1968 Race Hemi Vibration Damper
Ok thanks, I haven´t seen one and was thinking the way they are made. Is there a date for expiring on these typ dampers? I mean rubber being dried out... or maybe the material today is stable...
No expiration date...but because they way they function, they literally self destruct to protect the crank. The rubber will lose its durometer (get soft) and when it does, it looses his ability to absorb the harmonics which destroy cranks. It can also happen if the rubber dries out and gets hard.
I personally use Fluidamper on everything I have and most of what I do. Never had a failure. Most of the time, my personal stuff turned 8800 RPM on dead STOCK cranks. Never broke a crank. Had a buddy with a nova, he couldn't fit the bigger diameter Fluidmaper so he went with the 6.25 diameter (IIRC on size...I know I'm close) and he beat the hell out of it, turning 8000 RPM. He never broke a crank. We both ran clutches. Plus there were many others I used and never had a failure.
Not trying to sell you on FD. Many guys on the web call them parts breakers. I've never seen it. And I've used many of them and still do.
If you are Leary of the FD, that Innovaters West would be my next choice. I try to stay away from elastomer ( I call them rubber band dampers) because they are really sensitive overall weight, durometer of the rubber and the condition of the rubber.
I was hearing bad stuff about FD, so in 1990 I called ATI to buy and test their damper. My bob weight at that time was 1670 grams, which for a Chrysler was damn light. I called ATI and the tech guy was going to sell me an off the shelf damper. I was at least 200 grams lighter than anything I'd seen at the time. They kept telling me Bob weight didn't matter. They tried to tell me ROM doesn't matter ( the engine on the track, never went below 5800 RPM) so the damper needed to be tuned for use up that high on the RPM range. Still, giving me a off the shelf part.
Needless to say, I hung up and never called back.
Just my .02 and real world experience.