How is it determined? I didn't notice any side effects when running n/a. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. 6 replacement spark plugs for Autolite AR3935. Everything previous to that, regardless of the number of digits, can only be used to indicate a similar design (spark plug family). Autolite has 2544, 2545 and 2546 available. Heat Range Facts; Half Thread/Full Thread Explanation; Autolite Copper Core Spark Plug Attributes; Understanding VIN Codes; Autolite Double Platinum Spark Plug Attributes; Original Equipment Platinum Spark Plug Applications; Spark Plug Cross Reference; Racing/High Performance Spark Plug: Heat Range Facts; Busting the OE Spark Plug Myth For example, take the 254x plug series. Spark Plug Cross Ref. Autolite offers free heat range advice though its hotline on the webpage. Tech. This spark plug is sold individually, so you’ll only get one with your order. endstream endobj 19 0 obj <> endobj 20 0 obj <>stream That’s why I use them. The higher the number, the hotter the plug. Heat Range Conversion Chart Learn More . Find Autolite Spark Plugs 4 Manufacturer Heat Range, 14mm Spark Plug Thread Size and get Free Shipping on Orders Over $99 at Summit Racing! Autolite Spark Plug Heat Range Chart Hy Living. E3 does not have a standardized heat range identifier. ... Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. A “hot” spark plug lengthens the depth of the ceramic which lengthens the distance from the center electrode end of the plug to where it … They have the easiest choice of heat range offerings, clearly defined. Autolite has 2544, 2545 and 2546 available. Most aluminum cylinder heads use a standard long reach plug. The lower the number, the colder the plug. The Cold War Heats UpBig horsepower means more heat, so when it comes to choosing a spark-plug heat range, the best advice is also the simplest-put spark plugs in the engine that will live. H‰\”Í�¢@…÷. Op go 1-2 ranges colder than the stock recommendation if you're running the spray. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. autolite ®® technical information ar12 12 rv9yc r5674-7 ar13 13 rv9yc r5674-6 ar23 – rv9yc bpr6fs ar24 – rv12yc bpr6fs ar25 – rv15yc4 ur4 ar32 32 rf9yc ap8fs ar33 33 rf9yc ap7fs ar50 50 n59yd r5672a-10 ar51 51 n61yd/n6yc r5672a-9 ar52 52 n63yd/n7yc r5672a-8 ar53 53 n9yc bp6es ar72 72 j12yc r5670-7 ar73 73 j12yc r5670-6 ar74 74 j12yc r5670-6 However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. In both regards, Autolite … 2544 is the coldest plug in that plug family, and 2546 is the hotest. Heat range is controlled by the length of the insulator nose. If the plug is too hot, it can result in Pre-Ignition. Autolite has 2544, 2545 and 2546 available. Autolite Ap3924 Platinum Spark Plug With Resistor. I ran 2 heat ranges colder on the e7's with a 150 shot. March 2014. The last digit in an Autolite part number represents the heat range within a plug family. As a result, more heat stays in the ceramic firing end and less is … 2544 is the coldest plug in that plug family, and 2546 is the hotest. I know that I'm going with autolites. NGK Heat Ranges - The larger the number after the dash the colder the plug is. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. Vine Racing Spark Plugs Page 2 Pontiac Zone Tech Forums. Autolite's numbering system does not have a standardized heat range identifier. Be the first to know about sales and promotions, The last digit in an Autolite part number represents the heat range. 51 replacement spark plugs for Autolite 456. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. The heat range is established by the distance the heat in the center electrode and insulator ceramic must travel before it contacts the steel body of the spark plug. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html 2544 is the coldest plug in that plug family, and 2546 is the hotest. Inside the cylinder, spark plugs are subjected to severe conditions such as 25,000 volts or more of electricity, temperatures reaching 4,000 degrees Fahrenheit, and pressure up to 2,000 psi. Have an OE part number or a part in a competing brand that you'd like to find an Autolite equivalent for? NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. See cross reference chart for Autolite 456 and more than 80.000 other spark plugs. Not sure on the heat range yet. NGK Part Finder. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or). Autolite indicates the heat range with the last digit of the part number. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. For example, 3923 has a heat range of 3. I have yet to do my homework on plugs for my new heads. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Autolite Products Bosch Products Champion Products Denso Products E3 Products NGK Products NTK Products Spark Plug Cross Ref. Autolite® spark plug numbers indicate the heat range with the last number of the part number. MC�°8°(¸;p§Š¢hêD­(޸E›"€»q³¥D�kNÕl±é±Êc¿ Ûvk Autolite has 2544, 2545 and 2546 available. Using the Autolite Cross Reference. AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. 2544 is the coldest plug in that plug family, and 2546 is the hotest. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type. If it's too cold, it can result in fouling and misfires. Other factors effecting Heat Range are the thermal characteristics of the insulator and the bond of the insulator to the shell. Use this handy chart to determine the best spark plug for your heat range selection, or cross reference the racing spark plug you are currently using to try a different brand of spark plug. For example, take the 254x plug series. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. Steve Knight says: November 8, 2020 at 11:44 am. 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. Thus, heat ranges are primarily controlled by the length of the insulator through which the heat must travel before escaping to the cylinder head. Heat is transferred from the insulator nose to the metal shell of the spark plug. Heat Range Reference. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Autolite has 2544, 2545 and 2546 available. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. 2. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. Many other spark plug companies act like it’s a military secret which of their plugs are hotter or colder. For example, the Autolite 3924 is a VERY commonly used plug in engines making up to about 600 HP or so, and it's a heat range … This Autolite Spark Plug is a cold range spark plug that’s compatible with 289, 302 and 351W engines with nitrous, supercharger or high compression engines. Autolite spark plug heat range is generally indicated by the last digit of the part number. 3924 is one heat range hotter than the 3923. Ver el índice para las páginas de notas de pie de página en español. Agreed! For example, a 23 is one heat range colder than a 24. For example, take the 254x plug series. 2544 is the coldest plug in that plug family, and 2546 is the hotest. The heat range of a spark plug is the range in which the plug works well thermally. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. Autolite has 2544, 2545 and 2546 available. Learn More . Anatomy Of A Spark Plug Turbo Dodge Forums. Resilient and reliable, our spark plugs are designed to withstand the harsh elements of the engine. Adobe Acrobat Reader is required to view PDF files. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! Reply. For example, take the 254x plug series. What Heat Range Sparkplugs Should I Use. Autolite has 2544, 2545 and 2546 available. Spark Plug Heat Range Cross Reference . 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