308 Distributor and Rotor arm dimensions? | FerrariChat
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308 Distributor and Rotor arm dimensions?

Discussion in '308/328' started by Big Daddy, Jun 5, 2011.

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  1. Big Daddy

    Big Daddy Karting

    Jan 3, 2009
    212
    Albuquerque, NM, USA
    Full Name:
    RJ
    #1 Big Daddy, Jun 5, 2011
    I'm doing a little machining project to fit different, and affordable, Dist caps and rotor arms to my 81 GTSi. I have the original Marellis. Cost is a factor in how often I replace them, but I also find the screw clamped wires to be a PITA. The booted wires would be a lot easier for servicing, and as I sometimes track my car that would be a big advantage.

    Does any one have, or know where I can find, dimensioned drawings for these parts?

    I can do measurements with calipers, but a drawing would be more accurate.

    I'd like to adapt Saab/Fiat caps with the wires on the side. These are cheap and available, and would look good. Not original, but I don't have a show car. The rotors should match up well also. The stems need to be bored out to fit the cam, but that should be easy to do.
     
  2. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
    NY
    #2 Steve King, Jun 5, 2011
    I measured up the old caps once and will try to find the drawing. I wanted to make an adapter that takes a Volvo 740 cap and rotor. Never got to it yet but maybe some day I will.
     
  3. Big Daddy

    Big Daddy Karting

    Jan 3, 2009
    212
    Albuquerque, NM, USA
    Full Name:
    RJ
    #3 Big Daddy, Jun 5, 2011
    That would be a big help to get started.
     
  4. DWPC

    DWPC Formula Junior

    Mar 10, 2011
    733
    Sedona AZ
    Full Name:
    Dennis
    #4 DWPC, Jun 6, 2011
    Last edited: Jun 6, 2011
    I just put new ignition wires on my newly acquired QV and was fairly astounded at the antique style set-screw contact method used in the distributors; ironic considering it served an electronic ignition. Not to mention how each cap has one almost inaccessible screw making a simple task on other engines a stinker on the 308. The replacement cost for the distributor caps is ridiculous; similar side-wired cap for 70's FIATs are about $30.
     
  5. Big Daddy

    Big Daddy Karting

    Jan 3, 2009
    212
    Albuquerque, NM, USA
    Full Name:
    RJ
    #5 Big Daddy, Jun 6, 2011
    That is why I am interested in making an adapter set up. Please let me know if you can help with the dimensions.
     
  6. Big Daddy

    Big Daddy Karting

    Jan 3, 2009
    212
    Albuquerque, NM, USA
    Full Name:
    RJ
    #6 Big Daddy, Jun 6, 2011
    Last edited by a moderator: Sep 7, 2017
  7. Pero

    Pero Formula Junior

    Apr 22, 2011
    825
    Sweden
    Full Name:
    Peter R
    #7 Pero, Jun 12, 2011
    Interesting project. Keep us posted.
    /Pero
     
  8. lostbowl

    lostbowl Formula 3

    Apr 30, 2009
    1,246
    Michigan
    Full Name:
    Tom
    #8 lostbowl, Jun 13, 2011
    I was thinking (I know , don't) that what would make a better connection netween the HT lead and the dist. cap. Looks to me that pointed brass screw is a really good idea. Does anyone know of a cap with the same design we could modify to fit? Lost
     
  9. DWPC

    DWPC Formula Junior

    Mar 10, 2011
    733
    Sedona AZ
    Full Name:
    Dennis
    #9 DWPC, Jun 13, 2011
    Screw thread crimp-on end terminal are made (http://www.greenfarmparts.com/PhotoGallery.asp?ProductCode=HE167-1602) but the example is for a lawn tractor! I couldn't find any auto applications of screw-thread dist. connections, performance or otherwise.
     
  10. DWPC

    DWPC Formula Junior

    Mar 10, 2011
    733
    Sedona AZ
    Full Name:
    Dennis
    #10 DWPC, Jun 13, 2011
    FIAT cap?
     

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