![]() But if the spark gap is too small, there won’t be enough room for the airfuel mixture between the ground electrode and center electrode. This makes it critical to engine performance.Ī smaller gap ensures the spark plug fires on each cycle. The spark plug gap influences the heat range of the spark produced to ignite the air fuel mixture in the combustion chamber. Setting the correct gap distance is called “gapping” the spark plug.īut why is the spark gap significant? Why Is The Spark Plug Gap Important? This gap width is critical so electrical arcing (a “spark”) can occur at the right voltage, igniting the air fuel mixture in an engine’s internal combustion chamber. The spark plug gap defines the distance between a spark plug’s center electrode and the ground electrode (also called a ground strap which is a curved piece of steel at the end of the plug). ![]()
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