Spark Plug Heat Range Cross Reference . Air (atmospheric) pressure and cylinder pressure decrease as altitude increases. Binder ID: 2133843. Call us at 713-459-6977. Accessories. This usually results in a misfire and further fouling. The heat rating is a measure of the amount of heat dissipation. Have an OE part number or competitors part number you'd like to find an NGK equivalent for? Knock may occur more easily. Part Number: NGK-93400 Not Yet Reviewed Here, R5671A represents the plug type and -11 represents the heat range. Example a R5671A-7 (a good street/strip plug) is a cold plug where a R5671A-10 is a very cold plug used for large 400hp and up nitrous and other power adder applications) We are not NGK Spark Plugs USA. Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63. Example: R5671A-10 has a heat range of 10. Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA. Autolite ® Spark Plug Heat Range Chart Tabla de grados térmicos de bujías Autolite ® A B C D E F G H I J. THREAD IRIDIum XP same heat range. BOBBY GERHART AND BRISK RACING SPARK PLUGS IN THE WINNERS CIRCLE AT DAYTONA 500. #4 - Let's take a non spark plug example. When the spark plug firing end (tip) temperature exceeds 800°C, pre-ignition originating from the overheated insulator ceramic can occur. Autolite's numbering system does not have a standardized heat range identifier. There is a greater surface area exposed to the hot combustion gases. When the heat range is too cold for the engine speed, the firing end temperature will stay below 450°C and carbon deposits will accumulate on the insulator nose. Hot Type = A lower number: Long Insulator Nose. Our NGK cross reference includes over 80,000 records! This is called “thermal performance,” and is determined by the heat range selected. COLD MEDIUM HOT Racing Plug Number Old Racing Plug Number Champion NGK AR12 12 RV9YC R5674-7 AR13 13 RV9YC R5674-6 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 Significantly increasing the static/dynamic compression ratio will increase cylinder pressures and the octane requirement of the engine. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. Excessively rich air-fuel mixtures can cause the plug tip temperatures to decrease and carbon deposits to accumulate, possibly causing fouling and misfires. Some basic structural factors affecting the heat range of a spark plug are: The major structural difference affecting the heat rating is the length of the insulator nose. Heavy knock can cause breakage and/or erosion of combustion chamber components. Heat Range; Identification and Construction; Maintenance; Spark Plug Diagnosis; Spark Gap Location and Design; Advantages; Contact; Deal Of The Day; My Account. Spark plugs may physically appear to be the same but have a different heat range based on the insulator design or shape. Part# NGK STK # NGK # Comp. For NGK Racing Plugs, the heat range is located AFTER the hyphen. Part Specification Listings: All available part specifications have been included in the part details page. Use the Manufacturer's Numbering Systems to decipher each spark plug manufacturers alphanumeric part system. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Forgot your password? At this time the colder Pulstar heat range 2 is available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8. However, the Bosch rating system is the opposite of NGK’s in that a low number represents a colder plug (2 is the coolest) and a higher number a hotter plug (13 is the hottest). Knock is sometimes referred to as “ping” or “detonation.”. An improperly installed (insufficient torque) spark plug can also result in pre-ignition due to inadequate heat transfer. Autolite has 2544, 2545 and 2546 available. Remember Me Log in . ngk pulstar denso champion bosch; hotter: 2 9: 18, 19: 10 4: 1: 14: 14, 16: 9 5: 1: 16: 11, 12: 8 6: 1: 20: 9, 10: 6, 7 7: 1: 22: 7, 8: 5 8: 2: 24: 6, 61, 63: 4 9: 2: 27: 4, 59: 3 9.5: 2: 29: 57 10: 2: 31: 55: 2 10.5 32: 53 11 34 11.5 35 colder: 12 37 Due to the decreased knock, there will be less audible “warning” from knock before the spark plug overheats and pre-ignites. Heat is transferred from the insulator nose to the metal shell of the spark plug. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. The listed heat range represents the plug's ability to dissipate heat. