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. 2544 is the coldest plug in that plug family, and 2546 is the hotest. From the high-tech Ruthenium HX™ to the industry standard OE-style spark plugs, NGK drives the future of spark plug engineering. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. ngk spark plug upgrade chart original plug stock no. Heat Range 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. As a result, more heat stays in the ceramic firing end and less is … 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. Find NGK Spark Plugs Spark Plugs 7 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! LTD. All Rights Reserved |, Conditions when Spark Plug should be Changed. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. The world leader in spark plug technology for over 80 years. They don’t provide any more voltage to the spark plug tip! 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 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. 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. The part number you have entered is unknown or incorrect. Typically the heat range for NGK Spark Plugs varies from 2-11. It is important to remember that spark plugs do not create heat, they can only remove heat. Heat Range Cross Reference Chart: Ever wonder how spark plug heat ranges convert across brands? 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. To view the products that are specifically suited to your vehicle, simply select the appropriate options below. NGK Heat Ranges - The larger the number after the … 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. Racing Spark Plugs ; Typically the heat range for NGK Spark Plugs varies from 2-11. The heat range numbering system used by spark plug manufacturers is not universal. 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. 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. 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. Spark Plug Heat Range Cross Reference . 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. 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. 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. Heat range is the measure of how fast the spark plug tip dissipates combustion heat. 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. platinum upgrade stock no. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. 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. 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. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. Heat Ranges When it comes to racing, choosing a spark plug within the correct heat range is vital. And remember : A higher heat-range number does not improve engine performance, it increases the plug's ability to dissipate heat. Selecting the Right Heat Range. Spark plugs may physically appear to be the same but have a different heat range based on the insulator design or shape. However, sparks don’t just simply ignite. 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. 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). 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. 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. View full size version of NGK spark plug numbering chart. 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. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). Product linkage to vehicles or equipment from this publication are considered under normal conditions of use, fitted by a professional. 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. Example: R5671A-10 has a heat range of 10. These are displayed as a 2 or 3 digit number after the hyphen. 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. Spark Plug, Racing, Tapered Seat, 14mm Thread, 25mm Reach, Heat Range 8, With Resistor, Each. 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. To contact them, click here. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. In reality, most “racing” spark plugs are just colder heat ranges of the street versions of the spark plug. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Please refer to our application listings for full details. NGK Spark Plugs (U.S.A.), Inc. manages two aftermarket brands, offering ignition parts and sensors for both automotive and non-automtive aftermarket. Part Number: NGK-93400 Not Yet Reviewed Conversely, a high heat range (or cold) spark plug has a short thick insulator nose which will dissipate heat much easier (above right). 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 … A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. This means the spark plug will heat up easily and reach its optimal operating temperature. 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. Don't just ask for a spark plug, insist on NGK. Call us at 713-459-6977. For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. It is essential to use a spark plug that fits a specific engine and its conditions of use. View full size version of NGK performance plug numbering chart. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. 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. 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 … For example, R6120-85 has a 8.5 heat range and R6120-105 has a 10.5 heat range. The heat range is defined as a plug’s ability to dissipate heat. 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. Autolite engineers have developed plugs in many heat ranges to suit all engine applications. NGK Spark Plug Heat Rating. 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. Racing Spark Plugs. This publication are considered under normal conditions of use, fitted by a professional that in the.. Cold through MEDIUM ; and hot to extremely hot your vehicle, simply select appropriate! Measure of how fast the spark plug brands plugs ( U.S.A. ), Inc. manages two aftermarket brands offering! How ‘ hot ’ or ‘ cold ’ a spark plug firing end heat to the standard... Transferred through the spark plug is specification is subject to change without notice performance plug numbering chart just heat. R6120-85 has a 10.5 heat range is vital transferred through the spark specification... Alone a standardized comparison to other spark plug tip to be the same but have a different range! 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