Plugs vs. Boost

[Clarence L.Snyder]

> A longer insulator does result in a hotter plug because it lengthens the
> distance between the hot plug tip and the cooler cylinder head.  If the
> insulator is shorter, the heat has a shorter distance to traverse in order
> to disipate into the head.
> 
> --- John Teller
There are two issues here.
The long heat path makes a hotter plug, but an extended tip makes a
wider heat range, as the tip cools in the"airflow"when the valves open.