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  #1  
Old 07-26-2007, 02:26 PM
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PistolGrip440-6 PistolGrip440-6 is offline
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Default Plug Reccomendation for a stock 383

Can anyone reccomend me a plug for a stock 383 in a '69 Road Runner? its going to need to run on 93 or 94 octance. I was hoping to use a champion.
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Old 07-26-2007, 10:52 PM
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ehostler ehostler is offline
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Champion RJ12YC
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Old 07-27-2007, 12:55 AM
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REALLY?! I was actually thinking of that but wasnt sure if it was the right one! Haha, I cant beleive it!
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Old 07-27-2007, 11:04 AM
wilks3 wilks3 is offline
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I ran the RJ12YC plug but kept getting alittle ping once in while with engine tuned as best as I could get it for overall driving. I talked to my engine builder and he recommended a non-projected plug tip. I changed over to NGK BR6S, stock #3522, and the .060 over 440 likes them better. No more ping at all with no other adjustments.
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Old 07-27-2007, 03:05 PM
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Hmmm, I thinkk I should be alright then, since the 383 is smaller
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Old 07-27-2007, 06:12 PM
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NGK XR5 is what I run in my 400.
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Old 07-27-2007, 07:12 PM
cudabob496 cudabob496 is offline
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Mopars like NGKs!
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Old 07-28-2007, 09:53 PM
unclemike unclemike is offline
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318 mopars don't like Champions mine kept fouling plugs and I figured it was time for a rebuild. I switched to Autolite #66 and haven't had anymore problems. We ran a set of Bosch platinum tips in one of our Neons and kept getting multilpe cylinder misfire codes switching to the Autolite plugs cured that too. The only time I had a problem with them is when I put a set of #63s in a 1968 Plymouth 318. After a year it wouldn't start because the plugs were fouled. Too Cold heat range.
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