As a result, more heat stays in the ceramic firing end and less is dissipated to the engine. Note: This cross-reference is a guide only and may not be suitable for all vehicles. 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. What is a Spark Plugs Heat Range? If a spark plugs temperature remains too low it can cause loss of ignition spark due to deposit build up on the firing end, which in turn will leave your engine struggling / down on power. Choosing the right heat range is crucial for high performance engines. To make things easier we've made this page to explain a few things, here you will find an explanation of heat ranges and how it can effect your engine, plus a cross reference table for heat ranges of some of the most common brands. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. The heat range numbering system used by spark plug manufacturers is not universal. Opie Oils, The Fuel Depot, Cardrew Industrial Estate, Redruth, Cornwall, TR15 1SS. Opie Oils has a simple lookup that can find the correct spark plugs for your vehicle in seconds. Just enter your vehicle details to get started! Spark Plug specification is subject to change without notice. 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: (click for larger image) Heat Range = Ground Strap, the ground strap indicates the heat-range of the spark plug. This means the spark plug will heat up easily and reach its optimal operating temperature. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. To view the products that are specifically suited to your vehicle, simply select the appropriate options below. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. 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 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. Introduction. A switch in heat range of the spark plug will change the tem-perature of the spark plug tip by 70-120 degrees. 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. 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. 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 … 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. 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. A spark plug’s heat range is the temperature range in which a plug works well thermally. Racing Heat Range and Tuning Guide. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. This will not hurt the 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. 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. Generally, if a plug has a hotter heat rating it's simply not as thermally resistant as a cooler graded plug. The heat range of a spark plug is the range in which the plug works well thermally. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. He also added that the Triumph 6 cylinder engine uses a 14mm with .750 reach. Until you've updated you may not be able to check out. Please refer to our application listings for full details. 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. If you need to know which spark plugs are suitable for your vehicle, simply use our handy spark & glow plug product lookup. NGK Spark Plug Heat Rating. 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. Can't find what you're looking for, or need some help? 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. This web site uses cookies. Renault | 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. Conversely, a high heat range (or cold) spark plug has a short thick insulator nose which will dissipate heat much easier (above right). This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Whether the plug is to be installed in a boat, lawnmower or race car, it has been found the optimum combustion chamber temperature for gasoline engines is between 500°C–850°C. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … 2544 is the coldest plug in that plug family, and 2546 is the hotest. Ever wonder how spark plug heat ranges convert across brands? The heat range numbering system used by spark plug manufacturers is not universal. When setting the spark plug's gap for installation, use the automobile manufacturer's recommended gap. 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. Typically the heat range for NGK Spark Plugs varies from 2-11. The data shown here, particularly the database as a whole, shall not be copied. 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: 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. NGK platinum plug = BPR6EVX. 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. 0 Items A colder heat range spark plug has an insulator design with a shorter heat flow path to the … For example, a 2 heat range in Pulstar is not the same as a heat range 2 in Autolite nor the same in Bosch. 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. By continuing to browse the site you are agreeing to our use of cookies. If you are using Internet Explorer 8 or 9, you can solve this problem by going to Tools > Internet Options > Advanced and ticking the 'Use TLS 1.2' option. If it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss. For usage in applications outside of normal use or not listed in this publication, NGK Spark Plug (Australia) Pty Ltd takes no responsibility. 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. 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. Run hot enough to burn off combustion Setting a Proper Gap. The heat range of a spark plug is defined as its ability dissipate heat from the tip." … Stay cool enough to avoid pre-ignition and/ or electrode destruction. Rather, the heat range is a measure of the spark plug’s ability to remove heat from the combustion chamber. It is essential to use a spark plug that fits a specific engine and its conditions of use. It must do this in a controlled manner that will: 1. 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). Low power engines - low heat range (or hot) spark plug, High power engines - high heat range (or cold) spark plug. Ford | All applications, illustrations and technical information detailed on this site have been assembled based on the latest information available. 2544 is the coldest plug in that plug family, and 2546 is the hotest. 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. In broad terms, spark plugs are often referred to as “hot plugs” or “cold plugs.” Rather, the heat range is a measure of the spark plug’s ability to remove heat from the combustion chamber. 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. No matter what type of spark plug you choose, an optimal heat rating for your vehicle’s engine is important. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. 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). For example, a 14 heat range in Denso is not the same as a 14 heat range … Ford | TecAlliance (who provide their TecDoc vehicle list and TecDoc data for matching of parts to vehicles). It is the measure of how fast the spark plug tip dissipates combustion heat. 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. 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