What size clutch... CP gearbox

Discussion in 'Mech Tech' started by Jonny Rock 66, Oct 10, 2017.

  1. Hi all, need your collective minds to guide me in this one regarding the correct clutch etc.

    So, I have a type 4 W code engine, (out of a variant 411LE) and originally was going to mate this to my CU code 1600 gearbox. The engine has been upgraded a bit, a hotter cam and 1911cc B&P.

    But out of the blue i'v managed to get hold of a CP code gearbox. Happy days....

    So my question, my W code engines flywheel is 210mm. Should I still use this with the CP gearbox or should I splash out on a new flywheel and clutch kit for the CP gearbox.

    If new flywheel and clutch, what size should I go for that will make the best out of the gearbox and engine.

    I,v looked at to many websites and gone 'clutch blind', all help greatly appreciated.

    Thank in advance, Jon
     
  2. you can use your existing clutch, they both compatible
    Do you want to sell your old gearobx?.
     
    Jonny Rock 66 likes this.
  3. Hi nobody, thank for you reply.
    So I can use the 210mm flywheel and a new clutch kit for that flywheel in the CP gearbox?

    I guess I will sell the CU gearbox. Its at the unit with van and it will be a couple of weeks till I get over there. Shall I PM you when I dig it out.

    Cheers, Jon
     
  4. yes you can. give me a shout about gearbox.
     
  5. Cheers, will do.
     
  6. MorkC68

    MorkC68 Administrator

    We have a similar set up using an AP code motor with CP 6 Rib, we have gone for a 228mm clutch/ flywheel setup with no issues
     
    Jonny Rock 66 likes this.
  7. Thanks Mork, is there an advantage in going for the larger set-up over 210mm
     
  8. MorkC68

    MorkC68 Administrator

    Possibly handle more power through the friction plate & withstand slippage better
     
    77 Westy and Jonny Rock 66 like this.
  9. Ok thank you. I will investigate price and best deals going around. Cheers.
     
    MorkC68 likes this.
  10. So I'v looked everywhere for a 228mm flywheel and can't find one anywhere, clutch yes, flywheel no. But I can find 215mm flywheels and clutch kits which
    supposedly fit as well.

    Will the 215mm set up be ok with my CP 6 rib and W code Type 4 engine?

    Anyone used this set up?
     
  11. Anyone able to help with my last post/question.

    Thanks.
     
  12. 77 Westy

    77 Westy Supporter

    You don’t have much choice, do you? If you can’t get a 228mm, 215mm is the next best.

    The following is an edited version of an article from tunacan.net:

    VW clutches were available in 4 different diameters: 200mm, 210mm, 215mm and 228mm. The 200mm is the same pressure plate and clutch disc as a Type 1 200mm, so any of the high performance pressure plates and discs could be used. But keep in mind that a larger diameter clutch does not require as much spring pressure to stay connected. In other words you can have a softer pedal with more clamping power than a stock 200mm by using a 215mm or 228mm stock clutch. If you decide to use the larger clutches (210-228), make sure your transaxle is setup for the later style throw out bearing with the sleeve mounted in the transaxle. The pressure plates are only available without the ring in the centre.

    Disc: When it comes to clutch discs, there isn't much choice. For the larger size (210mm-228mm) the selections are pretty limited to the stock discs. The only things to keep in mind are selecting a rigid vs. a sprung disc and the quality of the disc. The sprung disc features springs in the clutch disc that makes engagement smoother and relieves the drivetrain the shock of the abrupt engagement. If you plan on running a Bus transaxle (002 or 091), go for the big one and run the 228mm pressure plate and disc.

    Flywheels: VW used four different flywheels, each having a different diameter clutch disc and pressure plate. The very early 411s used a 200mm clutch, thus it is compatible with the popular aftermarket Type 1 clutch discs and pressure plates. Next came the 210mm, 215mm, and finally the 228mm flywheels.

    The 914/912E flywheel had a 215mm diameter face and used a unique pressure plate and disc to mate it to the Porsche transaxle. This flywheel differs from the VW flywheel in that the starter ring gear is offset differently and will cause a VW starter not to engage properly.

    The Type 4 200mm, 210mm, and 215mm are all the same outside diameter and are basically identical with the exception of the clutch face diameter. The starter ring tooth count is the same as a 12V/200mm Type 1 (130 teeth). The 228mm flywheel has the same starter ring, but the raised portion on the outer edge of the flywheel makes it larger overall.
     
    nicktuft and Jonny Rock 66 like this.
  13. Thanks for that, good read and thanks for your advice.
     
  14. I'v read somewhere that its possible to use a 228mm flywheel from a water cooled t25. Is that possible?
     
  15. 77 Westy

    77 Westy Supporter

    I’ve never tried but a Wasserboxer flywheel has the same bolt pattern as an air-cooled type 4, it should fit but the ring gear might be different so check that to avoid starter motor problems. If it fits it’s a good option as apparently, they’re forged; all other VW type 4 flywheels are cast. If you try it let us know how you get on.

    You haven’t asked but just a note about lightening flywheels - for a bus don’t, unless you like to sit at traffic lights going vroom, vroom, vroom.
     
    Last edited: Oct 20, 2017
    Jonny Rock 66 likes this.
  16. Ha Ha, no vroom vroom for me, just what to get it right.

    I will investigate the later flywheel and I will report back, no sure if I read about it on a US forum.

    Thanks for your help.
     
  17. 77 Westy

    77 Westy Supporter

  18. Mmm, intersesting read.
    @3901mick has a 228mm bay one for me so will go with that for the moment.
     
    77 Westy likes this.
  19. MorkC68

    MorkC68 Administrator


    it will be a good one too. Ive had lots of type 4 parts from Mick, all excellent too :thumbsup:
     
    Jonny Rock 66 likes this.

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