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. We've used the cross-reference to find the Denso equivalent to a Bosch oxygen sensor #13198. We use cookies to personalise ads and to analyse our traffic. Generally, there are four kinds of tests used. Higher cylinder temperatures near the knock level will bring the spark plug firing end temperature closer to the pre-ignition range. Ngk standard spark plug dcpr7e 3932 advance auto parts lt1 and ls1 spark plug info w afr mrk motorsports autolite er provides good details on spark plugs ls1tech spark plug info for m37 and other vehicles all about mustang spark plugs and ignition ponents. A numbering system is also available for NGK spark plug resistor caps. Spark plugs may physically appear to be the same but have a different heat range based on the insulator design or shape. Technical. How do I interpret NGK's numbering systems? Dark coloring, such as heavy black wet or dry deposits, can indicate an overly rich condition, too cold a heat range spark plug, a possible vacuum leak, low compression, overly retarded timing or too large a plug gap. Autolite has 2544, 2545 and 2546 available. Learn More . If the air-fuel mixture is too rich, decreased performance and/or carbon fouling can result. 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. Surface area and/or length of the insulator nose. Q & A Questions and answers. NGK Spark Plug Upgrade Chart ORIGINAL PLUG STOCK NO. The insulator nose of a hotter spark plug has a longer distance between the firing tip of the insulator and the point where insulator meets the metal shell. Ngk Spark Plug Heat Range Chart Zepan. Link to Binder: Link to Current Tab: Email Embed Facebook Twitter Classroom Upgrade to Pro Today! Pre-ignition occurs when the air-fuel mixture is ignited by a hot object/area in the combustion chamber before the timed spark event occurs. We also see that an NGK 6 is 2 heat ranges colder than an NGK 4. Typically the heat range for NGK Spark Plugs varies from 2-11. As a result, spark plug tip temperature will also decrease. If an air-fuel ratio meter or gas analyzer is not available, it will be necessary to visually inspect the spark plugs frequently during the tuning process to determine the proper air-fuel mixture. 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. 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. 2. Shop Now . Spark plugs must provide a path and a location for electrical energy from the ignition coil to create a spark used to ignite the air-fuel mixture. There are 140 replacement spark plugs for NGK GR4. As the air temperature or humidity increases, the air density decreases, requiring a leaner air-fuel mixture. The premium Pro 50 GB plan gives you the option to download a copy of your binder to your local machine. Racing Heat Range and Tuning Guide. Some types of fuel additives in lower quality fuels can cause spark plug deposits that can lead to misfires, pre-ignition, etc. 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. Then, it's transferred to the coolant passages. same heat range. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. The NGK range of resistor caps provide the perfect connection. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or ). A colder heat range spark plug may be necessary if the ignition timing has been advanced to near the knock level. Name: Motorcraft spark plug heat range chart. A misfire occurs when the spark travels the path of least resistance instead of jumping across the gap. NGK racing spark plugs are built to withstand the severe mechanical and thermal shock associated with high-revving, high-compression engines. As a result, less heat stays in the ceramic firing end and more is dissipated to the engine. Thermal conductivity of the insulator, center electrode, etc. The heat range of a spark plug is the range in which the plug works well thermally. Therefore, the path for the dissipation of heat from the insulator nose to the cylinder head is longer and the firing end stays hotter. Find parts by dimension and feature! The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … NGK GR4 - Alternative spark plugs . BRISK … Low heat range plugs have long insulator leg sections and the surface area affected by the flame and the gas pocket capacity are large. A colder heat range spark plug has an insulator design with a shorter heat flow path to the metal shell of the plug. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. The two most common causes of spark plug problems are carbon fouling (< 450°C) and overheating (> 800°C). NGK.com specializes in hard to find NGK products. 2544 is the coldest plug in that plug family, and 2546 is the hotest. ngk spark plug upgrade chart original plug stock no. The Untold Story About Ngk spark plug heat range comparison chart You Must Read The doctor must bear in mind that the consequence of the laboratory examination isn’t the only diagnostic variable needed to validate the state of the patient. Eventually, it's cooled by the radiator. NGK spark plugs use a heat range index ranging from 2 to 12 with 2 being the hottest spark plug and 12 being the coldest. Spark plugs have been around as long as internal combustion engines have and are often a misunderstood component. 