Just a friendly question. How does the smaller gap help with the heat issue? Colder and hotter plugs are determined by the part of the plug that reaches into the combustion chamber. Hot range plugs have thinner and longer porcelain profiles and are used for stop and go conditions that may be fouling the plugs. Cold range plug profiles are thicker and shorter to help dissapate the heat in the plug out to the cylinder head to avoid high heat erosion.

Plugs have improved over the years by extending the heat range by using a thinner (hotter) profile to avoid fouling and by using a copper core on the center and side electrodes to mimick the properties of a cold plug by disapating the heat out of the plug and back into the cylinder head. Under the extreem conditions of racing you may have to go to a colder plug design.

I'm just curious as to why you think the gap should be reduced. Do you have any data on this issue that you can share? Thanks