Pressure Plate - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 12-08-2008, 04:10 PM   #1
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default Pressure Plate

I have the ACT Extreme setup and I plan on keeping the same setup after the everything goes back together. However, I'd like to make sure that everything is up to par before it all goes back together so I don't have to tear it down again hopefully any time soon.

The disc, while it still has some life left, needs to be replaced now rather than later. Instead of buying a complete kit, I'd rather buy a replacement disc.
That said, I don't know the first thing about judging the worthiness of the pressure plate. Until I get home, I cannot post any pictures of it's condition, but I can say that the fingers are all at the inclined angle normally seen on a new clutch, none of them are bent in any odd way, and the only wear seen on them is at the tip where the release bearing sits. On the plate side, a few small burn marks are visable, but the plate itself is not warped or pitted. Overall, I feel that it is in good enough shape, but other than having messed up fingers, I don't know what consitutes a "bad" pressure plate.

Anyone care to enlighten me? Thanks.
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 05:30 PM   #2
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

To be honest, I have never seen someone break a pressure plate. I most often here people screwing up the discs and flywheel, but never toasting a pressure plate.

What I would do is clean the plate up with some sand paper and then examine it. Better yet, post a picture.
Saml01 is offline   Reply With Quote
Old 12-08-2008, 05:41 PM   #3
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

I will post a picture as soon as I get a chance to!
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 07:25 PM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,854
Total Cats: 1,788
Default

PP is fine order a new disc from carolina clutch.
Braineack is offline   Reply With Quote
Old 12-08-2008, 09:00 PM   #5
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Well just to be sure Brain, here are some pictures:

Name:  DSC02974.jpg
Views: 7
Size:  83.1 KB
Name:  DSC02980.jpg
Views: 6
Size:  40.8 KB
Name:  DSC02975.jpg
Views: 6
Size:  79.0 KB

I can still feel the striations in the plate as well.
When does a pressure plate normally wear out or go bad? I already have new bearings, so if I just need a plate, I'll order one from Hi Im Simon's ACT vendor buddy.
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 09:03 PM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,854
Total Cats: 1,788
Default

call ACT and ask them how much force it takes to lift the friction surface when the diaphragm is pushed down new...then take the PP to a shop with a press that can measure the load....measure and compare
Braineack is offline   Reply With Quote
Old 12-08-2008, 09:11 PM   #7
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Quote:
Originally Posted by Braineack View Post
call ACT and ask them how much force it takes to lift the friction surface when the diaphragm is pushed down new...then take the PP to a shop with a press that can measure the load....measure and compare
Oh. I can barely get parts to the machine shop around my work schedule, much less find a place during normal business hours that can do that. Especially around here in BFE.
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 09:16 PM   #8
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

lightly scuff that bitch with some sandpaper
install new disc
?????
profit
Ben is offline   Reply With Quote
Old 12-08-2008, 09:18 PM   #9
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Yeah yeah yeah, I know your opinion already. lol I told you I was going to post this.
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 09:21 PM   #10
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

right, but I added profit
Ben is offline   Reply With Quote
Old 12-08-2008, 09:30 PM   #11
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Very true.
RotorNutFD3S is offline   Reply With Quote
Old 12-08-2008, 10:53 PM   #12
Elite Member
iTrader: (9)
 
Join Date: Aug 2006
Location: Concord, North Carolina
Posts: 4,173
Total Cats: 5
Default

I want to do this when I swap motors...go from a street disc to a 6 puck to hold a bit of extra power, but still save weight and about 300 bucks.
miatamania is offline   Reply With Quote
Old 12-09-2008, 10:25 AM   #13
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Is there any particular grit sandpaper I should use? Any particular method (besides lightly scuffing)? Basically what should the end result be?
RotorNutFD3S is offline   Reply With Quote
Old 12-09-2008, 12:25 PM   #14
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,526
Total Cats: 0
Default

ive used like 150 grit and a small block, seemed to work fine. The scratches will be removed in a few hundred miles
akaryrye is offline   Reply With Quote
Old 12-09-2008, 01:37 PM   #15
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,854
Total Cats: 1,788
Default

use a ScotchBrite pad.
Braineack is offline   Reply With Quote
Old 12-09-2008, 01:39 PM   #16
Elite Member
Thread Starter
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

Cool. So just because I want to know, other than worn out fingers or a messed up plate, is there anything else that makes a pressure plate "worn out"?
RotorNutFD3S is offline   Reply With Quote
Old 12-09-2008, 02:40 PM   #17
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

There's nothing else to it. I think that would be it.
Saml01 is offline   Reply With Quote
Old 12-09-2008, 05:46 PM   #18
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

should I expect to be able to reuse a pressure plate when you have a metal clutch disk?
hustler is offline   Reply With Quote
Old 12-09-2008, 06:11 PM   #19
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,796
Total Cats: 248
Default

Quote:
Originally Posted by RotorNutFD3S View Post
Cool. So just because I want to know, other than worn out fingers or a messed up plate, is there anything else that makes a pressure plate "worn out"?
I've seen the fingers wear, or bend. Also seen the friction surface be worn to the point that the rivets on the disk hit the friction instead of the disks' frictions, causing it to pretty much not work. Or a warped friction, or glazzed over surface.

I'd just scratch it up and run it. It's not rocket science really. I'd get some 80 grit sand paper or so and scuff it up till it's clean metal. You don't want it dead slick or it won't cut into the new friction disk and break in. Same reason you hone an engine block.

As said, sandpaper on a flat surface is your best bet. A small 1" piece of glass works great if you happen to have something like this, as it's dead flat, very rigid, and will allow you to literally "surface" it pretty damn flat. I've surfaced small cylinder heads for small engines (go carts, outboards, etc) using this method. Very easy to get into factory spec.
patsmx5 is offline   Reply With Quote
Old 12-10-2008, 01:25 AM   #20
Elite Member
iTrader: (8)
 
Join Date: Oct 2007
Location: Dallas
Posts: 1,841
Total Cats: 0
Default

Get s scotchbright pad from the kitchen. Your mom, girl, or roomate will never know it is gone. I wouldn't use anything heavy. Mine came off easy with the green pad, and there won't be any scratches to wear on your disc.

It is broke sell it to me cheap!

Quit thinking and install it. It is in perfect shape. Those pressure plates last forever. Those shiny spots on the teeth are normal. And will happen the first time you push the clutch in.

Seriously though, if you don't trust it, PM me. But I would use it if I was you.

Good Luck!
Toddcod is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Recommended Tire Temp for best friction thumpetto007 Race Prep 4 09-27-2015 06:16 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:10 PM.