Find NGK Spark Plugs Spark Plugs Shorty Spark Plug and get Free Shipping on Orders Over $99 at Summit Racing! E3 does not have a standardized heat range identifier. 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. Summit Racing Gift Cards - Always the Perfect Gift! The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). NGK V-Power Spark Plug Heat Range 5 (FR5) NGK V-Power Spark Plug (ZFR7F-11) NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. 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. Specials. Generally, if a plug has a hotter heat rating it's simply not as thermally resistant as a cooler graded plug. For example, take the 254x plug series. Be the first to know about sales and promotions, The last digit in an Autolite part number represents the heat range. The special V-cut center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitibility. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … For a spark plug to function properly, it must have a tip temperature high enough to burn off carbon deposits (self-cleaning) and avoid fouling, while remaining low enough to avoid overheating the ceramic firing end and pre-ignition. New NTK Technical Sensors. Free Returns. 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. NGK SPARK PLUG 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. Spark Plugs; Reverse Engineer Parts by Dimension. For most vehicles, the factory recommended heat range is sufficient; however, on some modified or special-use engines, alternative heat ranges may be necessary. high performance, high revving, tuned or driven very hard), the shorter heat path will conduct heat more quickly, ensuring that the tip does not overheat. 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. $2.39 NGK 2771 UR5 Spark Plug - Same Day Shipping. Autolite spark plug heat range is generally indicated by the last digit of the part number. Summit Racing Part Number: NGK-2771. 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. The world leader in spark plug technology for over 80 years. We use cookies to personalise ads and to analyse our traffic. Shorty Spark Plug: No Resistor: Yes Manufacturer Heat Range: 5 For example, take the 254x plug series. 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. Typically the heat range for NGK Spark Plugs varies from 2-11. We are not NGK Spark Plugs USA. 1969. NGK.com specializes in hard to find NGK products. Est. The spark plug is heated during combustion and must dissipate that heat to the cylinder head at a certain rate to avoid overheating the ceramic firing end. As such a colder plug may be required. These ideas are both false. Find many great new & used options and get the best deals for NGK Spark Plug 2771 UR5 at the best online prices at eBay! Manufacturer's Part Number: UR5. 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. A COLDER or 'harder' spark plug is more suited to a hotter running engine (i.e. A hotter heat range spark plug has an insulator design with a longer heat flow path to the metal shell of the plug. Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. Don't just ask for a spark plug, insist on NGK. View All Current Rebates and Promotions . Learn more. Share - NGK V-Power Heat Range 5 Spark Plug (UR5) - ngk2771. NGK V-Power Heat Range 5 Spark Plug (UR5) - ngk2771. Free Shipping On All Sensors Over $75. Choosing the right heat range is crucial for high performance engines. Depending on the modification will … One misconception is that the heat range is related to the spark temperature or intensity. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central; Call Us. 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