For Champion, higher numbers are hotter. These are displayed as a 2 or 3 digit number after the hyphen. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. Iridium “S” offers exceptional performance, even … 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: Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. 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. Longer lasting than platinum spark plugs, Iridium “S” plugs resist lead attack and provide better scavenging than standard platinum plug designs. 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. If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. 2544 is the coldest plug in that plug family, and 2546 is the hotest. The world leader in spark plug technology for over 80 years. • HOT PLUG Why is Heat Range Critical? 2544 is the coldest plug in that plug family, and 2546 is the hotest. 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: A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). These charts contain a detailed example of the Champion Sales Symbol. iridium upgrade stock no. Notes. The following chart has been extracted from a 1957 Champion Sparkplug chart for veteran, vintage and classic sparkplugs. Don't just ask for a spark plug, insist on NGK. 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 Heat Ranges - The larger the last digit in the part number, the hotter the plug is. 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. You will need to know your harness B-nut size. It must do this in a controlled manner that will: 1. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html Choose your next Champion from the range … Spark Plug Heat Range Cross Reference . 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. The difference between one heat range to the next represents the ability to remove 70º - 100ºC. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. 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. 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. Racing Heat Range and Tuning Guide. We offer the latest technology in spark plug design & performance that can help you improve your engine performance & fuel economy. Ferodoracing is a leading manufacturer in high performance automotive products including braking systems, clutches, spark plugs and brake pads. Spark Plug Heat Range. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. A COLDER or 'harder' spark plug is more suited to a hotter running engine (i.e. Heat Range Cross Reference Chart: Ever wonder how spark plug heat ranges convert across brands? … I used to use D-16's but found them to be less than desirable. platinum upgrade stock no. I tried the NGK's but didn't like them either. Doesn't matter if it is -30C or 20C .. Ellie pretty much starts without spark issues. Spark plugs are heated by the burning fuel in the motor, and coated with the fuel's combustion products: soot, oil, etc. Heat Range Cross Reference Table | … Call us at 713-459-6977. Most spark plug manufacturers recommend that the tip temperature remain between 500° C … A: Tempest currently manufactures only 18mm spark plugs. If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. Example a AR3935 (good street/strip plug) is hotter than a AR3932 plug which is very cold used for lots of nitrous. Unfortunately they differ between brands as to whether a higher number is hotter or colder. With Champion spark plugs, a higher number in the middle of the part designation designates a hotter spark plug. Champion spark plugs stand up to high temperatures, pressures, and deposits. Choose a brand from the list below then locate the spark plug for your specific saw by model 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. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. Champion Heat Ranges - Typically Champion numbers in the same series the larger the number the hotter the plug. In these instances, a colder plug may be needed. Champion D-21's are the only plug I use. As a result, more heat stays in the ceramic firing end and less is … You never forget your first Champion ®. The optimal temperature to remove carbon deposits from the tip of the spark plug is 450º - 500ºC. 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. Q: What spark plug should I use for my engine? Most spark plug manufacturers indicate a spark plug's heat range within the part number; Bosch, Denso and NGK also place the heat range … When those conditions change beyond certain limts, the spark plug's heat range should change as well. 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