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    Author Topic: spark plugs?  (Read 846 times)

    Offline JoeGrapes

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    spark plugs?
    « on: July 18, 2013 - 09:44:42 AM »
    What spark plugs are you guys using for Edelbrock Performer RPM heads on a 440 for the street? I was using Champion RC12YC which is what Edelbrock recommends but I found a 440 build from Car Craft that is almost exactly what I have and they use NGK R5671A-7 but these two aren't even close to cross referencing. 
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    Offline Strawdawg

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    Re: spark plugs?
    « Reply #1 on: July 18, 2013 - 10:06:36 AM »
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    Offline JoeGrapes

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    Re: spark plugs?
    « Reply #2 on: July 18, 2013 - 10:32:58 AM »
    Thanks STRAWDAWG, that's exactly the problem I'm having.
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    Offline cudabob496

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    Re: spark plugs?
    « Reply #3 on: July 18, 2013 - 06:38:41 PM »
    what plug is recommended for Mopar Stage VI heads with a 10.5:1 compression ratio?
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    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline brads70

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    Re: spark plugs?
    « Reply #4 on: July 19, 2013 - 05:41:25 AM »
    Quote from: cudabob496 on July 18, 2013 - 06:38:41 PM
    what plug is recommended for Mopar Stage VI heads with a 10.5:1 compression ratio?

     :popcorn:
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    Brad
    1970 Challenger 451stroker/4L60 auto OD
    Barrie,Ontario,Canada
    Proud to own one of the best cars ever made!!!!!

    My restoration thread 
    http://www.cuda-challenger.com/cc/index.php?topic=59072.0
     My handling upgrade post
    http://www.cuda-challenger.com/cc/index.php?topic=73985.0
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