Order is the harmonic frequency over the fundamental (fundamental times order is the harmonic)

I don't know what is considered destructive in this case, but the amplitude of the harmonic peaks for each damper are similar - just at different frequencies (since the peaking is both different fundamentals and orders.)

This only tells me that Toyobaru got it right from the factory. But hey, I don't know anything.

I managed to track down this PDf about the Fluidampr pulley's development.

So does order relate to vibrational modes?

Sort of answered my own question - http://www.physicsclassroom.com/clas...-and-Harmonics the harmonics and the modes are the same it seems.. 1st harmonic = 1st mode.. just a matter of terminology.

What we clearly see here is OEM performing best.
Glad to see this before someone ordering these needless pulleys. I also expect the ATI pulley not performing different than Fluidampr.

Wasn't ATI's also undersized, hence turning all the accessory pulleys at slower speeds, hence potentially more gains?

But wait!?! What about all those people that said the OEM pulley was NOT a damper/dampener and was "just a pulley"?

Seems like the people who said that "IT IS a torsional dampener and the engineers put it on there for a reason" were right.

:bonk::iono::bonk:

:bellyroll:

Fluidampr performs slightly better as it is heavier (with a damper as well).

So if I'm reading this correctly the fluidamper is probably a good pair with a light weight flywheel or if you plan to turn rpms beyond (such as the 9k element tuning motor) but otherwise it's largely a waste over your stock damper.

Just installed mine.

http://i.imgur.com/efSjynS.jpg

The motor definitely feels smoother in high RPMs. Great peace of mine for a frequently tracked 86.

How do do the physical dimensions of the Fluidampr compare to the stock balancer? I have the Nameless header that runs up in front of the engine. If the Fluidampr is too thick (measured from the face of the timing chain cover to the face where the writing is on the Fluidampr) it would be very close to the header secondaries. Thanks.

I don't know. I didn't measure them. You can contact Vibratech and get an answer from them.

Pretty much the same size!

Fluidampr has the dimensions on the product page. :bonk:

OD:: 5-7/8"
Bore Dia:: 0.787"
Length:: 1.62"
Weight / lbs (Rotating Weight / lbs):: 5.8 (3.8)