I think I saw on the Internet they were worth 25 horsepower per plug. Or maybe it was a dyno test write up in a racing ragazine.
Yeah, right
Some magazine writers will say anything you want them to say if you pay them enough
Some don't know the truth from Baloney sauce so they will print errors, misinformation, also
As far as multiple ground straps on spark plugs aircraft engines have used what is known as massive gap dual ground straps as long as I have known about them
I can't remember the name of another short lived spark plug company that came out with the same basic principle years back, they aren't around anymore now so ?
