308 single distributor magnetic pick-up | FerrariChat

308 single distributor magnetic pick-up

Discussion in '308/328' started by silvergt4, Sep 5, 2008.

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  1. silvergt4

    silvergt4 Rookie

    Nov 15, 2007
    12
    LONDON, UK
    Full Name:
    GILES AMOS
    #1 silvergt4, Sep 5, 2008
    I've got a euro 308 GT4 from '79 and it has the single distributor with OE electronic ignition like some late GTBs have. Does anyone know what the spacing should be between the two magnetic pick-ups and the distributor cam lobes ? The GT4 manual only gives info on points ignition cars.

    Thanks.

    Giles
     
  2. britalian

    britalian Karting

    Feb 10, 2006
    64
    Atlanta
    Full Name:
    LL
    #2 britalian, Sep 5, 2008
    Last edited by a moderator: Sep 7, 2017
    Hi Giles,
    We have an original 1979 Marelli specification sheet for the SM 805 A pickup sensor distributor that indicates the air gap should be 0.35mm - 0.45mm or 0.014 - 0.017 inches. This is very tight and they will usually work fine with a larger gap. Please be cautious because when things get worn or loose the shaft, plate, or sensors can move a little and allow the sensor to make contact with the teeth.
    Lee @ T Rutlands
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  3. silvergt4

    silvergt4 Rookie

    Nov 15, 2007
    12
    LONDON, UK
    Full Name:
    GILES AMOS
    #3 silvergt4, Sep 6, 2008
    Extremely helpful. Thank you.
     

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