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Old Feb 18, 2011 | 07:35 PM
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Fluidampr Opinions

I recently ordered a new serpentine belt and plan on changing it soon (it's 5.5yrs old). I thought I might put on a Fluidampr at the same time. I am wondering what you guys think of these - does it really help with longevity or smoothness?

I've read their website -overall it sounds like the kind of performance difference (+10HP) that I might not notice.

Has anyone had to replace the stock harmonic balancer b/c of failure? Any troubles with the Fluidampr?
 
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Old Feb 18, 2011 | 07:44 PM
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I have no experience with them in the diesel world. I have one on my 86 Grand National, no seat of the pants gains, but it seems to run a little smoother.

I am subscribing cause I was thinking of putting one on my 06. I will be installing one on my 383 build for my 85 K20.

Sarge
 
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Old Feb 18, 2011 | 08:59 PM
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It helps with smoothness higher up in the RPMs, which my peak HP/TQ is higher then most as HP peaks at 3900.

Now the race care people will say to stay away from them due to failures on the track. That's true, but also realize that on the track they are experiencing far greater RPMs then even I do and they are also in a very harsh environment due to the nature of racing.

It may be worth it for the stock or just tuned 6.0 owner, but I can't swear to that as I put mine on when I did injectors. Still going strong after 3 yrs.
 
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Old Feb 18, 2011 | 09:35 PM
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I have seen to date one stock dampner fail. IMO its a diesel the ratlle and vibrate anyway....
 
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Old Feb 18, 2011 | 10:08 PM
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I assumed that torsional vibration was more of a concern with inline engines.
 
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Old Feb 18, 2011 | 10:39 PM
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build NHRA superstock engines.WE DO NOT USE Fluidampr balancers at all.The fluid hardens over time and will throw the engine of balance.
They are junk
 
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Old Feb 18, 2011 | 10:46 PM
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Originally Posted by BobsF350
build NHRA superstock engines.WE DO NOT USE Fluidampr balancers at all.The fluid hardens over time and will throw the engine of balance.
They are junk
What did I tell you the race car people will say.

Different environment. I've seen manual trannys that would go a lifetime on the street, but put them in a few races and they are toast. For over the road work and towing within the truck's limits, fluidampner shouldn't give you any problems. Put it in a high stress environment, you might have some issues.
 
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Old Feb 19, 2011 | 06:22 AM
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I've been running one since 06 and never really noticed a difference. IMHO it's pretty much a waste of money for MOST people and a lot of diesel guru's will tell you stick with the stock one (which also weighs a lot less).
 
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Old Feb 19, 2011 | 06:34 AM
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Originally Posted by npccpartsman
I've been running one since 06 and never really noticed a difference. IMHO it's pretty much a waste of money for MOST people and a lot of diesel guru's will tell you stick with the stock one (which also weighs a lot less).
It is one of those things that's hard to quantify the difference in that's for sure.

I had always thought it helped at higher RPM range, but then again it could have been a placebo effect to it.
 
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Old Feb 19, 2011 | 06:45 AM
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Originally Posted by BobsF350
......The fluid hardens over time and will throw the engine off balance.....
Tex--this is the comment that really concerns me and not the first time I've heard it. I wonder if there's a lifespan that we should be concerned about. I know there are also better aftermarket dampers than the fluidampr.
 
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Old Feb 19, 2011 | 07:10 AM
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Originally Posted by npccpartsman
Tex--this is the comment that really concerns me and not the first time I've heard it. I wonder if there's a lifespan that we should be concerned about. I know there are also better aftermarket dampers than the fluidampr.

The problem is, in every instance that I've heard that is that it's been mentioned along with racing. That's an extremely harsh environment that tears up a lot of parts. Parts that last a lifetime on the street, but last 3 races if they are lucky on the track.

I have yet to hear this happening on a fluidampner for a street application.
 
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Old Feb 19, 2011 | 12:37 PM
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Originally Posted by BobsF350
build NHRA superstock engines.WE DO NOT USE Fluidampr balancers at all.The fluid hardens over time and will throw the engine of balance.
They are junk
Can you quantify the "over time" part? Is it years, several races, months? I have heard this before too, but as Tex said, only with respect to racing.

I have no intention of racing and agree it is an extreme condition to pass judgment on a part.
 
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Old Feb 24, 2011 | 01:57 PM
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I have run Fluidampr's on Small and Big Block Chevrolet's in street, strip, and marine applications for many, many years.

I honestly have never cut one open to see if the fluid has changed viscosity in any way. I have however, seen some high mileage, high performance street engines running Fluidampr's disassembled and have cherry main bearings.

I have seen many drag and high performance marine engines running Fluidampr's disassembled for freshening... with some pretty impeccable mains.

Would these engines have had the same, impeccable bearings with a factory balancer? Maybe.

My '03 6.0 has had a Fluidampr since they were first made available (at about 10k), and has given me 7 years of trouble free service. I don't think I am ready to drill a hole in it to check viscosity, although I would love to see someone do it.

I didn't feel any earth shattering difference after installing mine, but it did seem to make the high RPM vibration slight less perceptible.

Again, I would love to see pics of a Fluidampr cut in half, with the fluid as a solid. I would definitely think twice about purchasing another one if I were to see one in that condition.
 
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Old Feb 24, 2011 | 02:38 PM
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Originally Posted by SoCalSuperDuty03
I didn't feel any earth shattering difference after installing mine, but it did seem to make the high RPM vibration slight less perceptible.
I agree and I think the difference is a little more noticeable if you have an engine that has their peak HP/TQ output higher in the rpm range then it is from the factory.
 
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Old Feb 24, 2011 | 09:53 PM
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Like the others I have an 03 and have had one since they they came out. I was one of the first to bring it to their attention that it doesn't work with the dual alternator system. I had my second pulley machined to fit long before they came out with a pulley for this application. I noticed a bit smoother thats it. Would I do it again? Probably not. No return on the investment that I see.
 
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