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. If the plug is too hot, it can result in Pre-Ignition. The two colliding flame fronts contribute to the “knocking” sound. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central; Call Us. Heat is transferred from the insulator nose to the metal shell of the spark plug. Structure of the center electrode such as a copper core, etc. (Knock is sometimes referred to as “spark knock.”) Retarding the ignition timing will reduce knock. 140 replacement spark plugs for NGK GR4. Spark Plugs Spark plug construction. Using the Reverse Engineering Tool. Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA Relative position of the insulator tip to the end of the shell (projection), Continuous low-speed driving and/or short trips, Reduced compression and oil usage due to worn piston rings/cylinder walls, Insufficient tightening torque and/or no gasket, Fuel octane rating too low (knock is present), Continuous driving under excessively heavy load, Insufficient engine cooling or lubrication. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). Be the first to know about sales and promotions, NGK Spark Plug Resistor Cover Numbering System, Finding and Comparing NGK Part Specifications. Does anyone know the number of a plug 1 range hotter? many heat ranges to suit all engine applications. As a general guideline, among identical spark plug types, the difference in tip temperature from one heat range to the next is approximately 70°C to 100°C. The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). NGK lists a design symbols chart in the front of every spark plug catalog. NGK have plenty of accessories goods for your needs. The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS 6222 BPR5HS 45 3210 B4 41-965 2467 PTR5A-13 45L 3112 B4L 46 3210 B4 41-974 7862 PZTR5A-15 45NS 7832 BP5ES If the selected spark plug heat range is too cold, the spark plug may begin to foul when the engine speed is low or when operating in cold conditions with rich air-fuel mixtures. My Cart Find My Vehicle's Spark Plug. The last digit in an Autolite part number represents the heat range within a plug family. IRIDIUM UPGRADE STOCK NO. Installation Guide on how to install. Spark Plug Info **Note: Heat ranges are determined by NGK standards. This may cause damage to the spark plug and/or seriously damage the engine. 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 heat rating is expressed as a number. Part# NGK STK # NGK # Comp. A hot-type spark plug has a longer insulator nose. Carbon fouling occurs when the spark plug firing end does not reach the self-cleaning temperature of approximately 450°C (842°F). The spark plug firing end temperature must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. I've been searching for an hour for a heat range comparison chart but I guess they aren't too popular these days. Heat Rating of a Spark Plug. Blood test is the most commonly used test and is thought of as very precise. PLATINUM UPGRADE STOCK NO. NGK PULSTAR DENSO CHAMPION BOSCH; HOTTER: 2 9: 18, 19 ... COLDER: 12 37 Where is Autolite? Introduction. Low octane fuel has a low resistance to knock (low resistance to ignition). I have AGSF32C plugs that arrived in my 351/385 crate motor from Ford. A colder spark plug functions in an opposite manner. Whether the spark plugs are fitted in a lawnmower, boat, or a race car, the spark plug tip temperature must remain between 500C-850°C. We are not NGK Spark Plugs USA. Autolite ® Spark Plug Heat Range Chart Tabla de grados térmicos de bujías Autolite ® A B C D E F G H I J. THREAD IRIDIum XP Refer to recommendation section for specific engine applications Comp. Depending … Charts & Tools Charts & Tools; FAQs FAQs; Non-Automotive Non-Automotive; Product Information Product Information; Vehicle Maintenance Vehicle Maintenance; Learning Center. The heat range must be carefully selected for proper spark plug thermal performance. This is called carbon fouling. Spark plugs are a “window” into the engine and can be a valuable diagnostic tool. Yes. 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. NGK spark plugs use a heat range index ranging from 2 to 12 with 2 being the hottest spark plug and 12 being the coldest. This basic guide is designed to assist the technician, hobbyist or race technician in understanding, using and troubleshooting spark plugs. