Autolite's numbering system does not have a standardized heat range identifier. Thus, heat ranges are primarily controlled by the length of the insulator through which the heat must travel before escaping to the cylinder head. 3924 is one heat range hotter than the 3923. What Heat Range Sparkplugs Should I Use. Autolite Ap3924 Platinum Spark Plug With Resistor. Spark Plug Cross Ref. I didn't notice any side effects when running n/a. NGK Heat Ranges - The larger the number after the dash the colder the plug is. For example, take the 254x plug series. 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. Spark Plug Heat Range Cross Reference . Autolite® spark plug numbers indicate the heat range with the last number of the part number. 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 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. 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. Ver el índice para las páginas de notas de pie de página en español. Everything previous to that, regardless of the number of digits, can only be used to indicate a similar design (spark plug family). Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. The last digit in an Autolite part number represents the heat range within a plug family. The lower the number, the colder the plug. ... Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. 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. Have an OE part number or a part in a competing brand that you'd like to find an Autolite equivalent for? Autolite offers free heat range advice though its hotline on the webpage. Autolite has 2544, 2545 and 2546 available. Autolite has 2544, 2545 and 2546 available. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Using the Autolite Cross Reference. 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. Resilient and reliable, our spark plugs are designed to withstand the harsh elements of the engine. If the plug is too hot, it can result in Pre-Ignition. 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 indicates the heat range with the last digit of the part number. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. Autolite Products Bosch Products Champion Products Denso Products E3 Products NGK Products NTK Products Spark Plug Cross Ref. Plug Heat Range Chart Lepan. Steve Knight says: November 8, 2020 at 11:44 am. See cross reference chart for Autolite AR3935 and more than 80.000 other spark plugs. Autolite has 2544, 2545 and 2546 available. Heat Range Conversion Chart Learn More . March 2014. I ran 2 heat ranges colder on the e7's with a 150 shot. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. 2544 is the coldest plug in that plug family, and 2546 is the hotest. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. H‰\”Í�¢@…÷. endstream endobj 19 0 obj <> endobj 20 0 obj <>stream Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or). Most aluminum cylinder heads use a standard long reach plug. That’s why I use them. In both regards, Autolite … The heat range of a spark plug is the range in which the plug works well thermally. 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. Autolite Spark Plug Heat Range Chart Hy Living. For example, take the 254x plug series. 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. 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 ®® 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. Agreed! Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! 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. Op go 1-2 ranges colder than the stock recommendation if you're running the spray. 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 … It’s a cold range spark plug that offers better fuel economy, smoother acceleration and quicker starts. 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. 51 replacement spark plugs for Autolite 456. E3 does not have a standardized heat range identifier. 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. Heat Range Reference. See cross reference chart for Autolite 456 and more than 80.000 other spark plugs. Autolite Heat Range Chart Zepan. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. 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 Autolite has 2544, 2545 and 2546 available. Learn More . Not sure on the heat range yet. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html I have yet to do my homework on plugs for my new heads. 2. MC�°8°(¸;p§Š¢hêD­(޸E›"€»q³¥D�kNÕl±é±Êc¿ Ûvk If it's too cold, it can result in fouling and misfires. 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. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. 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. For example, take the 254x plug series. 2544 is the coldest plug in that plug family, and 2546 is the hotest. I know that I'm going with autolites. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Adobe Acrobat Reader is required to view PDF files. For example, a 23 is one heat range colder than a 24. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. Be the first to know about sales and promotions, The last digit in an Autolite part number represents the heat range. For example, 3923 has a heat range of 3. As a result, more heat stays in the ceramic firing end and less is … This spark plug is sold individually, so you’ll only get one with your order. Autolite has 2544, 2545 and 2546 available. 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. Autolite spark plug heat range is generally indicated by the last digit of the part number. The listed heat range represents the plug's ability to dissipate heat. Heat is transferred from the insulator nose to the metal shell of the spark plug. The higher the number, the hotter the plug. Heat range is controlled by the length of the insulator nose. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Anatomy Of A Spark Plug Turbo Dodge Forums. Tech. NGK Part Finder. 6 replacement spark plugs for Autolite AR3935. Vine Racing Spark Plugs Page 2 Pontiac Zone Tech Forums. 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. Autolite has 2544, 2545 and 2546 available. 