Racing Spark Plug Cross Reference for Autolite, NGK and Champion You'll need to cross reference for you application. I then ordered Accel Shorty 0416S and they were only about 1/16" shorter then the standard autolites I had already bought. Autolite Racing Spark Plug. AUTOLITE COPPER CORE SPARK PLUGSSET OF 8 PART # 3923 * ABOVE PHOTO IS A FILE PHOTO. Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. The most popular thread size for domestic plugs is 14 mm, although a few older Ford engines used the larger 18mm size back in the '60s. Bosch plugs are of the shorter design too and way cheaper! They can also be used for many other cylinder heads that require a plug of this thread depth. 14mm Thread, 0.460 in. The overall length has been reduced 3/16 in to 3/8 in (depending on the specific spark plug) to gain critical air gap between the spark plug boot and the exhaust manifold or header tube. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html Reply. Save Share. $4.95. The run of the mill NGK plugs that cross from the 414s, 3924, and RC12YC are a bit longer. 1967 Nova---LS3/4L70e 1970 c10—LSx/4L60e. Autolite has 2544, 2545 and 2546 available. Engines can vary widely by make and model. Hope this helps It also is a cross for the NGK BPM6A, the short version of the plug many of us use. 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. AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. Due to different engine modifications and conditions,a hotter or colder spark plug may be required. Replacing spark plugs can be a simple job, if you take things one step at a time. They are non resister plugs, may cause interference in your sound system and possibly the ECM. You looked up a 93 mustang 5.0, not the same heads as an explorer, or else we wouldnt even have these problems. Autolite Racing Spark Plug. Autolite has 2544, 2545 and 2546 available. I quit using Champion plugs in my big block Mopars several years ago and switched to Autolite plugs. The 98% pure copper core delivers increased heat dissipation for more reliable starts and reduced risk of overheating. Autolite AP605 Platinum Spark Plug. To start off our list, we’ve opted for this fantastic spark plug by Autolite that does everything you need it to for an affordable price; perfect for budget-conscious buyers who don’t want to compromise on quality and performance. Autolite Racing Spark Plug. These instructions should be considered for general guidance only. I didn't get to compare them to Accel but they have a lot of room for those tight headers, which was my problem. The best I've been able to find are the Autolite 3924. Make sure and read the part about how detonation makes the plug look cleaner.) NGK racing plugs LOG-IN or SIGN UP ... Autolite. They're short like the Accels, have a cut back ground strap, and have a long reach. I cross the heat range. These hot spark plugs are designed to reduce heat transfer and keep the tip of the spark plug insulated. The Autolite is the crossover from a Champion plug, CJ7Y recommended by those who have used it. Them accel shorty plugs are nice!!! 1967 Chevelle 496BB/TH400/Strange S-60 (Show and Go) 1967 El Camino 388SB/700R4/12-bolt … Accels race proven "Shorty" spark plugs are the cure for your "burnt plug boot" blues. Conversely, hot spark plugs are recommended for vehicles that are driven slower and for shorter distances. 2544 is the coldest plug in that plug family, and 2546 is the hotest. The majority of them can last up to 20,000 miles, whereas, high-performance iridium and platinum plugs can run 60,000 miles and even longer. March 2014. I can fit my finger in between the NGK plug and my summit headers (1-5/8" primaries). Vortec heads use a .750 reach plug. Brand:Autolite Product Line:Fram Autolite Racing Spark Plugs Part Type:Spark Plugs Shorty Spark Plug: No Resistor: No Electrode Core Material: Copper Electrode Tip Material: Chromium nickel alloy Insulator Type: Projected Spark Plug Thread Size: 14mm Spark Plug Reach: 0.750 in. S. Spark Plug Seat Style: Gasket Wrench Diameter: 13/16 in. On 383/400 /440 mopars it is also a big problem and this solves it. 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. If you want to run copper shorty plugs on gt40p heads you need the p526s, $15 each. NGK racing spark plugs are built to withstand the severe mechanical and thermal shock associated with high-revving, high-compression engines. Spark plug 411 - Technical spark plug info - Autolite. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. $4.95. This helps eliminate burning the spark plug boot or dimpling the header tube. 1.This application listing is to be used as a guide only. These were to long for two of the locations. These plugs are very short. For example, take the 254x plug series. I'm thinking of upgrading from autolite 25's to autolite 26's. Get spark plugs for a mid to late 60's Corvette, I believe the autolite number is AP 144 or APP 144. Autolite AR94 Spark Plugs for 602, 603, 604's (Set of 8) $38.99 Quick View High Velocity Heads. Spark Plugs For Vortec Heads: 5613611 R44LTS, set of 8 5614210 MR43LTS, set of 8 25164641 #3, Rapid Fire style, set of 8 P526S Accel U-Groove “SHORTY” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, set of 8 RS12YC Champion Autolite 104 or 26 ACCEL 516 Bosch HR10B or HR10BX, HR9DC This helps eliminate burning the spark plug boot or dimpling the header tube. For example, take the 254x plug series. YOU WILL RECEIVE 8 OF PART #AUTOLITE 3923These are the spark plugs we strongly recommend for our NKB and Procomp heads. I suggest that you do a Google search for Autolite Shorty Spark Plugs. The accel 'shorty plug' is advertising BS (like most of thier product), they are the same length as autolite race plugs but without the high quality materials of an autolite… 3. I'm now running the Autolite AR series plugs (AR132's). Couplers Plugs Carburetor and Fuel Pump Adapters Reducers Bulkhead Adapter Fittings Bulkhead Nuts; ... Autolite Spark Plugs. NGK 2771 plugs are 1/4" shorter than AC Delco R44T and a little more than a 1/4" shorter than Autolite 25 series plugs. To increase the plug gap using a simple gap tool, place the end of the ground electrode in the hole and carefully push down on the end of tool. HEAT RANGE CHART Page 3 of 3 NON- PROJECTED TRUCK PLUG PLUGEZ START STAINLESS TRUCK STEEL 14mm .325" Reach 5/8" Hex Tapered Seat HOT COLD 5847 The reach on those is not the explorer's .708. Cold plugs are designed with more contact area, so they transfer more heat away from the tip of the spark plug. 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 Modern-day spark plugs have a long lifespan. These autolite ar 103's are shorter than a conventional plug and a good alternative to the accel shorty plugs. Recommended for vehicles that are driven slower and for shorter distances Fuel Pump Adapters Reducers Adapter. 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