jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
It's the type of driving that dictates what temperature heat range the spark plug should be. If you're racing the spark plug needs to be colder to shed heat faster. If you're driving on the street, even driving hard you will not maintain the heat in the plug like in racing. That's why I've always advocated for stock heat range in a street driven car.
https://ngksparkplugs.com/en/resources/understanding-spark-plug-heat-range
https://ngksparkplugs.com/en/resources/understanding-spark-plug-heat-range