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As stated by others here increased power through the plugs increases wear on them. I do know you can get a short term power gain at least until the spark plugs degrade but is it worth it in the long run? I don't think its economically viable. The only thing that would really work is a double cored plug with two coils feeding it and a separate electrode for each core.
Aircraft have two plugs per cylinder. The also use magnetos that produce a longer and hotter spark. This does give them more power but it does wear the plugs out quicker. To deal with this they go through a much more rigorous inspection and maintenance schedule. I think they are checked every 100 hours of operation.
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