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Pertronix rotor rubbing

Discussion in '308/328' started by SteveG75, Jun 14, 2016.

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  1. SteveG75

    SteveG75 Formula Junior

    Nov 23, 2010
    380
    FL
    Full Name:
    Stephen
    #1 SteveG75, Jun 14, 2016
    So, got a better gear puller and got the bearing off the distributor shaft so I could install the Pertronix. Got it all back together and noticed that when I spun the shaft, the clearance between the Pertronix "rotor" and the sensors would vary from ~1/8" to just barely rubbing.

    Rotor went on just fine when I lined it up and pushed down over stock cam easily.

    Not sure what to do. Figure I will get it all back together tomorrow and if all 8 cylinders get a spark, then just drive it.

    Thoughts?
     
  2. Steve King

    Steve King F1 Rookie

    Feb 15, 2001
    4,367
    NY
    #2 Steve King, Jun 15, 2016
    Sound like to much variation. Check the shaft to make sure it is not bent and then make sure the pertronix wheel is seated correctly. Put a dial indicator on both and see what you get.
     
  3. pad

    pad Formula 3

    Sep 30, 2004
    1,426
    Tequesta, FL
    Full Name:
    Paul Delatush
    #3 pad, Jun 15, 2016
    ++

    Do not drive it as is. If the shaft has a "whip" in it, think what the rotor will do to cap. Something is obviously wrong.
     
  4. Fairview

    Fairview Formula 3

    Mar 16, 2009
    1,109
    Waynesboro, Virginia
    Full Name:
    Jeff Ward
    #4 Fairview, Jun 15, 2016
    Steve,

    If you have a twin distributor set up, try it on the other distributor and compare. Something sounds seriously out of wack. Are you using the MR183 Petronix?

    Jeff
     
  5. SteveG75

    SteveG75 Formula Junior

    Nov 23, 2010
    380
    FL
    Full Name:
    Stephen
    #5 SteveG75, Jun 15, 2016
    Pertronix 9MR-183. I tried taking it apart last night but can't get a good grip on the bearing with the Pertronix rotor and sensors in place. Only think I can think of is that I hammered the bearing back on too hard.

    Will have to see if I can get the distributor apart. AARRGGHHH!

    Maybe I should have gone for the Electromotive swap...
     
  6. SteveG75

    SteveG75 Formula Junior

    Nov 23, 2010
    380
    FL
    Full Name:
    Stephen
    #6 SteveG75, Jun 15, 2016
    Update:

    Got the distributor apart and checked runout. Shaft runout seemed pretty good.

    Pulled the front distributor out of the car, took out the innards and mocked up the Pertronix. It was better but still a lot of movement and the rotor piece would vary from ~2mm from the sensor to practically touching. It looks like the rotor piece is not perfectly symmetrical so I am going to call Pertronix tomorrow.
     
  7. SteveG75

    SteveG75 Formula Junior

    Nov 23, 2010
    380
    FL
    Full Name:
    Stephen
    #7 SteveG75, Jun 17, 2016
    Update #2.

    Looks like the trigger wheel is slightly off center. Talked to Carl at Pertronix and they are going to send me one asap. Awesome customer service.
     
  8. scowman

    scowman F1 Rookie

    Mar 25, 2014
    2,550
    Scottsdale AZ
    Full Name:
    Stu Boogie
    #8 scowman, Jun 18, 2016
    Guy at a local exotic service shop here who is an ignition specialist told me that pertronix parts have a lot of variation in the manufacturing tolerances. He also told me the cam lobes have a lot of variation from the factory. Remember the pertronix is retro fit so we can expect a lot of variation in figment.
     

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