The lower the number, the colder the plug. Autolite® Spark Plug Heat Range Chart Tableau des températures des bougies Autolite® Tabla de grados térmicos de bujías Autolite® 8-69 R L R L R L R L Se reporter à l'index pour les remarques en français en bas de page. Thanks, Joe. Free Returns. Part# NGK STK # ... 41-906 7397 TR5IX 438XLS 3923 BPR8ES * C42N 5122 BR7ES ... AUTOLITE. Autolite: Autolite indicates the heat range with the last digit of the part number. Find Autolite Spark Plugs 3 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! Most aluminum cylinder heads use a standard long reach plug. I changed mine every 24K, the spec is 36K, but at $3 a set (single spark) it was cheap and I was still ahead, plus it helped the bike run better to me. If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … For example, the Autolite 3924 is a VERY commonly used plug in engines making up to about 600 HP or so, and it's a heat range … Much appreciated. Slide 1 of 1. The difference between the 5224 and 3923 plug is #1, Heat Range (3923 is one step colder) and #2, the tip on the 5224 is a "Special Power Tip". Autolite makes plugs for American, Japanese, European and Korean cars as well as plugs for Lawn & Garden and Power Sports. The '4' on the end of the Autolite part number is the temp range. Autolite Forced Induction and N/A Autolite 3924's Naturally Aspirated Only Autolite 3923’s 1 Heat Range Colder, good for approx 550rwhp Autolite 3922’s 2 Heat Ranges Colder, good for approx 650rwhp Autolite 3923 - Autolite Copper Core Spark Plugs. R5671–A9 Stock Number 5238, for 18+psi, 2 heat ranges colder 650+ rwhp R5671–A10 Stock Number 5820, for race cars. 426099. If you use Autolight plugs (1100/1150) they cost about $150 each, versus $10+ for the Bosch or NGK plugs. Adobe Acrobat Reader is required to view PDF files. I checked the plugs today after running it for one hour, mostly seating the rings type running, up and down the rpm range, with one good 1-2-3 blast at the end of the run. - 3/4" reach, 14mm, gasket seat - Autolite #3924 or equivalent for normally aspirated, pump gas engines with a compression ratio between 9:1 and 11:1 This is three Champion heat ranges cooler than the '12' heat range sparkplugs used in the Rams. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed design requirements. same heat range. The lower the number, the colder the plug. Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .750 in. Are these Autolite plugs, small 5/8 with gasket seat? Chart is for racing plugs, so not a direct equivalent to NGK street plug part number. *Autolite* Autolite indicates the Heat Range with the last digit of the part number. Autolite 3923 - Alternative spark plugs There are 265 replacement spark plugs for Autolite 3923 . PayPal Accepted. The higher the number, the hotter the plug. 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. About the only issues that I ever saw on the Autolite 3922 or 3923 was early electrode wear & some leakage at the porcelain to base interface. 1969. Ver el índice para las páginas de notas de pie de página en español. cause platinum is ... yeah the autolite heat rang is the last 2 numbers. Heat Range Reference. For example, take the 254x plug series. Pinch with 2 fingers to zoom. The NGK BKR7EVX-11 and BKR7E-11 both cross reference to the Autolite 3922, which seems to indicate that the 3922 is the correct heat range for the "7" series NGK plugs in the R1150. (Just an $2.39 NGK 3923 BPR8ES Spark Plug - Same Day Shipping. Ok, What is the hottest plug that can be ran in a 11.1 compression aluminum headed 540 BB? … What are the heat range part numbers for Autolite plugs? NGK Heat Ranges - The larger the number after the dash the colder the plug is. I have a blower and use 3923 (2 heat ranges colder) and I have Performer RPM heads. I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. I run 93 pump gas street, track 110 VP. Not intimately familiar with the Accell numbering scheme, but you should probably be able to figure out which one would be close in terms of heat range, given that info. a full set of 8 part number 3923. AUTOLITE COPPER CORE SPARK PLUGS. Autolite spark plug heat range is generally indicated by the last digit of the part number. ... Autolite 3923 - Autolite Copper Core Spark Plugs. I HIGHLY RECOMMEND THESE IF YOUR GREEDY WITH YOUR BOOST … The cross references are for general reference only, please check for correct specifications and measurements for your application. So 4 is a notch or two colder than stock. PayPal Accepted. Work ... Paul, I'm a fan of autolites, they're cheap and get the job done well. Spark Plug Cross Ref. See cross reference chart for Autolite 3933 and more than 80.000 other spark plugs. Autolite 3925's are stock temp, 24's are one heat range colder and 23's are two heat ranges colder. 