A = Thread Diameter = 14 mm G = Reach = .708" Conical Seat S = Plug Characteristic = Suppressor (Carbon) F = Plug Characteristic = Conical Seat 3 = Heat Range = Cold (Stock) 2 = Tip Configuration = Extended (Power) Tip C = Plug Characteristic = Copper Core Electrode If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. Thread size: Heat range: NGK Standard type: NGK Projected Type : Champion Y-projected type G-gold palladium electrode: AC S-projected type: Denso (DS) Bosch: KLG P-projected type: Auto-Lite: The plug type on a spark plug is composed of a basic “Heat Range’’ number with letters and numbers to indicate major features of the plug design. Choose your next Champion from the range … iridium upgrade stock no. Don't just ask for a spark plug, insist on NGK. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. These are displayed as a 2 or 3 digit number after the hyphen. 2544 is the coldest plug in that plug family, and 2546 is the hotest. With modern sophisticated engines, new ceramics and superior alloys for spark plugs, the job of selecting a plug for a specific engine has become more critical. Heat Range Cross Reference Chart: Ever wonder how spark plug heat ranges convert across brands? Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Most spark plug manufacturers recommend that the tip temperature remain between 500-850 degrees Celsius. Unfortunately they differ between brands as to whether a higher number is hotter or colder. The only difference between plug RCJ6Y and RCJ8Y lies in their heat ranges. Most spark plug manufacturers recommend that the tip temperature remain between 500° C … I tried the NGK's but didn't like them either. If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. Some NGK Racing Plugs are also available in half heat ranges. FIRING END DESIGN HEAT RANGE / APPLICATION SUPPRESSOR / SHIELDING SHELL DESIGN F B 77 W P C C FB77WPCC Letter Description Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. “Heat range” is a rough guide to how hot the plug will remain under the anticipated motor conditions. Heat Range: Cold (59) Champion Spark Plug Guide (GIF) Champion Heat Range Guide (GIF) Champion Conversion Chart (GIF) Spark Plug Gapping Instructions (GIF) Autolite, Champion, NGK Cross Reference Chart (PDF) Item Details.750" Reach, 5/8" Hex Notes. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Example: R5671A-10 has a heat range of 10. If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. Champion makes a wide range of spark plugs, including the RCJ6Y and the RCJ8Y types. Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. A: Tempest currently manufactures only 18mm spark plugs. Introduction. March 2014. If you need the NGK Spark Plug list, click here. Racing Heat Range and Tuning Guide. As a result, more heat stays in the ceramic firing end and less is … With Champion spark plugs, a higher number in the middle of the part designation designates a hotter spark plug. Choose a brand from the list below then locate the spark plug for your specific saw by model number. ... while the number is the heat range. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). A COLDER or 'harder' spark plug is more suited to a hotter running engine (i.e. Iridium “S” offers exceptional performance, even … While the motor company only recommends use of their original equipment Harley brand spark plugs, the other brands often exceed original specification and will not void your warranty. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. In these instances, a colder plug may be needed. NGK Denso Champion Heat Range Equivalents A Spark Plug's heat range is a measure of it's ability to conduct heat away from its firing end. The optimal temperature to remove carbon deposits from the tip of the spark plug is 450º - 500ºC. Ferodoracing is a leading manufacturer in high performance automotive products including braking systems, clutches, spark plugs and brake pads. Spark plugs are heated by the burning fuel in the motor, and coated with the fuel's combustion products: soot, oil, etc. Knowing which plug to use in a particular engine can be difficult, as the plugs are very similar. Champion D-21's are the only plug I use. Spark plug comparison chart . NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. The D-21's have provided good service for almost 11 years for me so I will stay with them. Example a AR3935 (good street/strip plug) is hotter than a AR3932 plug which is very cold used for lots of nitrous. The difference between one heat range to the next represents the ability to remove 70º - 100ºC. 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. Notes. Champion Heat Ranges - Typically Champion numbers in the same series the larger the number the hotter the plug. For example, R6120-85 has a 8.5 heat range and R6120-105 has a 10.5 heat range. These charts contain a detailed example of the Champion Sales Symbol. Spark Plug Cross Ref. Spark Plug Heat Range Cross Reference . Spark Plug Heat Range. • HOT PLUG Why is Heat Range Critical? 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. I used to use D-16's but found them to be less than desirable. 2. The Champion chart I have lists the following plugs, in order from hottest to coolest : RN16YC5 RN14YC R/N12YC R/N11YC 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 Longer lasting than platinum spark plugs, Iridium “S” plugs resist lead attack and provide better scavenging than standard platinum plug designs. It can be a pain when you need a new spark plug but you don't know how your current heat range translate to a new brand. It is the measure of how fast the spark plug tip dissipates combustion heat. … Follow this link for more information on Determining Correct Spark Plug Heat Range. Q: What size spark plug does Tempest® manufacture? ngk spark plug upgrade chart original plug stock no. We offer the latest technology in spark plug design & performance that can help you improve your engine performance & fuel economy. Most spark plug manufacturers indicate a spark plug's heat range within the part number; Bosch, Denso and NGK also place the heat range … Call us at 713-459-6977. platinum upgrade stock no. A: Please refer to the Tempest application chart.There are several things you will need to know as most engines have several different spark plugs approved. Harley Spark Plug Cross-Reference Below is a cross-reference list of spark plugs for use in most Harley models. NGK Spark Plugs Denso Spark Plugs Champion Spark Plugs Bosch Spark Plugs and E3 Spark Plugs for automotive, motorcycle, marine, truck and lawn and garden applications. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html ... Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. You never forget your first Champion ®. Heat Range Cross Reference Table | … For Champion, higher numbers are hotter. The following chart has been extracted from a 1957 Champion Sparkplug chart for veteran, vintage and classic sparkplugs. When dealing with Bosch spark plugs, the heat range is again designated by the number in the middle of the part code; a “W8DC” has a heat range of 8 and a “W6DC” a heat range of 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. Spark Plugs . Autolite Heat Ranges - The larger the last digit in the part number, the hotter the plug is. According to Champion Spark Plugs, for normally aspirated, gasoline-fueled engines, a good rule of thumb is to go about one heat range colder for each … Q: What spark plug should I use for my engine? Doesn't matter if it is -30C or 20C .. Ellie pretty much starts without spark issues. The world leader in spark plug technology for over 80 years. When those conditions change beyond certain limts, the spark plug's heat range should change as well. You will need to know your harness B-nut size. Our spark plugs have been improving engine performance since 1907. If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. pgr7a 3200 n/a - igr7a 6687 plfr6a-11 7654 n/a - ilfr6t11 4904 pltr6a-10g 3587 n/a - iltr6a-13g * 3789 plzfr6a-11s 5987 n/a - ilzfr6d11 1208 plzkbr7a-g (disc'd) 5843 n/a - ilzkbr7b8dg 95770 Refer to the downloadable Sparkplug Chart for a list of plug recommendations or purchase Sparkplugs Volume 2.: To download or view a detailed chart of recommended sparkplugs for cars from 1900-1960 click on Plugchart below: Champion spark plugs stand up to high temperatures, pressures, and deposits. Chainsaw & Cut-Off Saw Spark Plug Application Chart Use this Chainsaw Spark Plug Reference Chart to find the right spark plug for your gas powered chainsaw or cut-off saw. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. It must do this in a controlled manner that will: 1. Combustion heat range of 10 R6120-85 has a 8.5 heat range cross reference:... 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