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.054 Spark Plug Gap Missfire

Discussion in 'New Edge Cobras' started by 99cobra09, Apr 11, 2010.

  1. 99cobra09

    99cobra09 "Stock Car" Established Member

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    I just did the spark plugs and i have always ran the gap at .045, well i did them this time at .054 and theres a miss when the engine is in load. Most of the people here runs them at factory gap but i guess mine dosent like it, this isnt normal is it. Is it because im running a higher compression 10.1?
     
  2. qwik01cobra

    qwik01cobra built,novi2k,T56,solid Established Member

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    .45 or bust on N/A car
     
  3. IUP99snake

    IUP99snake The Shocker Established Member

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    I had a similar problem. I had plugs that were gapped at .54, and I had a real bad misfire in the higher RPM's. I gapped em down to about .37 and it fixed them! With an N/A car you might not need to gap them that small. .45 for an N/A car sounds about right.

    Homer
     
  4. Chris _Scott

    Chris _Scott NA FTW Established Member

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    funny, i was having misfirings from gaping mine too small..they were at like.. .027
     
  5. 99cobra09

    99cobra09 "Stock Car" Established Member

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    .027 is for like FI applications!

    What do you run them at now?
     
  6. na svt

    na svt say no to power adders Established Member

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    Autolite 754s, .54" gap with 10.8 to 1 here, no problems.
     
  7. Chris _Scott

    Chris _Scott NA FTW Established Member

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    Yup, they came out of another car and just tossed them in [I was just making sure that the spark plugs I had weren't bad]

    I recently just pulled them out now, and they're gaped around .040, I will be spraying nitrous.
     
  8. 99cobra09

    99cobra09 "Stock Car" Established Member

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    .040 i think is a good gap for nitrous, how much are you spraying?
     
  9. Chris _Scott

    Chris _Scott NA FTW Established Member

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    I am not spraying yet..but I will only be spraying a 75-shot, if that. Because I am still on a stock shortblock, so after the carb and spray I'll be at 460-475ish to the wheels.

    On the new shortblock.. 100-150 and will gap them closer for that.

    I have the nitrous kit just chillin in my room, waiting for my carb'd swap to get done so I can put it in!
     
  10. 99cobra09

    99cobra09 "Stock Car" Established Member

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    You definately have to make a thread of you carb swap, not many people go with that route but its going to be interesting!
     
  11. 19984V

    19984V New Member Established Member

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    I have my nitrous kit sitting in my room on the floor too! ;P Need it put in -.- I don't trust myself doing it lol.
     
  12. 99cobra09

    99cobra09 "Stock Car" Established Member

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    Nitrous is one thing that you really have to know what your doing. its very tricky!
     
  13. Brutal Metal

    Brutal Metal Active Member Established Member

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    a couple of the Die hard guys here ( na svt and Quad) say .054, I've never ran any Stang with a gap that Big even with an MSD box, I'm at .048 now!
     

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