Spark plugs which type?

1971 - 1974 Mopars

  1. Sebring

    Sebring FBBO Gold Member FBBO Gold Member

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    :luvplace:Hi there guys a quick question what type of spark plugs would you recommend for my 73 satellite with a 318 in it ? (Original motor with a mild cam) and the gap size too thanks in advance, sebring
     
  2. slepr1

    slepr1 Well-Known Member

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    NGK #GR4
    .035 gap
     
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    • ODZKing

      ODZKing Well-Known Member

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      Rock auto has excellent prices on plugs, that is where I purchased my NGKs for my 73 and 67.
      One comment, many recommended the NGK plugs over the Champion. Everything is a matter of preference certainly but I noticed no difference between the two. Yes I would get the NGK plugs again but as far as I can see, nothing wrong with Champions as well. My 2 cents.
       
    • Sebring

      Sebring FBBO Gold Member FBBO Gold Member

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      Thanks to all much appreciated
       
    • Sebring

      Sebring FBBO Gold Member FBBO Gold Member

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      While I've got your attention what about wires and cap?
       
    • ODZKing

      ODZKing Well-Known Member

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      I ordered Mopar wires from Chrysler, dealer item. Cap from NAPA, they have the correct color (tan).
      Summit Racing or Jegs as well.
       
    • Sebring

      Sebring FBBO Gold Member FBBO Gold Member

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      Thanks
       
    • mopar73dge

      mopar73dge Well-Known Member

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      I used Bosch platinum no tip for 15 years ran great switched to NGK for a few years until I found a NOS set of Mopar Champion in the boxes, they work great the car has good power. The plugs are well plated on the outside too.
       
    • ODZKing

      ODZKing Well-Known Member

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      As I said before, many recommended the NGKs over the Champions and when asked why, some replied that the Champion plugs now came from China or Japan. Where do you think NGKs come from? Japan!
      I have had fairly good luck over the years finding NOS Champion plugs at flea markets at car shows. Know what you need before you look and buy as many as you can if they have them.
      The original Service Manual calls for N13Y for 318 2bbl.
       
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      • Sebring

        Sebring FBBO Gold Member FBBO Gold Member

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        Thanks for the info :luvplace:
         
      • 71Beeper

        71Beeper Well-Known Member

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        Try the NGK Iridium tip plug - an excellent plug.
        They are pre-gapped, so no need to set the gap on them.
         
      • Sebring

        Sebring FBBO Gold Member FBBO Gold Member

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        Thanks Beeper,would there be a number to go with these plugs? Ps l used to live in Kitchener
         
      • idrivemopar

        idrivemopar Well-Known Member

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        I wouldn't count on the gap being 100% on, always check your stuff before you install.

        You can always use Champion plugs, I don't know why everyone doesn't like em, I am running RN12YC in my 340 and she is running much better with the carb tuned and a cooler plug that what my builder recommended. If your engine is stock or close to it, the recommended plugs in the owners manual should be just fine!
         
      • Dennis H

        Dennis H FBBO Gold Member FBBO Gold Member

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        NGK. Everything I own.
         
      • 71Beeper

        71Beeper Well-Known Member

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        Here's the listing from the NGK website.....
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        • Slap Stick

          Slap Stick Well-Known Member

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          Isnt the n9y the stock plug for a 340? If so s n14y is hotter, not colder if my pornographic memory serves correctly.

          I'm running Autolite 3923s, one step colder in my 318.
           
        • RJRENTON

          RJRENTON FBBO Gold Member FBBO Gold Member

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          Gentlemen,
          Which spark plugs are best is a matter of personal preference. Many people feel NGK or AUTOLITE or BOSCH or Champion or even AC are best. Reason: mostly based on personal "feeling" that the car runs better, starts easier, gets better fuel mileage, sounds good, etc. Cost and availability are important issues as well.
          Some guys swear by ________ (fill in the blanks) is very much akin which beer is best........domestic vs import vs light vs laugher vs pilsner vs ......
          I believe which plug is best is up to the individual based on some trial and error experiences. If sone one recommends say NGK of a certain design, heat range and features and you purchase the recommended brand and type and the result is a damaged engine.....who will be blamed?? Do your own du dilligance. There are many engine variables that effect spark plug selections: compression ratio, spark advance characteristics, fuel distribution, cam selection, operating conditions, final drive ratio, etc. If contemplating a change proceed cautiously.....its far easier to replace a cold fouled plug than to replace "holed" piston or damaged valve. Do not be influenced by price or someone else's opinion.
          In my 1970 RS23V0A GTX, l use Champion UJ-11G or Champion HO-8A.....because this is what works for me. In my instance...this is what's best....for me.
           
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          • onlyone

            onlyone Bird of Pray FBBO Gold Member

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            Many variables, but if you are running a basic stock 318.
            (This one has 360 heads. Cop motor).
            My daily driver.
            Almost 80 miles a day 5 days a week for 15 years and across country twice before that.
            Two nights ago it started running rough on the way home from work.
            What I found.
            This is the second time I've worn out AP65s in it that I remember.
            Can't say for sure that I've ever run anything else.
            Tips eroded and the car was still running fine.
            That's what I use.
            Shout out to FBO Systems for a very good spark in a stock looking box.
            It was throwing almost 1/2 inch to the manifold.
            Wonderful product.
            Car really gave me no indication of a problem till the wires let go.
            (I've been busy and this car has been neglected. What can I say.)

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            Last edited: Jun 18, 2019
          • onlyone

            onlyone Bird of Pray FBBO Gold Member

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            For reliability, I wouldn't run anything else.
            Most important to me.



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          • 72sunroof

            72sunroof Active Member

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            Correct ND this is the correct plug to run on this 318. With ethanol you may even need to go colder n7y.
            Running Champions in my very warmed over 340, 0 issues and great power.
             
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