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    Author Topic: Spark Plug Recommendation 340 6-Pak  (Read 1437 times)

    Offline cwestra

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    Spark Plug Recommendation 340 6-Pak
    « on: September 11, 2009 - 08:21:59 PM »
    The plugs I pulled out of my 340 6-pak were Champion N-10Y's.  The parts store spec'd out a resistor plug Champion RN14YC.  Which plug would be more appropriate for my engine?
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    Corey - in Northern Indiana


    Offline Oldschool

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    Re: Spark Plug Recommendation 340 6-Pak
    « Reply #1 on: September 11, 2009 - 08:33:38 PM »
    The 10's are colder plugs than the 14's.  I used to sort of meet in the middle in my hot rodded 340 and ran N12Y's on the street.  I kept a set of N9Y's for the strip.    :2cents:   


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    Ken  --  In Georgia

    MOPAR-------"Built To Run------Here To Stay"

    Offline hooD

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    Re: Spark Plug Recommendation 340 6-Pak
    « Reply #2 on: September 12, 2009 - 01:48:46 AM »
    Quote from: cwestra on September 11, 2009 - 08:21:59 PM
    The plugs I pulled out of my 340 6-pak were Champion N-10Y's.  The parts store spec'd out a resistor plug Champion RN14YC.  Which plug would be more appropriate for my engine?

    I asked the same question and 12's were recommended by members here.  But I had been running 9's for over 25 years, so I went back with a fresh set of RN9YC just last month when I changed the plugs.  No problems on my 340 4BBL.
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    -Larry
    member since AUG 2007
    http://www.youtube.com/watch?v=NvrWiLgDm7Y
    southeastern michigan usa
                 
     
                
    1973 'CUDA 340
     
    original owner
    37,117 miles
      
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