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  • Spark Plug gap?

    In my 410W with about 10.4:1 comp I figure I try a little warmer NGK FR4
    An MSD6AL + Blaster 2 is feeding
    Looking around what spark plug gap would be recommended but varies from 0.035 to 0.06

    Any recommendations?

  • #2
    .035" Is my choice.

    But Everyone has their favorite #.

    So chime in, My fellow gear-heads.........

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    • #3
      Originally posted by 2700 Cast View Post
      .035" Is my choice.

      But Everyone has their favorite #.

      So chime in, My fellow gear-heads.........
      Yes 0.035 seams to be popular and I have run 0.045 without problems so I guess it is a matter of "trial & error"
      Less cap I guess will keep the coil happy for a longer period

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      • #4
        I ran .045 with my Mallory VI and compatible HEI coil, but back down to .035 with the ProFlo 4 system. FWIW when I was on the juice, the cold plugs were gapped at .025.

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        • #5
          Originally posted by CorkyE View Post
          I ran .045 with my Mallory VI and compatible HEI coil, but back down to .035 with the ProFlo 4 system. FWIW when I was on the juice, the cold plugs were gapped at .025.
          Thanks for the input!

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