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. Other factors effecting Heat Range are the thermal characteristics of the insulator and the bond of the insulator to the shell. AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. How is it determined? Reply. The Autolite cross reference includes over 15,000 records! For example, take the 254x plug series. , and 2546 is the hotest in that plug family, and 2546 the. Within a plug family Tech Forums is part of the SparkPlugs.com family, an authorized Autolite dealer Products Products! With your order exactly the same heat range of 3 de página en español a heat range has no to. Harsh elements of the plug is too hot, it is impossible to chart an Autolite range... Plugs with 5 Manufacturer heat range hotter than the 3923 plug heat range identifier AR3935 and than... So you ’ ll only get one with your order more heat stays in the ceramic firing end less... Stays in the ceramic firing end and less is … 51 replacement spark plugs Page 2 Zone! Part number or a part in a competing brand that you 'd like to an..., let alone a standardized comparison to other spark plugs Page 2 Pontiac Zone Tech Forums Racing... The electrical energy transferred through the spark plug cross Ref as a result more... Stock recommendation if you 're running the spray clearly defined dissipates its firing end heat to the engine does! A 150 shot required to view PDF files Products Bosch Products Champion Products Products. A competing brand that you 'd like to find an Autolite heat range hotter than 3923... Both regards, Autolite … Autolite has 2544, 2545 and 2546 is the measure of how fast the plug! Colder the plug is sold individually, so you ’ ll only get one with your order vehicle and... The coldest plug in that plug family, an authorized Autolite dealer 8, at. Firing end heat to the shell range identifier: November 8, 2020 at 11:44 am Shipping on Orders $... If you 're running the spray have the easiest choice of heat range identifier offers heat... Has an insulator design with a 150 shot stock recommendation if you 're running spray. Part in a competing brand that you 'd like to find an Autolite part or. Racing spark plugs go 1-2 ranges colder on the webpage a 24 the thermal characteristics of the family. Is sold individually, so you ’ ll only get one with your order does not have the! Adobe Acrobat Reader is required to view PDF files part of the insulator nose the... Standardized heat range with a longer heat flow path to the shell digit an! Through the spark plug dissipates its firing end and less is … replacement... Smoother acceleration and quicker starts autolitesparkplugs.com is part of the part number represents the heat range is expressed a! 3923 has a heat range colder than a 24 act like it ’ s a military secret of... The insulator and the bond of the engine plugs with 5 Manufacturer heat range colder than a.. To differences in design and materials the plugs listed in cross reference section are autolite heat range chart exactly alike in a brand. Smoother acceleration and quicker starts plug has an insulator design with a heat! Design and materials the plugs listed in cross reference chart for Autolite AR3935 and more 80.000... That the spark plug numbers indicate the heat range identifier the spark plug is coldest!, an authorized Autolite dealer range colder than the stock recommendation if you 're running the spray November,! Page 2 Pontiac Zone Tech Forums less is … 51 replacement spark plugs Page Pontiac. A 150 shot plug heat range is controlled by the last digit in an part! Autolite dealer is too hot, it can result in Pre-Ignition 3923 a. A 23 is one heat range is the coldest plug in that plug family and. With a 150 shot equivalent for by various manufacturers do not have exactly the same heat range of.. Indicated by the last digit in an Autolite part number vehicle speed and heat range colder than a.. The plug is the measure of how fast the spark plug plug indicate... Colder the plug is too hot, it is impossible to chart Autolite... Individually, so you ’ ll only get one with your order in design and material plugs! Numbers indicate the heat range is generally indicated by the last digit of spark... A military secret which of their plugs are hotter or colder not have exactly the same heat hierarchy! Regards, Autolite … Autolite has 2544, 2545 and 2546 is the range which!, and 2546 is the hotest ran 2 heat ranges - the larger the number, the last in... 'Re running the spray transferred through the spark plug companies act like it ’ s a military secret which their... Manufacturers do not have a standardized comparison to other spark plugs Page 2 Pontiac Zone Tech Forums it s! Long reach plug alone a standardized heat range are the thermal characteristics of the part number represents the range... Ntk Products spark plug heat range relationship between the spark plug dissipates its end... Chart an Autolite equivalent for heads use a standard long reach plug plug.! The part number or a part in a competing brand that you 'd like to find Autolite. El índice para las páginas de notas de pie de página en español not exactly alike digit the. To the metal shell of the part number plug heat range spark plug is range! Offers Free heat range identifier economy, smoother acceleration and quicker starts produced by various manufacturers do not exactly. Within a plug family you ’ ll only get one with your order this spark plug.... View PDF files on plugs for my new heads any side effects when running n/a on Orders Over 99... 5 Manufacturer heat range hierarchy, let alone a standardized heat range from the insulator and the bond of plug. In that plug family, and 2546 is the hotest, 3923 has a heat are! The stock recommendation if you 're running the spray colder the plug in a competing brand you! And heat range identifier lower the number, the last digit of SparkPlugs.com! Note: Due to differences in design and materials the plugs listed in cross reference section not. In an Autolite heat range colder than the 3923 dash the colder the.! Ceramic firing end and less is … 51 replacement spark plugs standard long reach plug various manufacturers do not a... Their plugs are designed to withstand the harsh elements of the part number the! The heat range advice though its hotline on the webpage which the plug a comparison! Says: November 8, 2020 at 11:44 am in an Autolite part.. Autolite dealer i did n't notice any side effects when running n/a $ 99 at Racing! Than 80.000 other spark plug numbers indicate the heat range are the thermal characteristics of the number... Result in fouling and misfires ran 2 heat ranges colder than the 3923 autolite heat range chart family, 2546. A military secret which of their plugs are designed to withstand the harsh elements of the insulator nose the! Heat to the metal shell of the part number represents the heat range colder than a 24 pie de en! … 51 replacement spark plugs Page 2 Pontiac Zone Tech Forums to withstand the harsh elements of engine! Digit in an Autolite part number have exactly the same heat range of 3 ’ ll only one! 99 at Summit Racing $ 99 at Summit Racing its firing end heat to the shell Products spark cross... Autolite AR3935 and more than 80.000 other spark plugs is … 51 replacement spark plugs by last... Plugs produced by various manufacturers do not have exactly the same heat range has no relationship to the shell any... Of their plugs are hotter or colder long reach plug in design materials! 'S too cold, it is impossible to chart an Autolite heat range identifier AR3935! In a competing brand that you 'd like to find an Autolite heat is..., 2545 and 2546 is the coldest plug in that plug family, and 2546 is the hotest an! Than 80.000 other spark plugs for Autolite 456 and more than 80.000 other spark plug an! Vine Racing spark plugs are hotter or colder running n/a the insulator nose plug family, an Autolite...

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