Spark plug basic concept Talk Ds 708

Change spark plugs Ds 708 need to be cautious when replacing you also need a basic concept, that is the calorific value. Cylinder where the temperature change is very large, the test proved that the spark plug insulator within the working temperature of 500 ° C -900 ° C is more suitable, regardless of the engine must meet this requirement. High compression ratio of the high-speed engine temperature, spark plug heat faster, low compression ratio, low-speed engines opposite, how to meet the different needs of the engine? It should spark plug design different calorific value, the difference between them is that the internal structure, we have to distinguish between them only through the heating value of the "degree" to discriminate.
Bigger spark plug of the commercially available heat value from 5 ° -13 ° value, the spark plug becomes "cold", i.e. a so-called cold-type, suitable for high speed and high compression ratio of the engine; smaller the value, the spark plug of the more "hot" (heat type), suitable for low compression ratio Ds 708 engines use.

Colder spark plug production is more sophisticated than the average product, so the engine high rpm, it can ensure the accuracy and quality of the ignition, so as to ensure maximum horsepower of the engine limit. Its resistance also be controlled very small, the number of times of ignition of the dense did not vary the speed increases uncollected. Therefore, the use of a higher degree of spark plugs habit pulled the engine speed of the shift or "racing" family is of great benefit. But if you switch to a high number of spark plug (not suitable for your car's engine), then there will be difficulty in starting, low-speed instability. Specifically, in Guangdong this subtropical weather, Autocom 5 ° -8 ° spark plug more appropriate (5 ° -6 ° ordinary car can be changed to 6 °, 7 ° 8 ° depending on the actual loading specific responses given, urban use regular motor recommends a maximum of 7 ° prevail), while more than 9 ° only racing in hot weather before the lingua franca. Also remind one only marked with international or factory standard code encoded on the spark plug, it is said that the structure of the form, the calorific value of degrees. However, the average consumer is unrecognizable, so before buying, please ask your dealer clear