Heat Rang & The Engine
Spark Plug heat range is suitable for the engine
When the temperature of spark plug insulator firing end is lower than the self-cleaning temperature and when heat range is too high, the carbon fouling will happen on the firing end and affecting the ignition performance. The temperature is too high when heat range is too low, Which easily cause pre-ignition, spark plug electrode melting, and have damage to the engine.
The nose area drawing heat of insulator is large and it¨s few send out the heat. Nose area smaller than that of heat spark plug and it¨s good to send out heat. The insulator nose area of drawing heat is little and it¨s fast to send out heat.