roneski

iTrader: (3)

I was talking turbos with a friend of mine and neither of us had heard of anyone blowing a VQ motor that had a Fluidampr pulley installed. I'm sure that they're out there though, I suspect that it's just because people with blown motors have bigger things on their minds but still I ask the question.

How many people have blown a motor with a Fluidampr crank pulley installed? Stock block or built, it doesn't matter.

Also, has anyone blown a front oil seal with a Fluidampr installed?

q8pianist

are u talking about the SFI 18.1 ?

i sent an email for them and thats what they told me.

Hi Ahmed,

Yes our VQ35 Fluidampr will be safe with your engine & mods. Our
Fluidampr will put up with the power you are making much better and will
keep you engine running smoother & longer than any damper on the market.
You can close up your engine & once you have a Fluidampr you can install
it.
If you have any other questions please let me know.
Thanks.

Dan Oddy
Sales Engineer

Fluidampr / Vibratech TVD
Horschel Motorsports
716-592-1000 ext. 6231 phone
716-592-1001 fax

q8pianist

dont forget that VQs are internal balance.

roneski

iTrader: (3)

I know that they're balanced but being balanced doesn't necessarily account for all of the torsional stresses that engine parts may take while operating. Balanced or not, cylinders fire independently at different points along the crank causing stress in the form of vibration at varying frequencies.

But that's not the point of this thread, I'm just looking to see if there has been any sort of data pattern regarding the use of Fluidampr crank pullies and catastrophic engine failures.

So far it's interesting that there have been no responses.

Mike Wazowski

iTrader: (113)

maybe because not many people use them???

what a tool

BoOsTedz33TT

iTrader: (1)

+1
this guys a moron if he thinks a pulley will save a motor

roneski

iTrader: (3)

That's a definite possibility. VRT recommended that Mike B install one on his Z if I remember correctly. They didn't mention it to you though? Interesting.

And if they are worthless then what's the purpose of SFI 18.1 requirement for cars running faster than 10.99 anyways?


Stay narrow minded guys, it's all good.

overZealous1

iTrader: (27)

thanks for bringing up this question. vibrational dampeners are designed to absorb the imbalance of a motors firing sequeunce. when a piston fires, (hence what you feel in the seat of your pants) it puts a massive force on the crank (again, what you feel in the seat)
the rest of the crankshaft is at rest (lets call it that) then gets a massive blow to turn linear motion into rotitional motion. every time your motor fires, the crank will bend under these stresses. a dampener is designed to absorb these frequencies so the harmonics will not damage the crank or the rest of the motor.
yes, a good dampener will give you nothing but good luck, but, just like a properly tuned suspension, to be optimized those frequencies have to be cancelled to be effective.


in other words, do it!

overZealous1

iTrader: (27)

btw- the sfi rating is only for rpm. dampeners are typically a viscous connection that will shred themselves if harmonics are bad at high rpm. don't do lightened pullies with f/i

the harmonics will change as hp increases. at least keep the stock balancer. a crank without an absorber WILL transfer the shock to something else (ie bearings,stress cracks.
ok, i will go on a tangent here. depending on the metal, they all have a fatigue strength. the cycles that it can still flex..............

hopefully i got my point across, the rest is a discussion with "resolute" or others of the like

chimmike

iTrader: (7)

so how much is that thing and where can it be purchased? still haven't found a vendor for it yet.

roneski

iTrader: (3)

http://store.summitracing.com/partde...5&autoview=sku

HoldThisForMe

iTrader: (4)

I have the CNR pulleys and im F/I...could this be the reason my front main seal is leaking???

roneski

iTrader: (3)

I've always suspected a connection between aftermarket pulleys and leaking seals. Of course I don't have any conclusive evidence, but it seems like a reasonable possibility.

SinCity350Z

iTrader: (19)

It was actually Ed's idea...

helldorado

iTrader: (4)

I have a question while we're on it. Since the Fluidamper is stock sized, has anybody used one with a supercharger setup?

Eagle1

iTrader: (2)

I believe my car was the first one from VRT to use a harmonic damper like the fluidamper. If you want an overdrive pulley feature you can just get a smaller diameter one. But I used the same pulley diameter as stock on my car, and there has been no problem.

roneski

iTrader: (3)

I could have sworn that I talked to Scott or Michael about it being on Mike's car. Oh well.

I've had one on mine since before I went turbo. No problems to speak of.

SinCity350Z

iTrader: (19)

I do have one on my car, but I got the idea from Ed.

Eagle1

iTrader: (2)

Ty:
There was a lot of discussion about mods to my car with Mike A. and Scott, and in addition to the fluidamper I specified a bunch of things that were outside the parameters of the then normal VRT build. These included things like the Amsoil BMK-13 dual bypass oil filter system, the thermal barrier coating, the motordyne iso thermal plenum, and some other stuff. Not all cars or owners are going to want to do what I did because they will not have the same types of objectives or interests. But the fluidampr was something I spent quite a bit of time researching and it was my conclusion that it was an "all good" modification for a high horsepower Twin Turbo application on our motor. The torsional vibration/deflection on the crank is very definitely a factor.