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yes another plug question

Discussion in 'Early CJ5 and CJ6 Tech' started by cj6/442, Mar 18, 2009.

  1. Mar 18, 2009
    cj6/442

    cj6/442 Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
    Messages:
    2,734
    did the search- I pulled champion rj12yc from my 225/2g bl. /HEI, offy intake w/headers are these close to what I need ?the gap was .050
     
    cj6/442, Mar 18, 2009
    #1
  2. Mar 18, 2009
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,524
    gap should be .035 I think, been so long...
    J12Y is the factory plug; I suppose J12YC would be the current version
    you have the resistor version

    HEI might use the .050 gap
     
    jpflat2a, Mar 18, 2009
    #2
  3. Mar 18, 2009
    cj6/442

    cj6/442 Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
    Messages:
    2,734
    anyone...........what plugs are you running in your HEI 225?and gap??????
     
    cj6/442, Mar 18, 2009
    #3
  4. Mar 19, 2009
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    The better question might be "What color are the plugs you are using now?"

    If they are black and sooty you may need to bump up a heat range or two, and if they are white and crusty they might be too hot.

    Here is a good reference: http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

    .035 is the factory plug gap recommendation for a point-type ignition, and .060 for an HEI setup. HTH. :)
     
    w3srl, Mar 19, 2009
    #4
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