Re: Spark Plugs

["Vince J. Pujalte" <pujalte@stic.net>]

Rick,
  As I recall, the heat range is a function of the length of the central 
electrode insulator. A longer insulator possesses a longer path for the 
heat to travel to the head. 
  Therefore: a longer insulator/path=a hotter plug.
  Hope this helps.

-Vince
San Antonio

  
Rick Jennings wrote:
> 
> What determines if a plug is "Hotter" or "Colder" then the standard plug?