Calorific value
The so-called calorific value can be understood as heat lost, of course this is only a figurative explanation.
Calorific value is divided into three grades and nine grades, from 1 to 9. 1-3 is a low calorific value, 4-6 is a medium calorific value, and 7-9 is a high calorific value.
Usually the more high-performance engine uses a higher calorific value spark plug (the better the heat dissipation).
Is the higher the better when selecting the spark plug heat value?
The answer is no, it has to be the right choice.
Because the general engine chooses high calorific value spark plug, the working temperature of the spark plug can not reach the best state but will affect the ignition performance.
Therefore, choose the spark plug as long as the original factory matching heat value replacement is good, there is no need to choose too high
