Spark plug gap, Jarama | FerrariChat

Spark plug gap, Jarama

Discussion in 'LamborghiniChat.com' started by lazaruslong, Sep 4, 2012.

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  1. lazaruslong

    lazaruslong Karting

    Joined:
    Aug 9, 2006
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    The OM for the Jarama S states that the gap should be 0,35 mm but I've seen other figures too. In any case, 0,35 mm seems to be a very small gap to me.

    I pulled the plugs the other day, installed by the PO, and they were all approx 0,6 mm.
    Bosch 235 P 21.


    What is correct?
     
    lazaruslong, Sep 4, 2012
    #1
  2. MiuraP400

    MiuraP400 Formula Junior

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    Location:
    Arizona
    Full Name:
    Jim
    0.025 inches or 0.635 mm is correct. Almost all cars ran with this gap prior to electronic ignition. Once electronic ignition was introduced, the gap increased.

    Cheers Jim
     
    MiuraP400, Sep 4, 2012
    #2
  3. garybobileff

    garybobileff Formula 3 Sponsor

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    Full Name:
    Gary
    The tight spark plug gaps works great at 6,000 RPM, considering the profile of the piston and combustion chamber. But to be practical for street use, of which most cars see red lights and stop and go traffic, I personally open the gaps to about 0.025".
    Gary Bobileff
     
    garybobileff, Sep 4, 2012
    #3

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