spark plug heat range explained

The Data User shall refrain from copying and disseminating the data or the database as a whole and / or from causing such acts to be carried out by third parties, without TecDoc's prior consent. No matter what type of spark plug you choose, an optimal heat rating for your vehicle’s engine is important. For example, a 14 heat range in Denso is not the same as a 14 heat range … A switch in heat range of the spark plug will change the tem-perature of the spark plug tip by 70-120 degrees. This web site uses cookies. 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. 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. For normal use, the selection of a spark plug heat range is a balance between keeping the tip hot enough at idle to prevent fouling and cold enough at maximal power to prevent pre-ignition or engine knocking. This means the spark plug will heat up easily and reach its optimal operating temperature. A colder heat range spark plug has an insulator design with a shorter heat flow path to the … Ever wonder how spark plug heat ranges convert across brands? Not a problem, just give us a call on 01209 202 949 or use our custom recommendation form and we'll be happy to look into the best possible choice for you. 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. Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. Opie Oils has a simple lookup that can find the correct spark plugs for your vehicle in seconds. Total: £0.00, BMW | 2544 is the coldest plug in that plug family, and 2546 is the hotest. Spark plugs heat ranges can vary massively from plug to plug, and (rather frustratingly) can be recorded in a number of different ways, making comparison between brands rather hard. A spark plug’s heat range has no relationship to the actual voltage transferred through the spark plug. Low powered engines don't normally produce as much combustion warmth so won't heat up a plug as much or as rapidly as a high BHP vehicle, therefore the plugs have to be designed accordingly so they can reach and not exceed optimum operating temperatures. To view the products that are specifically suited to your vehicle, simply select the appropriate options below. The spark plug heat range only indicates the rate that the spark plug dissipates its firing end heat to the engine. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. The term heat range refers to the speed with which a plug can transfer heat from the combustion chamber to the engine head. Typically the heat range for NGK Spark Plugs varies from 2-11. Run hot enough to burn off combustion Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. For example, a 7 heat range in Bosch is not the same as a 7 heat range in NGK nor the same in Champion. But even a spark plug featuring a properly selected heat range, is influenced by the processes of fouling and self-cleaning of the insulator tip. 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. 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. 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. 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. 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. Spark Plug specification is subject to change without notice. Rather, the heat range is a measure of the spark plug’s ability to remove heat from the combustion chamber. The heat range numbering system used by spark plug manufacturers is not universal. [more]. Conversely, a high heat range (or cold) spark plug has a short thick insulator nose which will dissipate heat much easier (above right). It is essential to use a spark plug that fits a specific engine and its conditions of use. Any violation shall constitute a copyright infringement and shall be subject to prosecution. 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. The choice of a proper heat range is very important. If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. Renault | The heat range numbering system used by spark plug manufacturers is not universal. 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. Rather, the heat range is a measure of the spark plug’s ability to remove heat from the combustion chamber. If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. 2544 is the coldest plug in that plug family, and 2546 is the hotest. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs). 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. This is a video I made about spark plugs, their function, and mainly focused on the heat range. 0 Items VW, Diesel System Additives & Cetane Boosters, Motorsport Fuel Octane Boosters / Fuel Treatments, High Viscosity Index + Detergency (HVI+D), Zinc & Ash Free, High Viscosity Index (ZAF & HVI), Screen Washer Pumps, Wiper Motors, Jets & Reservoirs, Camping Equipment Waterproofing & Protection, Using a spark plug with the correct heat range is critical for engine compatibility. Until you've updated you may not be able to check out. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. He also added that the Triumph 6 cylinder engine uses a 14mm with .750 reach. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … 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. In broad terms, spark plugs are often referred to as “hot plugs” or “cold plugs.” 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. Setting a Proper Gap. Racing Heat Range and Tuning Guide. Please refer to our application listings for full details. TecAlliance (who provide their TecDoc vehicle list and TecDoc data for matching of parts to vehicles). For usage in applications outside of normal use or not listed in this publication, NGK Spark Plug (Australia) Pty Ltd takes no responsibility. The goal is to keep the cylinder temperature between 550*c and 800*c which is about 1020*f to 1470*f. This temperature range is cool enough to prevent knock and not melt the plug tip, but still hot enough to … 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. Dexron | Heat Range: (click for larger image) Heat Range = Ground Strap, the ground strap indicates the heat-range of the spark plug. The setting of combustion deposits on the insulator tip is caused by an imperfect combustion due to … NGK platinum plug = BPR6EVX. If you are unsure of the correct heat range to use, always start with a colder spark plug. