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Message: <blockquote data-quote="turbology" data-source="post: 375916" data-attributes="member: 10223">May I add:  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />1. Almost all gasoline engine run at about the same temp. The different Is the cooling speed (energy draw away from combustion).2. In order for spark plugs to work correctly, it need to be at 500c to 950c, with most running around 800c to 850c during lean cruising speed. Higher temp reduce carbon deposit.3. The temperature of Spark plug's insulator tip is usually the actual temperature within the combustion chamber.4. 90% of the combustion heat is transfer to engine block through spark plugs. Thus, you have heat range for spark plugs. With cooler type transfer more heat to engine block faster.5.. You can cool the running temperature down with richer mixture, alcohol/NOs/etc. Is also one of the reason higher RPM or high boost require richer AFR to prevent spark plugs fouling/pre-ignition.What I know:1. Gasonline are heated/warm through heat from engine block before it enter the combustion through injectors. Warmer gasoline "vapourize" better, provide better Volumetric Efficiency and MPG. 2. Fuel won't burn when it enters the combustion chamber regardless how hot it get.(Unless is glowing hot). You still need spark. We use gasonline, not diesel <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /></blockquote>

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