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• HIGHER Heat Range • HOT PLUG Each engine has different temperature characteristics; typical plug temperature ranges are illustrated on the right. Heat is conducted away from the firing tip through the (1) insulator to (2) the spark plug shell to (3) the cylinder head. Thus, heat ranges are primarily controlled by the length of the insulator
Working closely with engine manufacturers, Autolite ® engineers have developed plugs in many heat ranges to suit all engine applications. Here you can enter the make, model, and year of your car to find the best spark plug for you in the correct heat range.
Head manufacturer’s original equipment heat range starting point or equivalent plug shown in bold print. * Engine performance modifications, fuel requirements, comp. ratio, domed pistons, high speed driving conditions, etc. may require colder spark heat range or different
29 Δεκ 2014 · Autolite Heat Ranges - The larger the last digit in the part number, the hotter the plug is. Example a AR3935 (good street/strip plug) is hotter than a AR3932 plug which is very cold used for lots of nitrous.
11 Μαΐ 2018 · Many race plugs like the Autolite AR series plugs come with side-cut ground straps that are much shorter and also eliminate shrouding of the spark into the combustion chamber. This is equal in importance to the heat range question.
Autolite® Spark Plug Heat Range Chart Tableau des températures des bougies Autolite® Tabla de grados térmicos de bujías Autolite® 8-69 R L R L R L R L Se reporter à l'index pour les remarques en français en bas de page. Ver el índice para las páginas de notas de pie de página en español.
2 Φεβ 2020 · Chart is for racing plugs, so not a direct equivalent to NGK street plug part number. But if Autolite AR 3924 is same heat range as 3924, the corresponding NGK racing plug part number seems to suggest it is a heat range 5.