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Introduction. This will not hurt the 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. Opie Oils, The Fuel Depot, Cardrew Industrial Estate, Redruth, Cornwall, TR15 1SS. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Low power engines - low heat range (or hot) spark plug, High power engines - high heat range (or cold) spark plug. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. A spark plug’s heat range has no relationship to the actual voltage transferred though the spark plug. 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. A spark plug’s heat range is the temperature range in which a plug works well thermally. Generally, if a plug has a hotter heat rating it's simply not as thermally resistant as a cooler graded plug. Commonly, you can spot a low heat range (or hot) spark plug as it typically has a long thin insulator nose which can heat up quickly / easily and will not dissipate warmth to the metal shell as rapidly, where as a high heat range (or cold) spark plug has a short thick insulator nose which will transfer heat much easier. The heat rating of a spark plug is the measure of its ability to transfer heat received from the firing end of the plug into the cylinder and engine cooling system. If you need to know which spark plugs are suitable for your vehicle, simply use our handy spark & glow plug product lookup. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Cold plugs are used in High-Performance Engines, the heat range classification is basically the ability of the Spark Plug to dissipate heat from the … What is a Spark Plugs Heat Range? … All applications, illustrations and technical information detailed on this site have been assembled based on the latest information available. Got a modified or track car? This can be very damaging to your vehicles engine as the plug will overheat causing abnormal ignition firing (pre-ignition), that can lead to melting of the spark plug electrodes as well as piston seizure and erosion. WE'RE OPEN FOR BUSINESS & DELIVERING TO YOUR DOORThe Opie Oils web site is trading as normal - the majority of deliveries are made within 1-3 working days. Product linkage to vehicles or equipment from this publication are considered under normal conditions of use, fitted by a professional. It is the measure of how fast the spark plug tip dissipates combustion heat. Spark Plug Heat Ranges Explained High heat range plugs are used in less powerful, Non Performance, Standard Engine types. The part number you have entered is unknown or incorrect. • HIGHER Heat Range • HOT PLUG Why is Heat Range Critical? 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). Randall Young provided he usual thorough explanation: For almost any given brand of plug, the letters determine all the plug physical dimensions, while the number is the heat range. This web site and all data within is copyright. The copyright lives with Opie Oils, TecAlliance and the various part manufacturers who have supplied us their data for the purposes of listing products and matching products to vehicles, including: TecAlliance Statutory Notice: By continuing to browse the site you are agreeing to our use of cookies. For example, a 2 heat range in Pulstar is not the same as a heat range 2 in Autolite nor the same in Bosch. Commonly, you can spot a low heat range (or hot) spark plug as it typically has a long thin insulator nose which can heat up quickly / easily and will not dissipate warmth to the metal shell as rapidly, where as a high heat range (or cold) spark plug has a short thick insulator nose which will transfer heat much easier. Note: This cross-reference is a guide only and may not be suitable for all vehicles. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. It must do this in a controlled manner that will: 1. Typically the heat range for NGK Spark Plugs varies from 2-11. For security and data protection reasons It is highly recommended that you update your browser. Just enter your vehicle details to get started! 2544 is the coldest plug in that plug family, and 2546 is the hotest. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range … 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). This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Although not as damaging as having a too low rated plug, the effects can still be detrimental to your engine. Most spark plug manufacturers recommend that the tip temperature remain between 500° C and 850° C. Heat ranges are designated by each spark plug manufacturer with a number. Opie Oils Limited (all other content, including but not limited to lubricant advice & recommendations). VW, BMW | Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. The heat range numbering system used by spark plug manufacturers is not universal. If the plug is too cold, the plug will eventually foul and a misfire will occur. When setting the spark plug's gap for installation, use the automobile manufacturer's recommended gap. Ford | NGK Spark Plug Heat Rating. 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. The heat range of a spark plug is defined as its ability dissipate heat from the tip." Choosing the right heat range is crucial for high performance engines. It must do this in a controlled manner that will: 1 brands of spark plug will foul. Higher heat range only indicates the thermal characteristics of a spark plug dissipates its firing end heat the. Under normal conditions of use a simple lookup that can find the heat! For High Performance engines, if a plug works well thermally the thermal of. Detrimental to your engine a simple lookup that can find the correct range... 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