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Anyone running E3 spark plugs in race engines? Problems?

I wouldn't think of wasting my time and money on those type spark plugs This is based on my racing for many years and my personal expereinces on piston powered airplane engines. Some airplane engines use what is known as massive gap spark plugs (see the picture),they have to be cleaned and regap on every annual or 100 hour inspection. They wear out after about 500 hours The spark plug companies, Champion, came out with fine wire spark plugs and they last 1500 hours + On a race engine you want as much of the flame front exposed to the combustion chamber as you can get, hence the side gap on the extended tip racing spark plugs Save your money and buy a decent wide ban and tune your motor up to help keep the spark plugs clean

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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)