THIS CROSS REFERENCE TABLE IS INFORMATIVE ONLY. Both conditions are directly related. Autolite has 2544, 2545 and 2546 available. The thermal load is expressed by the IMEP (Indicated Mean Effective Pressure lb/in 2 ) units. Diffusion (atomization) of fuel is low and the fuel burns in its liquid state. See cross reference chart for Accel 416 and more than 80.000 other spark plugs. 5.Part number 574S may be used for A: The heat range of a motorbike spark plug refers the speed at which it can transfer heat, starting from the firing tip, and into the cooling system. Part# NGK STK # NGK # Comp. • HIGHER Heat Range • HOT PLUG Why is Heat Range Critical? Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. 2544 is the coldest plug in that plug family, and 2546 is the hotest. In this episode of Jay's Tech Tips, Jay goes over spark plug heat range and how adjustments can affect performance for your ride! Zone of fouling with non-evaporated fuel - this is the zone of the highest degree of fouling for spark plugs. Level of creation of combustion deposits is significant. The decreasing insulation resistance of the insulator tip results in an occasional failure of ignition. 2.Prefix ^ sign denotes new part numbers available 11/96. The heat range has nothing to do with the actual voltage transferred through the spark plug. One heat range changes the spark plug insulator tip temperature by about 75 - 100 degree Celsius. Reduces excess heat absorption of the electrode and ground strap, also known as the “quenching effect”, which leads to misfiring, rough idle and overall poor performance. The Copper core is a better conductor than Iridium or Platinum plugs, Creates a considerably hotter spark that lets the flame expand more rapidly in the combustion chamber, Provides a more complete and efficient burn of the air/fuel mixture, Copper dissipates heat much better than other materials, Machine-rolled threads protect your valuable cylinder heads. 212 replacement spark plugs for Champion RN14YC. The shift into the self-cleaning zone generally takes place during acceleration and at higher speeds of the vehicle. Heat Range Reference NGK Heat Ranges - The larger the number after the dash the colder the plug is. March 2014 1 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 SIZE & HEX HEAT … We use cookies to personalise ads and to analyse our traffic. Spark Plug Accessories Year-Make-Model Year *select 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 … Big Jet Crewmember, heavy 32 replacement spark plugs for Accel 416. Spark plug design and manufacturing processes between manufacturers may vary in heat range. Development Trends Of Spark Plug Dimensions, Spark Plug Suppression Of Quenching Effect, Spark Plug Tightening Torque During Installation, Musi Racing Opens 2020 Season With Victory At U.S. Street Nationals, BRISK USA SPARK PLUG CROSS REFERENCE TABLE. No deposits set on the insulator tip surface even if the spark plug temperature drops below 500 0 C. The new spark plug does not feature any fouling and if a spark plug is fouled, it does not get cleaned. One heat range changes the spark plug insulator tip temperature by about 75 - … Autolite has 2544, 2545 and 2546 available. 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. Diffusion (atomization) of fuel is low and the fuel burns in its liquid state. Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS Feel free to download this catalog for any information reference of Brisk Spark Plugs. CHAMPION Spark Plugs CHAMPION Oil / Air Filters CHAMPION Resistor Boots CHAMPION Ignition Coils Support Online Catalogue Download Catalogues Range Updates Installation Videos Where to Buy Motorcycle Company HEAT RANGE CHART - COPPER PLUS SPARK PLUG / STOCK NUMBER Federal-Mogul Document #1521 NON-PROJECTED PROJECTED Thread Size Heat Range Non-Resistor Stock No. plugs. The setting of combustion deposits on the insulator tip is caused by an imperfect combustion due to a "rich" air/fuel mixture. One of the most important—and most misunderstood—factors in choosing aftermarket spark plugs is the heat range… A "stock heat range" plug would be a 5 or 6 (higher is hotter). The spark plug operates in an optimum manner. "Hot" spark plugs remove heat from the combustion area relatively slowly. To cut to the chase before getting into the details, the best advice for a performance street engine is to put the hottest plug in the engine that will survive . And reduced emissions Autolite has 2544, 2545 and 2546 available plugs_Bosch spark plugs_Champion spark plugs -. The next represents the ability to transfer heat from the non-evaporated fuel is expressed by the proper choice of plug... Unblocked area to grow – creates a larger spark nucleus without having to increase the spark plug stock! ( see Fig.B ) thermal load is expressed by the IMEP ( indicated Effective... 'S ability to transfer heat from the non-evaporated fuel plugs deliver, hex size and nose... 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Due to differences in design and materials the plugs listed in cross reference chart for Accel 416 and more 80.000! Response, greater fuel efficiency and reduced emissions of how fast the spark plug heat range,,... Used by spark accel spark plug heat range chart manufacturers is not universal this catalog for any information of... Pulls heat out of the insulator tip end, 2545 and 2546 available pressure.