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. Spark Plug Heat Range Cross Reference . Selecting the Right Heat Range. NGK.com specializes in hard to find NGK products. If the tip temperature is lower than 500°C, the insulator area surrounding the centre electrode will not be hot enough to burn off … Link to Binder: Link to Current Tab: Email Embed Facebook Twitter Classroom Upgrade to Pro Today! NGK Resistor Caps The cover body is made of sturdy phenolic resin that endures high heat and high tension. The heat range numbering system used by spark plug manufacturers is not universal. 2. Pre-ignition will dramatically raise the cylinder temperature and pressure, which can melt and hole pistons, burn valves, etc. Find NGK Spark Plugs Spark Plugs 8 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! It is most often caused by the wrong (too hot) heat range spark plug, and/or over-advanced ignition timing. From the world leader in Spark Plug and Ignition Lead technology comes a premium range of quality Ignition Coils. Create an account ; Forgot your username? Refer to recommendation section for specific engine applications Comp. Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63. An example of an NGK racing plug is R5671A-11. Rather, the heat range is a measure of the spark plug’s ability to remove heat from the combustion chamber. As the air temperature or humidity decreases, the air density increases, requiring a richer air-fuel mixture. The insulator nose of a hotter spark plug also has a greater surface area that is exposed to more of the ignited gases and is easily heated to higher temperatures. Spark Plug, Racing, Tapered Seat, 14mm Thread, 25mm Reach, Heat Range 8, With Resistor, Each. platinum upgrade stock no. The spark timing can be advanced further because ethanol blend fuel has a higher resistance to knock (higher octane). If the engine is operated near the knock level, a colder heat range spark plug may be necessary due to the resulting increased cylinder temperatures. If you guys would like to see certain plug manufacturers added, let me know. How is it determined? ngk pulstar denso champion bosch; hotter: 2 9: 18, 19: 10 4: 1: 14: 14, 16: 9 5: 1: 16: 11, 12: 8 6: 1: 20: 9, 10: 6, 7 7: 1: 22: 7, 8: 5 8: 2: 24: 6, 61, 63: 4 9: 2: 27: 4, 59: 3 9.5: 2: 29: 57 10: 2: 31: 55: 2 10.5 32: 53 11 34 11.5 35 colder: 12 37 The following is a brief list to consider in avoiding reduced performance and/or expensive engine damage. Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. Heat Range Conversion Chart Learn More . In fact, NGK estimates an increase of 70° to 100° for every 10° advance in ignition timing. And remember : A higher heat-range number does not improve engine performance, it increases the plug's ability to dissipate heat. Wondering what the numbers and letters on an NGK spark plug cap mean? If the spark plug has completely fouled, and the engine will not operate correctly, the spark plug may need to be replaced and the fouling cause identified. See cross reference chart for NGK GR4 and more than 80.000 other spark plugs. For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. Part# NGK STK # NGK # Comp. In some cases, the insulator nose can usually be cleaned by operating the engine at higher speeds in order to reach the self-cleaning temperature. Learn More . to rise, and will lead to pre-ignition if the knock is uncontrolled. If it's too cold, it can result in fouling and misfires. The most critical factor for a spark plug that needs to be considered when an engine is modified is HEAT RANGE. Overheating will cause the electrodes to wear quickly and can lead to pre-ignition. 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. When inspecting a spark plug that has experienced overheating or pre-ignition, blistering on the ceramic insulator and/or melted electrodes can sometimes be found. Heat range; Electrode gap; HEAT RANGE. If the engine is to be operated at high RPM, under a heavy load or at high temperatures for long periods, a colder heat range may be needed. What's firing your engine? A very expensive heat range test can be performed however a more viable option is to start with a colder heat range spark plug and perform some testing. Name: Motorcraft spark plug heat range chart. NGK: 10: 9: 8: 7: 6: 5: DENSO: 31: 27: 24: 22: 20: 16: Heat range is the measure of how fast the spark plug tip dissipates combustion heat. Conversely, if the engine is to be operated at low speeds or at low temperatures for long periods, a hotter heat range might be needed to prevent fouling. Ford Vehicles Brisk Spark Plug Application Charts 2008 - 2009 Ford 3 Valve engines with the new 12mm ... (heavy modified app. Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS 6222 BPR5HS 45 3210 B4 41-965 2467 PTR5A-13 45L 3112 B4L 46 3210 B4 41-974 7862 PZTR5A-15 45NS 7832 BP5ES 40TS 5034 R5674-7 41-980 7740 PTR5C-13 45S 3332 XR5 41-101 … Choosing the right heat range is crucial for high performance engines. 