Spark Plug Opinions

[co5j]

Look us up in Welcome Wagon for backstory. Found some damaged and basically old plug wires on the 440 6bbl, ordered a Blue Max set from Summit, figured if im gonna change the wires, given their condition, might as well put new plugs in. Any advice or opions on type, brand etc? Mild mods to engine, nothing drastic. Thanks.

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[Ronbo73]

Look us up in Welcome Wagon for backstory. Found some damaged and basically old plug wires on the 440 6bbl, ordered a Blue Max set from Summit, figured if im gonna change the wires, given their condition, might as well put new plugs in. Any advice or opions on type, brand etc? Mild mods to engine, nothing drastic. Thanks.

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I use Champion plugs in my 440 6brrl. She starts right up and idles great. 1K miles on them so far.

 

[Challenger RTA]

Same here.

 

[Chryco Psycho]

Champs or Autolites
Big blocks use RJ12YC small blocks use RN12YC
big block Alum heads often use RC12YC

 

[Xcudame]

I've run Champion RJ12YC in my 70 Challenger 383 for years with no problems. Usually re-gap them every 10,000 miles and replace them every 30,000 miles.

 

[KlsCuda]

Here comes the spark plug debate lol. I've used many, currently running Autolite 85s in my 440-6pack with no issues.

 

[WhiteGP]

Look us up in Welcome Wagon for backstory. Found some damaged and basically old plug wires on the 440 6bbl, ordered a Blue Max set from Summit, figured if im gonna change the wires, given their condition, might as well put new plugs in. Any advice or opions on type, brand etc? Mild mods to engine, nothing drastic. Thanks.

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I'm running the Champions in my 440 with no issues at all, but I have had a few people tell me they prefer the Autolites

 

[my70cuda]

using ac delco R45S since 1982 never fouled a plug