Spark Plug, Racing, Tapered Seat, 14mm Thread, 25mm Reach, Heat Range 8, With Resistor, Each. Racing Spark Plugs ; Typically the heat range for NGK Spark Plugs varies from 2-11. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. These factors include spark plug seat design, thread length and diameter, and reach. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or whether it provides resistance to heating up (cold). Selecting the Right Heat Range. High performance engines on the other hand produce a large amount of heat, hence a high heat range (or cold) spark plug such as a 10 heat range needs to be used to resist the heat developed by the engine. It must do this in precise and controlled manner so the spark plug will: Stay cool enough to avoid pre-ignition and/or electrode destruction due to detonation. Example: R5671A-10 has a heat range of 10. LTD. All Rights Reserved |, Conditions when Spark Plug should be Changed. Heat Range Cross Reference Table | … 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. EXCEPTION: NGK Racing Plugs: (Any NGK plug that begins with the letter “R”) For NGK Racing Plugs, the heat range is located AFTER the hyphen. Autolite engineers have developed plugs in many heat ranges to suit all engine applications. Depending on the engine modifications you’ve made, you’ll need to take a few extra factors into consideration before settling on the right spark plugs. 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. These NGK spark plug charts explain how NGK's numbering system works. The heat range numbering system used by spark plug manufacturers is not universal. To view the products that are specifically suited to your vehicle, simply select the appropriate options below. Spark Plug specification is subject to change without notice. We offer the latest technology in spark plug design & performance that can help you improve your engine performance & fuel economy. It must do this in a precise and controlled manner so the spark plug will: Stay cool enough to avoid pre-ignition and/or electrode destruction due to detonation. 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. In reality, most “racing” spark plugs are just colder heat ranges of the street versions of the spark plug. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. Typically the heat range for NGK Spark Plugs varies from 2-11. A low heat range (or hot) spark plug typically has a long thin insulator nose which will heat up easily however will not dissipate readily to the metal shell (above left). Heat Ranges When it comes to racing, choosing a spark plug within the correct heat range is vital. Don't just ask for a spark plug, insist on NGK. NGK Spark Plugs (U.S.A.), Inc. manages two aftermarket brands, offering ignition parts and sensors for both automotive and non-automtive aftermarket. NGK Spark Plug Heat Rating. Heat range - It's important to choose a racing plug with a heat range that keeps the electrode at an optimum temperature under even the most torturous racing conditions. The spark plug firing end temperature must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. The heat rating is a measure of the amount of heat dissipation.The heat range of a spark plug is the range in which the plug works well thermally. Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. View full size version of NGK performance plug numbering chart. For example, R6120-85 has a 8.5 heat range and R6120-105 has a 10.5 heat range. Their internal construction is no different (in NGK’s case, as all of our spark plugs must conform to the same level of quality controls) than most standard spark plugs. However, sparks don’t just simply ignite. 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. Sector – 15, 32nd Milestone, National Highway 8 Gurugram – 122001 (Haryana), INDIA, 2020 © NGK SPARK PLUGS (INDIA) PVT. 2544 is the coldest plug in that plug family, and 2546 is the hotest. One of the most important—and most misunderstood—factors in choosing aftermarket spark plugs is the heat range. Generally, low power engines such as lawn mowers don’t produce a large amount of heat, hence use a low heat range (or hot) spark plug such as a 4 heat range. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. Example: R5671A-10 has a heat range of 10. 2544 is the coldest plug in that plug family, and 2546 is the hotest. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. Spark Plug Heat Range Cross Reference . Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. COLD MEDIUM HOT Racing Plug Number Old Racing Plug Number Champion NGK An IATF 16949:2016 & ISO 9001:2015 Certified, An ISO 14001:2015 & ISO 45001:2018 certified Co. While every precaution has been taken in the compilation of this information, NGK Spark Plug (Australia) Pty Ltd takes no responsibility for inaccuracies that may occur within it. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. The part number you have entered is unknown or incorrect. This means the spark plug will heat up easily and reach its optimal operating temperature. 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. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. It takes a high amount of precision to create spark plugs that perform their task well and are extremely resistant in doing so. NGK.com specializes in hard to find NGK products. Part Number: NGK-93400 Not Yet Reviewed platinum upgrade stock no. It is essential to use a spark plug that fits a specific engine and its conditions of use. Racing Heat Range and Tuning Guide. Please refer to our application listings for full details. Several factors influence the heat range of a spark plug, although typically the insulator nose design provides an indication of the heat range of a 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. They don’t provide any more voltage to the spark plug tip! The world leader in spark plug technology for over 80 years. And remember : A higher heat-range number does not improve engine performance, it increases the plug's ability to dissipate heat. Rules for selecting the correct plug are to follow manufacturer’s specifications. 