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Pressure plate question


thedsmguy
Senior Member


Galant VR-4 org Post #: 1074621 posted 07/06/12 10:41 AM     Remind Me!  Send Private Message   Edit Post      
I have a couple plates that i took to a shop to have resurfaced. Both had a bevel on friction surface that was lower in the middle. Is this how a clutch comes? Does it "flatten" out when being used? And if so is it even possible to resurface such a thing? Right now it seems it would wear a disk in a weird way but the disk pulled seemed pretty flat still.

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mitsuturbo
Banthony
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Galant VR-4 org Post #: 1074624 posted 07/06/12 10:55 AM     Remind Me!  Send Private Message   Edit Post      
Naw man, you should be able to put a straight edge across the surface and it should be dead flat.

Instead of having mine resurfaced, to keep the clutch geometry better in spec, i took a new (cheap) pressure plate in with my old 2600 that had cracks in the friction surface, and had them put the new friction plate on it. Worked great for a few years.



92 GVR4 555/1000 11.41 @ 128.26mph
97 CBR900RR
2012 Hyundai Veloster


Edited by mitsuturbo (07/06/12 10:59 AM)

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thedsmguy
Senior Member


Galant VR-4 org Post #: 1074652 posted 07/06/12 01:37 PM     Remind Me!  Send Private Message   Edit Post      
Great idea

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transparentdsm
I have to say something dumb Member
138/2000


Galant VR-4 org Post #: 1074663 posted 07/06/12 02:18 PM     Remind Me!  Send Private Message   Edit Post      
what are the negative effects of the PP being high on the outside and low on the inside? because once the throw-out bearing presses the teeth on the PP won't that make the friction surface completely flat once again? i have no idea on this subject and would like to know so i can be more knowledgeable.



138/2000

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mitsuturbo
Banthony
555/1000


Galant VR-4 org Post #: 1074671 posted 07/06/12 02:29 PM     Remind Me!  Send Private Message   Edit Post      
The friction surface is cast iron, if i'm not mistaken. That shit's not going to flex. It's going to wear out the the friction disc unevenly.



92 GVR4 555/1000 11.41 @ 128.26mph
97 CBR900RR
2012 Hyundai Veloster

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JNR
5 star (English Professor) member Has extensive pop up picture book collection
20/1000


Galant VR-4 org Post #: 1074689 posted 07/06/12 04:52 PM     Remind Me!  Send Private Message   Edit Post      
Don't underestimate heat and is effect on materials!

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4thStroke
Spence knows tools
786/2000


Galant VR-4 org Post #: 1074828 posted 07/07/12 05:18 PM     Remind Me!  Send Private Message   Edit Post   
Quoting transparentdsm:

what are the negative effects of the PP being high on the outside and low on the inside? because once the throw-out bearing presses the teeth on the PP won't that make the friction surface completely flat once again? i have no idea on this subject and would like to know so i can be more knowledgeable.




If the plate is dished (warped), it will not clamp the friction disc properly, t won't be making full contact with the friction disc. This happened with my twin disc. If with the twin, I was blowing through the clutch right around peak torque, 450ftlbs or so.

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