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. Also, since the heat release path from the insulator leg section to the housing is long, heat dispersal is low and the temperature of the center electrode rises easily. Heat Range Cross Reference Chart: Ever wonder how spark plug heat ranges convert across brands? Find NGK Racing Spark Plugs 8 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. What is Heat Range? Higher altitude = less air = less fuel. A colder heat range spark plug may be necessary due to the increased cylinder temperature as boost pressure (manifold pressure) and subsequent cylinder pressure and temperature increase. The results give us two Denso equivalents, 234-4072 and 234-4151, as well as an NGK/NTK equivalent. Typically the heat range for NGK Spark Plugs varies from 2-11. 117 replacement spark plugs for NGK UR4. The stock number is 6596. Low quality and/or low octane fuel can cause knock which will elevate cylinder temperatures. If the heat range is not optimal, then serious trouble can be the result. The primary function of the spark plug is to ignite the air-fuel mixture within the combustion chamber under any operating condition. Exhaust gas temperature sensors. When the spark plug firing end (tip) temperature exceeds 800°C, pre-ignition originating from the overheated insulator ceramic can occur. Some NGK Racing Plugs are also available in half heat ranges. ), Mismatched ignition system components (plug resistance/wire resistance, ignition coils/igniter modules, etc. We also share information about your use of our site with our advertising and analytics partners. 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. If the air-fuel mixture is not properly richened, and the mixture is too lean, higher cylinder pressures/temperatures, knocking, and the subsequent increase in the spark plug tip temperatures can result. Use the Heat Range Conversion Chart to compare the heat ranges between spark plug brands. Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. The most serious result of selecting a heat range that is too hot is overheating. Example a R5671A-7 (a good street/strip plug) is a cold plug where a R5671A-10 is a very cold plug used for large 400hp and up nitrous and other power adder applications) Autolite Heat Ranges - The larger the last digit in the part number, the hotter the plug is. Heat Range Reference. Heat Range Conversion Chart. Have an OE part number or competitors part number you'd like to find an NGK equivalent for? If the heat range is not optimal, then serious trouble can be the result. Part# NGK STK # NGK # Comp. When enough carbon accumulates, the spark will travel the path of least resistance over the insulator nose to the metal shell instead of jumping across the gap. For example, take the 254x plug series. Fouling can occur more easily if the air-fuel mixture is not adjusted to compensate for the altitude. NGK Spark Plugs is the world’s leading manufacturer of spark plugs, glow plugs, and lambda sensors, and supplies a vast range of products from the field of ignition and sensor technology. Modern exhaust after treatment systems require control in regard. Occurs when part of the air-fuel mixture in the combustion chamber, away from the spark plug, is spontaneously ignited by the pressure from a flame front originating from the spark plug. There are many external influences that can affect the operating temperature of a spark plug. The experienced tuner can use spark plugs to find the root cause of problems, determine air-fuel ratios and increase vehicle performance. Pre-ignition will dramatically raise the cylinder temperature and pressure, which can cause serious and expensive engine damage. A sufficient amount of voltage must be supplied by the ignition system to spark across the spark plug gap. Misfires can be caused by the following: Worn or deteriorated ignition system components, Spark timing excessively advanced or retarded, Damaged spark plugs (cracked insulator, melted electrodes, etc. 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. Using the NGK Cross 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. Spark Plug Cross Reference - HEAT RANGE CHART - Brisk spark plugs_NGK spark plugs_Denso spark plugs_Bosch spark plugs_Champion spark plugs. Knock occurs more frequently when using low octane fuel. The spark plug displays the condition inside the combustion chambers of the engine. NGK Heat Ranges - The larger the number after the dash the colder the plug is. 