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. For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. Conversely, a high heat range (or cold) spark plug has a short thick insulator nose which will dissipate heat much easier (above right). In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. iridium upgrade stock no. Heat Range Reference. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. The spark plug temperature remains too low and causes deposits to build up on the firing end; the deposits offer an electrical leakage path that gives rise to loss of sparks. When a spark plug absorbs heat produced from combustion, the heat is transferred through the centre electrode and insulator nose to the metal shell, which then transfers the heat into the engine casing and circulating coolant. Heat range is the measure of how fast the spark plug tip dissipates combustion heat. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber. b6hs 4510 - - br6hix 3419 b7es 1111 - - br7eix 6664 b7hs 5110 - - br7hix 7067 b8es 2411 b8evx (disc'd) 7051 br8eix 5044 b8evx (disc'd) 7051 n/a - br8eix … Product linkage to vehicles or equipment from this publication are considered under normal conditions of use, fitted by a professional. 2544 is the coldest plug in that plug family, and 2546 is the hotest. It is important to remember that spark plugs do not create heat, they can only remove heat. This is called “thermal performance,” and is determined by the heat range selected. The heat rating is a measure of the amount of heat dissipation.The heat range of a spark plug is the range in which the plug works well thermally. NGK spark plugs push the limits of performance and innovation, bringing the most advanced technology to today’s high-efficiency engines. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. As a result, more heat stays in the ceramic firing end and less is … The spark plug temperature rises too high and induces abnormal combustion (pre-ignition): this leads to melting of the spark plug electrodes as well as piston seizure and erosion. 502, Fifth Floor, JMD Pacific Square, This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Note: This cross-reference is a guide only and may not be suitable for all vehicles. Heat Range Cross Reference Chart: Ever wonder how spark plug heat ranges convert across brands? These are displayed as a 2 or 3 digit number after the hyphen. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). NGK Spark Plugs has been igniting sparks since the 1930s. Racing Spark Plugs. The heat range is defined as a plug’s ability to dissipate heat. The spark plug temperature remains too low and causes deposits to build up on the firing end; the deposits provide an electrical leakage path that gives rise to a reduction of spark. For usage in applications outside of normal use or not listed in this publication, NGK Spark Plug (Australia) Pty Ltd takes no responsibility. 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. NGK Heat Ranges - The larger the number after the … We are not NGK Spark Plugs USA. All applications, illustrations and technical information detailed on this site have been assembled based on the latest information available. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. NGK Spark Plugs pioneered the use of a copper cored electrode in 1958, which enables a spark plug to heat up quickly and also dissipate heat quickly giving an ultra wide heat range. Racing Spark Plugs ; Typically the heat range for NGK Spark Plugs varies from 2-11. Introduction. Call us at 713-459-6977. To contact them, click here. All NGK Glow Plugs are manufactured to the highest level of quality to ensure quick and consistent starts NGK Resistor Caps The cover body is made of sturdy phenolic resin that endures high heat … Some NGK Racing Plugs are also available in half heat ranges. Find NGK Spark Plugs Spark Plugs 7 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). Spark plugs may physically appear to be the same but have a different heat range based on the insulator design or shape. From the high-tech Ruthenium HX™ to the industry standard OE-style spark plugs, NGK drives the future of spark plug engineering. NGK Spark Plug Numbering Systems Wondering what the numbers and letters on an NGK spark plug mean? 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. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. The spark plug works as a heat exchanger by pulling unwanted thermal energy away from the combustion chamber, and transferring the heat to the engine’s cooling system. ngk spark plug upgrade chart original plug stock no. View full size version of NGK spark plug numbering chart. Selecting an incorrect heat range for your application may cause fouling of the spark plug if too cold, or possibly severe catastrophic engine failure if too hot for the application. The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this leads to melting of the spark plug electrode that could cause problems such as piston seizure. “ heat range is the measure of how fast the spark plug has insulator. Design or shape and its conditions of use, fitted by a.! Been assembled based on the insulator design with a longer heat flow path to the energy. Standardized comparison to other spark plug specification is subject to change without notice temperature and vehicle and!: R5671A-10 has a 10.5 heat range and R6120-105 has a 10.5 heat range is vital “ thermal,. Range and R6120-105 has a 8.5 heat range of ngk racing spark plugs heat range chart, illustrations and technical detailed. 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