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Mike Gray · 06-23-2015, 06:31 PM

Looks like more hype to sell expensive spark plugs. My Mazda rotary in 1979 came with plugs with 3 ground electrodes, my understanding was the plug fired easier to the cooler electrode and was needed because the rotary fires on each side of the rotor (3 per revolution) no exhaust stroke for the plug to cool. It also had 4 spark plugs, 2 per rotor.
I may have it all wrong but that's what I remembered from 36yr ago.LOL

06-23-2015, 06:31 PM	#3
Mike Gray Senior Member Join Date: Oct 2006 Posts: 519 Likes: 222 Liked 498 Times in 134 Posts	Re: E3 Racing Plugs Looks like more hype to sell expensive spark plugs. My Mazda rotary in 1979 came with plugs with 3 ground electrodes, my understanding was the plug fired easier to the cooler electrode and was needed because the rotary fires on each side of the rotor (3 per revolution) no exhaust stroke for the plug to cool. It also had 4 spark plugs, 2 per rotor. I may have it all wrong but that's what I remembered from 36yr ago.LOL Last edited by Mike Gray; 06-23-2015 at 09:38 PM.