Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. • 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 March 2014. NGK is the world’s largest OE supplier and manufacturer of spark plugs. Cloudflare Ray ID: 609665c5499e3573 Heat range is controlled by the length of the insulator nose. Example a R5671A-7 (a good street/strip plug) is a cold plug where a R5671A-10 is a very cold plug used for large 400hp and up nitrous and other power adder applications) Autolite Heat Ranges - The larger the last digit in the part number, the hotter the plug is. So 4 is a notch or two colder than stock. 5 NGK 7164 TR55IX Projected Stock Heat Range. Your IP: 103.58.102.37 A colder heat range spark plug has an insulator design with a shorter heat flow path to the metal shell of the plug. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. NGK Heat Ranges - The larger the number after the dash the colder the plug is. 23 would be colder if it's a good 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. Autolite has 2544, 2545 and 2546 available. Summit Racing Gift Cards - Always the Perfect Gift! 2544 is the coldest plug in that plug family, and 2546 is the hotest. One thing i was told about NGK plugs vs Champions, is that Champions crossover is not an accurate heat ranged plug, and in 2 stroke application this can cause issues. Extended Gap. Inside … A "stock heat range" plug would be a 5 or 6 (higher is hotter). Not intimately familiar with the Accell numbering scheme, but you should probably be able to figure out which one would be close in terms of heat range, given that info. Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. 2544 is the coldest plug in that plug family, and 2546 is the hotest. For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. 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 Ngk goes the other way and the lower the number the hotter the plug. 5 (NGK) Denso 5325 IT-16 Projected Sotck 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. If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. Shop Now . Autolite has 2544, 2545 and 2546 available. Find Autolite Spark Plugs 4 Manufacturer Heat Range, 14mm Spark Plug Thread Size and get Free Shipping on Orders Over $99 at Summit Racing! For NGK, Denso and Pulstar, the higher the number, the colder the plug. Whether the theory appliess to Autolite vs NGK i dunno. Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63. an autolite 24 is colder than a 26. Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! Selecting the Right Heat Range. Heat range is the speed at which a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Autolite indicates the heat range with the last digit of the part number. Autolite engineers have developed plugs in many heat ranges to suit all engine applications. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Typically the heat range for NGK Spark Plugs varies from 2-11. Autolite's numbering system does not have a standardized heat range identifier. The lower the number, the colder the plug. Some manufacturers numbering systems are opposite the other - for Champion, Autolite and Bosch, the higher the number, the hotter the plug. So for a normal, street-driven engine, that 3924 … 2544 is the coldest plug in that plug family, and 2546 is the hotest. heat range for autolites, acdelcos, champions, and other American plugs get colder as the number goes down. Inside the United States 1-800-230-3030 1-800-230-3030. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. HEAT RANGE CHART Page 3 of 3 NON- PROJECTED TRUCK PLUG PLUGEZ START STAINLESS TRUCK STEEL 14mm .325" Reach 5/8" Hex Tapered Seat HOT COLD 5847 5851 14mm 5846 3/8" Reach 3/4" HOT COLD 5843 14mm 3/8" Reach 13/16" NORM 5861 14mm .460" Reach 5/8" Hex 5942 Tapered Seat HOT COLD 4113 4019 14mm 1/2" Reach 13/16" **Surface Gap HOT COLD 593 3 593 1 588 3 582 8 … NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. Autolite has 2544, 2545 and 2546 available. Autolite AR133 2 Heat Ranges Colder NGK Forced Induction NGK-Non Projected Electrode Specifications: Thread Size= 14mm Hex Size= .625 Reach= .75 Seat Type= Electrode= V-Power R5673-8 Stock Number 3249 R5673–9 Stock Number 3442 for tons of boost and power. Supplier and manufacturer of spark plugs this number indicates the thermal characteristics of a spark plug or! 3923 has a heat range with the last digit in an Autolite range... 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