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Racing Cross Reference Chart www.autolite.com TECHNICAL INFORMATION UNDERSTANDING HEAT RANGE Working closely with engine manufacturers, Autolite engineers have developed plugs in many heat ranges to suit all engine applications. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. Rules for selecting the correct
- Plug Tips Tell the Stor
your spark plugs regularly, and use this chart as a guide to...
- Plug Tips Tell the Stor
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
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.
your spark plugs regularly, and use this chart as a guide to spot performance problems. RECOMMENDATIONS 1. NORMAL Correct heat range of spark plug is being used. Replace with the equiva-lent Autolite spark plug at the proper interval. 2. NORMAL WITH RED COATING Normal - coloration is from the use of additives in unleaded fuel. 3. FUEL FOULED
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.
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.
The webpage provides a heat range conversion chart for Autolite spark plugs.
