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spark plug grade and type will influece the result, but not make power!
you cannot get more power by changine plug, but you can loose power by using the wrong plug.
multi electrode plugs do nothing but increase service life....NOTHING ELSE!
precious metal plugs offer increases efficiency because they can be thinner and the gaps larger. this can reduce mis fires and reduce cold/fouled plugs startup and rich mixtures.and increased service life
you cant imporve cylinder burning with a diff plug.
Nah I meant a complete ceramic tip, i remember a development sometime ago now where they had a plug that lasted a lifetime..not sure on the exact details or whether they are still available but definatley saw it either on Tomorrows World or Beyond 2000.