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. The premium Pro 50 GB plan gives you the option to download a copy of your binder to your local machine. March 2014. Spark plugs are designed to operate in a temperature range of 450 – 870°C, when an engine is modified (generally to produce more power which produces more heat) in turn the engine and subsequent spark plug temperatures increase. Our NGK cross reference includes over 80,000 records! Spark plug suggestions for 56 d500 315 hemi heat advisory spark plug range how to tune up and service l ngk spark plugs uk best spark plugs clicoldsmobileCant Find Ac Plug Heat Range Chart Hot Rod ForumSpark Plug Cross Reference Heat Range ChartSpark Plug Cross Reference Heat Range ChartAccel Copper Core Spark PlugsHeat Advisory Spark […] Pre-ignition occurs when the air-fuel mixture is ignited by a hot object/area in the combustion chamber before the timed spark event occurs. 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 … The increased cylinder temperature will cause the temperature of the combustion chamber components (spark plug, valves, piston, etc.) VIEW GALLERY. The exception to this is racing plugs. To contact them, click here. Summit Racing Gift Cards - Always the Perfect Gift! March 2014. It's fairly hard to compare each manufacturers heat range since there are so many factors involved but this is, in my opinion, the closest match for NGK's heat range system, which was used in the chart. iridium upgrade stock no. Resistor Caps. Knock is related to ignition timing. Gallery. We offer the latest technology in spark plug design & performance that can help you improve your engine performance & fuel economy. Multiple tools are available to find part dimensions and features. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Carbon deposits will begin to burn off from the insulator nose when the self-cleaning temperature is reached. Autolite spark plug heat range is generally indicated by the last digit of the part number. This is called “electrical performance.”. NGK Heat Ranges - The larger the number after the dash the colder the plug is. The heat range must be carefully selected for proper spark plug thermal performance. Resistance to knock ( higher octane ) amount of voltage must be carefully selected for spark..., insufficient coil primary and/or secondary voltage – voltage required to jump the spark plug overheats pre-ignites... And cylinder pressure decrease as altitude increases cylinder and plug temperatures to increase, possibly fouling! Bobby GERHART and BRISK Racing spark plugs for NGK UR4 and more is dissipated to the metal shell the! Binder to your local machine transferred through the spark plug, and/or over-advanced ignition.. And is thought of as very precise coil primary and/or secondary voltage – voltage required to jump spark! Gr4 and more than 80.000 other spark plugs low octane fuel from Ford knock and/or pre-ignition 12mm... ( modified... Range numbering system does not reach the self-cleaning temperature of a spark plug brands cover body is made sturdy... Dissipate the heat rating is a measure of the engine of 70° to 100° for every 10° advance in timing! Is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 ngk heat range charts. Available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8 use the range... System to spark across the spark plug firing end ( tip ) temperature exceeds 800°C pre-ignition! Champion Sparking plug Co. Ltd. 's Competition Department, 1973 in pre-ignition Free Shipping on Orders Over 99. Richer air-fuel mixture Make/Engine Search Departments ; brands ; Savings Central ; Call Us to the.: heat ranges convert across brands thought of as very precise can melt and hole pistons, burn valves etc... The cross-reference to find part dimensions and features -11 represents the plug 's to! Speed and heat range to prevent pre-ignition, etc. prevent pre-ignition, blistering the. The result Co. Ltd. 's Competition Department, 1973 cylinder pressure decrease as altitude increases to misfires, originating... You may need to go with a graph like that in the ceramic firing end tip... Ngk range of a spark plug is the coldest plug in that plug family plug displays condition! And increase vehicle performance be supplied by the combustion chamber range is not adjusted to compensate for the altitude to. Range has no relationship to the cylinder head a lower number: NGK-93400 Yet... The figure referred to as “ ping ” or “ detonation. ” advancing timing! Referred to as “ ping ” or “ detonation. ” 450°C ( 842°F ) to... 234-4072 and 234-4151, as well as an NGK/NTK equivalent hot object/area in the figure least resistance instead jumping! Decrease as altitude increases tip temperatures to increase by approximately 70° to 100°C as NGK/NTK... Dissipate the heat range and get Free Shipping on Orders Over $ 99 at Summit Racing R5671A-11... Premium Pro 50 ngk heat range charts plan gives you the option to download a copy of your to., Racing, Tapered Seat, 14mm Thread, 25mm reach, heat range is optimal. 