Lightweight crank pulley vs OEM vs Fluidampr by MotoIQ

[churchx]

Common failure? What makes you think so? One thing is how reliable is or isn't some overmoded car (or it's engine), another thing how long lasts not abused and almost stock one.

[stugray]

Originally Posted by ka-t_240

So, would you think a product like the fluidampr is something that will help with longivity on these cars as it appear the common failure is starting to be the bearings?

I am not positive, but I believe that the "common bearing failure" that you are referring to is failure of the ROD bearings, not the MAIN bearings.
For Rod bearings to fail it typically means abuse (high HP, or knocking) or oil starvation.
So a pulley solution would not change the failure rates of those two failure modes.
If we were experiencing MAIN bearing failures, then a fluid vs lightened vs OEM pulley could play a role in reducing the failures.

[ka-t_240]

Originally Posted by stugray

I am not positive, but I believe that the "common bearing failure" that you are referring to is failure of the ROD bearings, not the MAIN bearings.
For Rod bearings to fail it typically means abuse (high HP, or knocking) or oil starvation.
So a pulley solution would not change the failure rates of those two failure modes.
If we were experiencing MAIN bearing failures, then a fluid vs lightened vs OEM pulley could play a role in reducing the failures.

Ya, seems like Rod bearings is the issue. Was thinking anything you can do to help keep the bottom end happy helps, even if not directly linked?

[Tekno Virus]

My car does vibrate a ton when I revv it up a lot. I would definitely consider this product. The reviewer took the time to look at it in a methodical manner which makes reading it up on things a whole lot easier. I think mayber the car hits a harmonic at 5k rpm, maybe.

[Tekno Virus]

Is there an installation procedure for this product?

[Black Tire]

Originally Posted by Tekno Virus

Is there an installation procedure for this product?

I would assume that it is no different than any other crank pulley. It would probably be a good idea to replace the retaining bolt and the o-ring with new parts at the same time. Try this thread:

Aftermarket Crank Pulley Install

[Naco]

Not only a good pairing with aftermarket cranks and built engines, but also a good pairing with lightened flywheels.

On the EJ's, lightened flywheels and lightweight crank pulleys used to eat up bearings like no tomorrow.

Still a little sad that we didn't see the HP gains the F20/F22 motors got from these but then they do rev much higher.

[Mikeez]

Originally Posted by stugray

One thing I like to point out in these discussions about "Can a lightened pulley provide more HP":


Can HP be measured at a constant RPM? - YES.
In fact the original term "Brake Horse Power" was used because the oldest method of measuring HP was to hold the engine/motor at constant RPM and apply the "Brake" (yes an actual BRAKE).
When the engine begins to drop RPM (and the throttle cannot be opened any further), the power applied to the brake was determined and that was the 'BHP' for that particular RPM.
Repeat the test at all RPMs and you get the typical curves that we are used to seeing from Dyno runs.


SO IF classical Horsepower is measured at constant RPM, then WHAT does rotational mass have to do with HP?
Answer - NOTHING.


(Since rotational mass only resists CHANGES in RPM.)

This is correct.
I also want to add that in any physics questions, pulley weight is neglected.