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Thread: Clutch Master Cylinder

  1. #11
    Join Date
    Aug 2015
    Location
    CT
    Posts
    27

    Default

    I pulled the engine/tranny last weekend, separated the two to get to the slave cylinder and...chunks, of clutch plate.
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  2. #12
    Join Date
    Aug 2015
    Location
    CT
    Posts
    27

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    The pressure plate is from Centerforce, but from the records the PO installed a Ford performance clutch. Also the flywheel, which looks a little burnt, is aluminum from Indigospeed, I couldn't find much info on them. The clutch can't have more than 7k on it in the last 12 years. I haven't raced it and I don't think it's been through anything other than occasional autocross events by POs.
    Should I be looking for some underlying cause or just consider this normal?
    I've contacted Josh at RMC but he didn't have anything other than a smaller clutch plate in stock, but did say that he would look into it for me.
    I'm thinking I want to replace the whole mess. I don't track the car so I don't think a full on racing setup is necessary.
    Any suggestions on replacement parts? The current clutch is 9 1/2".

    Bill

  3. #13
    Join Date
    Aug 2015
    Location
    CT
    Posts
    27

    Default Flywheel

    Here is the flywheel.
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  4. #14
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,473

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    Well, that would explain things. Yikes!

    I'm using an AP Racing clutch and pressure plate, and a Raceline steel flywheel. I believe Caterham and SBD also use AP Racing clutch components, but I'm sure someone here can refute if that's incorrect. My clutch was out as part of the rebuild, and after 32k street miles, there was plenty of meat left on the disc, and both the pressure plate and flywheel mating surfaces were in great shape with no obvious burn marks or wear.

    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

  5. #15
    Join Date
    Aug 2015
    Location
    CT
    Posts
    27

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    Thanks John,
    I’ll add those to the list. Does that set up have good street mannners?
    While the engine is out I’m going to address some seepage that I didn’t see before so it’s going to take a little longer than I had hoped.

  6. #16
    Join Date
    Jun 2013
    Location
    N. California
    Posts
    126

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    Bill,
    I have a 2.3 Duratec w/ a T9 and lightened steel flywheel. The clutch is from AP and it's part of the CP5352 family. There are a bunch of different versions w/ different spline arrangements depending on your input shaft. Mine's a -5. Unfortunately there's no P/N visible on the AP pressure plate, but there are 3 offered for that clutch. It's rated for 250 ft-lbs of torque. (Edit: The PP may be a CP5905-1 from comparing Burton's description and a photo I have.)

    This may help:

    https://apracing.com/drawings/2018%2...e%20Clutch.pdf

    The clutch is of a more conventional design with a organic lining and no floating pucks. Seems to work pretty well and when we pulled the car apart it didn't exhibit any weird wear from the PO's 7000+ miles.

    Hope this helps!

    Andy
    Last edited by ashyers; 07-18-2020 at 11:06 AM. Reason: add info

  7. #17
    Join Date
    Aug 2015
    Location
    CT
    Posts
    27

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    Thanks Andy,
    This will be helpful as I gather information.
    Bill

  8. #18
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,473

    Default

    I connected with AP Racing to help me identify clutch condition. Below are the specifics they provided (note: this is for a Duratec). Looking this information over again, I notice they state the clutch is rated for 7000 rpm. I previously used 7500 rpm redline with no issues, and plan to increase that 500+ rpm with the new engine. Guess I'll see if that creates a problem:

    From the numbers provided I can tell you that the driven plate is an AP Racing component
    CP5352-5
    215mm, spring centre, organic friction linings, 1.02x23T spline.
    Rimmed retainer plate for increased strength to spring windows
    Increase damper springs strength to accept 250lbft torque
    High Mu friction linings (0.3mu) to increase torque.
    Rated to 7,000 rpm
    New clamp thickness = 7.11mm
    Minimum worn thickness = 5.6mm

    Pressure plate # LC03JR 003B is just the cover pressing # used in a number of clutch assembly builds including standard service units produced by Raicam here in the UK. We both use this same Ford pattern pressing, but APR produce the uprated / high clamp / high torque units.
    APR Part # CP5905-500 (RED paint code on spring fingers)
    Rated to 220lbft

    -John
    '95 Westfield SEiW w/2.0L Duratec
    '68 Lotus Elan FHC
    '91 Miata w/Flyin Miata suspension & brakes
    '95 Porsche 993 C2
    '86 Porsche 944 turbo (neglected project car)
    Throttle Steer

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