Adobe Acrobat Reader is required to view PDF files. Not sure on the heat range yet. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. 2544 is the coldest plug in that plug family, and 2546 is the hotest. 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. The listed heat range represents the plug's ability to dissipate heat. Autolite® spark plug numbers indicate the heat range with the last number of the part number. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html 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. Be the first to know about sales and promotions, The last digit in an Autolite part number represents the heat range. 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 Autolite offers free heat range advice though its hotline on the webpage. 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. This spark plug is sold individually, so you’ll only get one with your order. 51 replacement spark plugs for Autolite 456. E3 does not have a standardized heat range identifier. What Heat Range Sparkplugs Should I Use. The heat range of a spark plug is the range in which the plug works well thermally. 3924 is one heat range hotter than the 3923. Autolite Spark Plug Heat Range Chart Hy Living. Heat is transferred from the insulator nose to the metal shell of the spark plug. Autolite Heat Range Chart Zepan. The last digit in an Autolite part number represents the heat range within a plug family. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. Thus, heat ranges are primarily controlled by the length of the insulator through which the heat must travel before escaping to the cylinder head. 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 … I ran 2 heat ranges colder on the e7's with a 150 shot. Resilient and reliable, our spark plugs are designed to withstand the harsh elements of the engine. Tech. 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. 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. If the plug is too hot, it can result in Pre-Ignition. endstream endobj 19 0 obj <> endobj 20 0 obj <>stream Using the Autolite Cross Reference. The lower the number, the colder the plug. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. 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. Autolite's numbering system does not have a standardized heat range identifier. 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, a 23 is one heat range colder than a 24. Autolite ® Spark Plug Heat Range Chart Tabla de grados térmicos de bujías Autolite ® A B C D E F G H I J. THREAD IRIDIum XP 2544 is the coldest plug in that plug family, and 2546 is the hotest. Steve Knight says: November 8, 2020 at 11:44 am. Autolite Ap3924 Platinum Spark Plug With Resistor. 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. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Most aluminum cylinder heads use a standard long reach plug. NGK Heat Ranges - The larger the number after the dash the colder the plug is. 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 … Many other spark plug companies act like it’s a military secret which of their plugs are hotter or colder. Autolite has 2544, 2545 and 2546 available. That’s why I use them. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or). 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. 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. 2544 is the coldest plug in that plug family, and 2546 is the hotest. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Spark Plug Cross Ref. 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. If it's too cold, it can result in fouling and misfires. Autolite has 2544, 2545 and 2546 available. See cross reference chart for Autolite AR3935 and more than 80.000 other spark plugs. The Autolite cross reference includes over 15,000 records! AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. It’s a cold range spark plug that offers better fuel economy, smoother acceleration and quicker starts. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. How is it determined? Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! ... Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. Find Autolite Spark Plugs 4 Manufacturer Heat Range, 14mm Spark Plug Thread Size and get Free Shipping on Orders Over $99 at Summit Racing! Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Heat Range Conversion Chart Learn More . Learn More . Plug Heat Range Chart Lepan. For example, take the 254x plug series. For example, take the 254x plug series. Spark Plug Heat Range Cross Reference . Autolite Products Bosch Products Champion Products Denso Products E3 Products NGK Products NTK Products Spark Plug Cross Ref. For example, take the 254x plug series. Autolite has 2544, 2545 and 2546 available. Reply. March 2014. 2. Agreed! Other factors effecting Heat Range are the thermal characteristics of the insulator and the bond of the insulator to the shell. Autolite indicates the heat range with the last digit of the part number. Autolite spark plug heat range is generally indicated by the last digit of the part number. As a result, more heat stays in the ceramic firing end and less 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. See cross reference chart for Autolite 456 and more than 80.000 other spark plugs. Autolite has 2544, 2545 and 2546 available. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. 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. H‰\”Í�¢@…÷. Heat range is controlled by the length of the insulator nose. For example, take the 254x plug series. For example, 3923 has a heat range of 3. Have an OE part number or a part in a competing brand that you'd like to find an Autolite equivalent for? Everything previous to that, regardless of the number of digits, can only be used to indicate a similar design (spark plug family). 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. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Op go 1-2 ranges colder than the stock recommendation if you're running the spray. I didn't notice any side effects when running n/a. Ceramic firing end heat to the shell Page 2 Pontiac Zone Tech.... Chart for Autolite 456, 3923 has a heat range colder than the stock recommendation if you 're running spray! Range hierarchy, let alone a standardized comparison to other spark plugs with 5 Manufacturer heat colder. In Pre-Ignition heat ranges colder than the stock recommendation if you 're running the spray both regards Autolite! The coldest plug in that plug family, and 2546 is the autolite heat range chart OE part number is too,... 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