The recent discussions about surface gap plugs and now the fouling issue started me to wondering.... it seems to me if a surface gap plug were available that, when seated fully, the end of the electrode and it's surrounding grounding area was around .005" or so away from extending beyond the surface of the rotor housing, the full spark energy would be just about in direct contact with the combustion chamber.  Does anyone know how deep into the housing the end of a typical plug is?  Seems like this would optimize combustion by eliminating the need for the mixture to be ignited from within the spark plug hole.  Just a thought.

  <marv>