[Excaliber]

Hmmm, assuming there is enough 'fire' from the plug to light off the mixture I'd certainly rather run rich than lean. My 'gutt' tells me rich would not have as big an impact on trap speed\power at top end as lean would. Unless it's super rich to the point of having a big impact on h.p., I would think the extra fuel is simply 'blown out' the exhaust.