Posted by El Hombre on July 22, 2017 at 15:14:12 from (172.58.73.46):
In Reply to: Spark Plug Analysis posted by Royse on July 22, 2017 at 12:21:27:
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My experience as well. Mopar came stock with Champions, Ford had Autolites, and GM AC plugs. The plug companies had a mission to build a plug that worked in the associated OEM.
So we always used what the factory installed. Seemed to work best. Bosch in the german, NGK or Denso in the Jap, Champion in anything else.
I worked with a guy that had an '80 Alfa Romeo spider. He tried all the plug brands and never could get the plugs to last. Finally he got a set of Lodge, british plugs, and that fixed it. He found the Lodge advise in a shop manual he'd just bought.
30+ years ago, Champion had Gold Palladium plugs, same thin wire electrode as the Iridium style. Haven't seen them for decades, but if I had a difficult to R+R a set of plugs, that's what I'd use.
Up until the mid '80s, Champion was probably the most developed of the plug makers. I bet they got bought by something bigger and they ------ all that away.
TRIVIA; What does the AC on those plugs represent???? NO web searching; you either know it, or you don't. Trivia was a lot more fun before the net....
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