Bad harmonic balancer on my LS1, which to choose?
Thread Starter
Teching In
Joined: Oct 2009
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From: San Juan, Puerto Rico
Bad harmonic balancer on my LS1, which to choose? My harmonic balancer caused the belt to start making a loud squeaking noise that won't stop. Need to replace it and I don't want the stock GM one. I've installed ported LS6 heads, LS6 intake, 232/234 Comp cam (with all the other hardware required), long tube headers and other parts. I'm having to replace a crank pulley that I installed less than a year ago, since when I did the cam and heads project I did the new balancer as well.
I would like any of your recommendations for a good aftermarket harmonic balancer. Please help...
I would like any of your recommendations for a good aftermarket harmonic balancer. Please help...
Thread Starter
Teching In
Joined: Oct 2009
Posts: 5
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From: San Juan, Puerto Rico
When I first started the engine up after the build the loud squeaking soundwas evident. I had been working on my project doing body work and hadbeen starting the engine every once and a while for break in. I squirted WD40 atthe belts and the sound would stop but come back after a couple of minutes. I dida lot of research about it and decided that it was the damper. I pulled it out and found that it has a flatspot on the rim. Seems that it had beendropped at the parts store, since I'm sure that I never dropped it. The rubber was irregular and didn't seemcorrect, but I wanted to get the engine part of the restoration project donewith, so I installed the damper as it was. I was concerned of how it looked but I never did see the flat spot onthe rim. The attached link is from thefirst time the engine was started:
The ATI UD is only a 10% - but most of the power gains come from better harmonic dampening. But I agree. ATI is the way to go.
If you can't swing $420, the Powerbond is a decent alternative. It provides a 25% UD, which is a lot for a street car. I think it's $219 with belts and new bolt from Scoggin Dickey.
If you can't swing $420, the Powerbond is a decent alternative. It provides a 25% UD, which is a lot for a street car. I think it's $219 with belts and new bolt from Scoggin Dickey.
Thread Starter
Teching In
Joined: Oct 2009
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From: San Juan, Puerto Rico
I really appreciate all your comments and suggestions. I always feel confident that I will find the correct answer for my LS1 questions in this forum. Knowledgeable people that are willing to help their fellow enthusiast in a honest and uninterested manner. Thanks!!
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
Powerbond 25% here with no issues. Our summers here are HOT so I added a smaller alt pulley to speed it back up to keep up with the AC demand.Check WS6store for proper belt number if you decide to go with the alt pulley along with the 25%.
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The ATI UD is only a 10% - but most of the power gains come from better harmonic dampening. But I agree. ATI is the way to go.
If you can't swing $420, the Powerbond is a decent alternative. It provides a 25% UD, which is a lot for a street car. I think it's $219 with belts and new bolt from Scoggin Dickey.
If you can't swing $420, the Powerbond is a decent alternative. It provides a 25% UD, which is a lot for a street car. I think it's $219 with belts and new bolt from Scoggin Dickey.
https://sdparts.com/details/powerbon...pbu1480ss25-fb
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I have the Powerbond stock replacement pulley, looks really nice and its only $75 bucks if you look around. Haven't gotten around to installing it yet but it should do the trick. If you need an SFI one Powerbond makes one for around $200, or if you want the best of the best get the ATI but its $400+.
12 Second Club
Joined: Sep 2005
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From: Bucks County, Pa.
Your mods, build, and power level warrant it (even if most on here say otherwise), especially if you are going to wind that LSx out often.
The whole deal will also last longer as well.
ATI is the best I run their 10% ud. I got mine for 225 shipped scratch and dent. Call or email ati and see if they can build you a "blemished" pulley like they did for me. my defect is that the timing marks are mis marked but the pulley itself is great
IMO, this is a better solution than a OD alt. pulley.
Last edited by 99Bluz28; May 16, 2013 at 01:16 AM.
Yep...that scoggy powerbond kit one is a deal! Belts, re-usable bolt and balancer for 219!
https://sdparts.com/details/powerbon...pbu1480ss25-fb
https://sdparts.com/details/powerbon...pbu1480ss25-fb
Joined: Jun 2011
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From: Land of the Mormon's although I'm not one of them
