TwinTurbo.NET: Nissan 300ZX forum - The fork he is refering to is the clutch release fork....
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Subject The fork he is refering to is the clutch release fork....
     
Posted by Greg D. (Specialty-Z) on October 06, 2011 at 7:58 PM
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In Reply To Fork posted by ltd on October 06, 2011 at 05:24 PM
     
Message Clutch manufactures tend to get carried away with the clamp load of the pressure plate to hold high power with a single disc clutch.
The stock clutch release system was not designed for very high clamp loads and they have traditionally had trouble releasing.
RPS went through this problem on the Z and we tested changing some of the parts in the system to try to make it work.
It took a long time to figure how to make a high clamp load pressure plate work on a Z with the stock release system.
After testing lots of ideas, we no longer need to change the fork, master, slave, hoses, ect in the system in order to achieve a good release, we found ways to achieve good release with leverage.
A lot of the other pressure plates on the market either have too much clamp load, a poor pivot point, or poor pivot shape and do not release well. These clutches cause the stock release fork to flex at the loads they are being subjected to, so installing a stiffer fork will allow these type of pressure plates to release better, but your still putting a huge strain on the master and slave with the clamp loads that are requiring a stronger fork.
Since you have the SB clutch, adding a stronger fork will help you to achieve more release.
The Flywheel will not cause shutter unless it has hot spots, shutter comes from either the type of material in the disc or any part in the system that is not flat.

     
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