Cold Spark Plug Is Used in Which Engine
The Champion plug is RA8HC and it is the exact same heat range minus the spark knock capability. All are correct DAll are correct. Hot Spark Plugs Vs Cold Spark Plugs Vermont Auto Enthusiasts I have a lot of people come to me wanting a hotter spark plug to get their engine to start better in cold weather. . If the spark plug were to get too hot it would ignite the fuel before the spark even fired. Within the Autolite family this particular plug is toward the hotter side of the range that runs cold-to-hot 3922 3923 3924 3926. It has ion sensingspark knock capability. Most competition engine builders commonly choose a colder heat range plug to prevent possible engine damage. If the tip temperature is lower than 500C the insulator area surrounding the center electrode will not be hot enough to burn off carbon and combustion chamber deposits. A cold plug can get rid of heat very quickly and should be used in engines that run h...