Jadedbird

iTrader: (27)

i got a buddy who is basically giving me an UD SLP pulley. is it worth running?
pros vs cons?

Blackpanther99

iTrader: (8)

IMO it is worth it. People tend to see ~15 HP~ on alot of cases. Would you know what year did your friend buy it?

Jadedbird

iTrader: (27)

Not a clue. Think it was on the car when he bought it

Jadedbird

iTrader: (27)

Is there a significant year i should stray from?

Blackpanther99

iTrader: (8)

I always heard about the first production of those UD Pulleys coming out not soo good for the money. Specially for being a overpriced product for the results. Last I remember they did come out with a production of them that was a better product than the last one. Never really knew if this was a lie or not, some people just switched over to the ASP Pulley instead, but now days people seem to like them (SLP Pulleys). Have a pic of it?

brandon6.0

iTrader: (32)

i run a underdrive pulley. Its a jegs brand for my truck. I remember me and a buddy raced all the time he had a 383 stroker silverado it was neck to neck every time i couldnt out run him he couldnt out run me. I ordered and swapped underdrive pulley and pulled him by a truck every time. He couldn stand it lol. It worked for me!

Scoggin Dickey

iTrader: (34)

The only real difference between early and late ones was taller walls to hold the belt on better.

Run it! Between my wife and I we have 4 vehicles and all 4 have a Powerbond underdrive on them.

adamantium

iTrader: (3)

Any issues with any of the accessories? I had some guy telling me i would run into issues with an UDP, i bought the powerbond kit you guys offer.

KCS

iTrader: (20)

I have a Powerbond 25% on my car as well and no issues whatsoever, neither do any of our customers with the Powerbonds either. We use ATI's underdrive pulley on a ton of the LS7 Vettes and haven't seen any problems either.

Scoggin Dickey

iTrader: (34)

I've had 0 issues. Some guys have had issues, but it's RARE and generally can be associated with a weak alternator, large electronics demands from things added to the vehicle etc. When that happens there is an overdrive alternator pulley available, but most people don't need it.

409CISecondGen

iTrader: (2)

I bough the OD alternator pulley to begin with. Are the concerns about the SLPs/Powerbonds being out of balance and contributing to failure unfounded?

I'm just concerned because I plan on spinning my LS2 to 7K. Wondering if I need to sell my Powerbond and get an ATI 10% UD.

Scoggin Dickey

iTrader: (34)

I've never seen issues with the Powerbond/SLP. It is easily the most popular/highest selling balancer for LS engines, and as such if there were truly problems it would be very apparent.

I turn my h/c/i/spray C5 to 6900 and haven't had issues with my powerbond yet. For general street duty and drag strip/street cars I wouldn't hesitate to use the powerbond (as evidenced by my 4 vehicles that have it). There's no doubt ATI is a better balancer in serious applications and it's definitely a good idea to consider it if you are building a road race car or a serious drag car. If you're gonna live at 7k, road race, or race a LOT, go ATI. If it's just a fun street car that gets raced some weekends stick with powerbond.

RENE'S RAGE

iTrader: (96)

Get the stock size balancer.
Call ati, I bet they will say stock size, for 7,000 rpm's.

adamantium

iTrader: (3)

Thanks for chiming in guys, now i feel a bit better about it lol.

buddhaz06

iTrader: (8)

I've been spinning my h/c/i ls6 to 7100, rarely to 7300 without problems. Powerbond 25%

RENE'S RAGE

iTrader: (96)

On a motor spinning to 7,000 rpm's, it's all about the harmonics of the internal parts.
ATI balancers are great dampers.

jdub38672

iTrader: (4)

I'm sold I will be purchasing my powerbond next week. Plan on using it with a heads,cam, 416 with nitrous. Don't plan on spinning it more that 6800 rpm.

sopes

Ive also heard the UD is lighter and will allow for quicker revving

ws6guy27

iTrader: (31)

Ima be spinning around 7500 nitrous ls3 418. Which damper wouod be best. I will drive on street some. But its mostly going drag

ramairws6

iTrader: (33)

Powerbond/SLP here going on 6 years. Been on everything from my stock LS1 to a 427,441, and now my 9 second 445. Great upgrade and zero issues!!