Then this is a fact I've never heard of. I just don't understand how you can imply that the spark plug could actually be some sort of heatsink for a 1500 degree chamber. The
chamber walls transfer the heat to the cooling system, not a puny ceramic stick. If one of the jobs of the spark plug were to be a heat sink, then the water cooling paths would be focused around the plug. The water paths of all engines circulate around or near the chamber walls. The job of the modern spark plug is to do two things: (1) Create the spark and (2) draw it's own induced heat away; not draw away the heat in the chamber. It's a potential
Heat Spot, not a
heat sink. And having a colder plug reduces that heat spot because it stays colder.
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Originally Posted by Import Power
Plugs pull heat out of the chamber and place it into the head. That heat is then carried away by the cooling system. This is not my opinion or thoery, it's known fact. It's one of the jobs of the spark plug.
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