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Thread: spark plugs?

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  1. #1
    Member
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    spark plugs?

    buying new plugs whitch ones do i need 03 whipple cobra 17lbs boost

  2. #2
    Senior Member silver03cobra's Avatar
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    Glendale
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    I would do NGK TR7IX Not sure about the gap...

    or

    NGK TR6

  3. #3
    Senior Member wickedcobra's Avatar
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    Aug 2007
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    QC/Gilbert
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    Gold Award 
    I have NGK TR6 in my Cobra

  4. #4
    Member
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    whats the difference between going one step colder than 2 steps colder on the plug?
    what do you think about those autolites AR94' s?

  5. #5
    Administrator BurnTire's Avatar
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    Dec 2005
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    Pittsburgh, PA
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    I use the NGK BR7EF. They are 2 steps colder and I have no idle or drivability issues.
    Sold
    2004 Cobra, Whipple ,TH-400
    Burning Corn
    9.97 - 135.5

  6. #6
    Senior Member santa_rosa_lt1's Avatar
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    Mar 2006
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    santa rosa,ca
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    would the br7ef be too cold of a plug for 12lb of boost?
    2003 svt Lightning
    chickenears cai

    bassani catback
    bassani catted mid
    LFP stage one W/ 4lb lower
    Fluidyne HE

    a little faster then stock.

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