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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 06-09-2015, 06:39 PM   #15
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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.)
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Old 06-09-2015, 09:46 PM   #16
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This only tells me that Toyobaru got it right from the factory. But hey, I don't know anything.
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Old 06-09-2015, 10:47 PM   #17
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I managed to track down this PDf about the Fluidampr pulley's development.
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Old 06-10-2015, 10:24 AM   #18
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Quote:
Originally Posted by cjd View Post
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.)
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.

Last edited by fika84; 06-10-2015 at 10:48 AM.
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Old 06-11-2015, 06:06 AM   #19
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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.
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Old 06-11-2015, 07:32 AM   #20
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Wasn't ATI's also undersized, hence turning all the accessory pulleys at slower speeds, hence potentially more gains?
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Old 02-14-2016, 07:30 PM   #21
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What we clearly see here is OEM performing best..
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.



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Old 02-14-2016, 08:03 PM   #22
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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.



Fluidampr performs slightly better as it is heavier (with a damper as well).
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Old 05-06-2016, 09:58 PM   #23
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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.
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Old 10-30-2016, 06:15 PM   #24
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Just installed mine.



The motor definitely feels smoother in high RPMs. Great peace of mine for a frequently tracked 86.
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Old 10-30-2016, 07:15 PM   #25
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Just installed mine.

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.
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Old 10-30-2016, 07:18 PM   #26
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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.
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Old 10-30-2016, 07:34 PM   #27
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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.
Pretty much the same size!
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Old 10-30-2016, 07:56 PM   #28
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Fluidampr has the dimensions on the product page.

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