best bang for the buck mods out there.