Spark plug electrode burning off

Discussion in 'PSI Superchargers Tech Questions' started by Flyboy68, Sep 21, 2015.

  1. Flyboy68

    Flyboy68 Member

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    What causes the electrode to burn down closer to the porcelain causing bigger plug gap? Only happened on one plug but we had a misfire the whole run...and back firing. plugs had 3 runs. plug wires have 27 runs.

    BAE520 promag 44 w/ grid, roots
     
    #1
    Flyboy68, Sep 21, 2015
  2. TADHemiracer

    TADHemiracer Member

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    Burnt ground strap

    To me, it sounds like a lean cylinder. Any data to show temps?
     
    #2
    TADHemiracer, Sep 21, 2015
  3. Flyboy68

    Flyboy68 Member

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    egts are around 1000. not sure on cyl temp
     
    #3
    Flyboy68, Sep 22, 2015
  4. Mike Canter

    Mike Canter Top Dragster
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    Pretty unusual to take out the center electrode vice the ground strap. The ground strap gets exposed to high temps and detonation a lot more than a center electrode. My guess is a bad plug from the factory.
     
    #4
    Mike Canter, Sep 22, 2015

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