'S too cold, it is impossible to chart an Autolite heat range Conversion chart to compare the range... Overheating will cause the cylinder head 19... colder: 12 37 Where Autolite! Technical information cold hot 140 replacement spark plugs for NGK UR4 and more is to! Ethanol blend fuel with high ethanol content in high-performance applications, a colder heat range chart. Your use of our site with our advertising and analytics partners begin to burn from. The result cause spark plug Info * * note: Due to the metal shell of the nose. Explanation of a spark plug Resistor caps Upgrade chart ORIGINAL plug STOCK no ethanol... Phenolic resin that endures high heat and high tension copper core,.! Plug gap serious and expensive engine damage fuels can cause spark plug Application Charts 2008 2009. Cold ’ a spark plug brands by spark plug firing end temperature must be kept low to... ” or “ detonation. ” chamber components ( plug resistance/wire resistance, ignition coils/igniter modules etc! Ngk part specifications is designed to assist the technician, hobbyist or race technician in understanding, and... Result in pre-ignition Due to the “ knocking ” sound the results give Us two equivalents. And to analyse our traffic blood test is the hotest specific engine applications Comp Yet! Internal combustion engines have and are often a misunderstood component GR4 and more than 80.000 other spark plug cover! Center electrode such as a copper core, etc. to knock ( low resistance to knock ( resistance. 'Ve used the cross-reference to find part dimensions and features other spark plug the relationship between the spark can.: Ever wonder how spark plug may be necessary: NGK-93400 not Yet Reviewed heat range and get Shipping. To dissipate heat conductivity of the spark plug heat is transferred from the insulator! Family, and 2546 is the range in which the plug tip temperature will also decrease or! Know about sales and promotions, NGK spark plugs to find the Denso equivalent to BOSCH. The flame and the surface area affected by the last digit in an opposite manner typically the range... Is controlled by the flame and the octane requirement of the spark,. A measure of the insulator nose when the air-fuel mixture is ignited by a hot object/area the. Functions in an Autolite heat range cross reference chart for NGK GR4 and more than 80.000 other spark plugs from. Applications, a colder heat range represents the heat rating is a greater surface area by. 14-22 and Champion heat ranges 4-6/59-63 have an OE part number often a misunderstood component sometimes found. Hot combustion gases less audible “ warning ” from knock before the spark... Can also result in fouling and misfires chart to compare the heat range must be carefully selected for spark! Secondary voltage – voltage required to jump the spark plug Info * *:... Which will elevate cylinder temperatures fuel has a low resistance to knock ( higher octane ) gas capacity... Determine air-fuel ngk heat range charts and increase vehicle performance the surface area affected by length... In design and materials the plugs listed in cross reference section are not alike! At Summit Racing, possibly resulting in knock and/or pre-ignition thought of as very precise system (... “ warning ” from knock before the timed spark event occurs Technical information hot. And pre-ignites the two colliding flame fronts contribute to the decreased knock, there are many external influences that lead! Affect the operating temperature of the engine and can lead to misfires, pre-ignition originating from the insulator design shape. Following is a greater surface area exposed to the cylinder head in fact NGK! Thought of as very precise ” and is thought of as very precise Resistor, each plug and... With high-revving, high-compression engines condition inside the combustion gases air-fuel mixtures can cause breakage and/or erosion combustion... Is determined by the flame and ngk heat range charts surface area exposed to the electrical energy transferred through the spark plug Charts. Ranges 4-7, Denso heat ranges 8-9, Denso heat ranges 8-9, Denso heat ranges.! Occurs more frequently when using an ethanol blend fuel with high ethanol in... The thermal characteristics of a spark plugs which can cause the electrodes to wear and. Also share information about your use of our site with our advertising and analytics partners heat in!

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