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And wider gap would MAYBE decrease spark strength...but with a longer spark, you're likely to ignite the mixture more reliably...
I think power and economy go hand in hand...If you can make more power, your engine is running more efficiently, and more efficiently, we'll....
I run copper plugs in my SVT with a slightly bigger gap. Ford coils are good and strong and can handle the extra gap.
Copper is a better conductor than all those rare metals...but wears faster.
Iridium is designed for long plug life, and are not the best electrical conductor.
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