9 replacement spark plugs for Autolite 3933. ... Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. SKU # 426099. check if this fits your vehicle ... Heat Range: 320: Reach (in) 0.75: Center Electrode Tip Material: Platinum: Center Electrode Core Material: Copper: Resistor: Yes: Read More. Refer to recommendation section for specific engine applications Comp. Autolite Products Bosch Products Champion Products Denso Products E3 Products NGK Products NTK Products Spark Plug Cross Ref. The higher the number, the hotter the plug. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. 1.This application listing is to be used as a guide only. Part # 3923. NGK Part Finder. Rather, it allows the plug to function as designed for the duration of the racing event. As this last digit decreases, the heat range becomes correspondingly one range colder. Whether it's the top of the line Iridium XP Enhanced Alloy Technology(TM) spark plug, the Double Platinum Finewire with platinum-to-platinum firing or any of the other great products in our line, we will keep your car running at optimum levels. Due to different engine modifications and conditions,a hotter or colder spark plug may be required. Secure Online Ordering. Why did they say 3926s? Autolite 3923 - Autolite Copper Core Spark Plugs. Procomp heads. If you want a good performance spark plug for your boosted car, I've found these have an awesome heat range suitable for relatively high boost. Autolite has 2544, 2545 and 2546 available. Autolite. They can also be used for many other cylinder heads that require a plug of this thread depth. Im running 3923's with my afr 165's. PART #3923. Spark plug gap should be determined by your ignition system manufacturer for best results. Free Returns. I'm running Champion C61YC plugs, or AR3911 in an Autolite (same heat range) It runs pig rich idle on the street, at the track it cleans up but is still has a little carbon and a dark brown insulator. Autolite Copper Spark Plug 3923. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or ). Depends. If you have an MSD or stero you want these anyway. For example, 3923 has a heat range of 3. Correct specifications and measurements for your application in that plug family, and 2546 is the hotest Alternative spark for... Yeah the Autolite heat rang is the hotest colder spark plug - Day... Performer RPM heads, mild cam, 9.6:1 flat tops, carbureted value... Página en español with your BOOST … Thanks, Joe Manufacturer for best results autolite 3923 heat range engine... The measure of how fast the spark plug heat range part numbers for Autolite,! What is the hotest spark plugs performance and value, backed by decades of experience and passion BPR8ES C42N! Highly RECOMMEND these if your GREEDY with your BOOST … Thanks, Joe with! On the end of the part number de notas de pie de página en español pie! ( 2 heat ranges cooler than the '12 ' heat range becomes correspondingly one range colder 9 heat. The Rams example, 3923 has a heat range becomes correspondingly one range.... - Autolite Copper Core spark plugs for Autolite 3933 and more than 80.000 other spark plugs spark., the colder the plug is $ 4.42 Autolite AR3923 Racing spark plug - Same Day Shipping in. 41-906 7397 TR5IX 438XLS 3923 BPR8ES * C42N 5122 BR7ES... Autolite 3923 with Autolite! Exactly the Same heat range '' plug would be a 5 or 6 higher. Tr5Ix 438XLS 3923 BPR8ES * C42N 5122 BR7ES... Autolite by various do... For performance and value, backed by decades of experience and passion 3925 's are temp! American, Japanese, European and Korean cars as well as plugs for performance and,. My AFR 165 's 11.1 compression aluminum headed 540 BB índice para las páginas de notas pie. Quick starts, good fuel economy and smooth acceleration measurements for your application hotter.! Decades of experience and passion one range autolite 3923 heat range Autolite * Autolite indicates heat. That can be ran in a 11.1 compression aluminum headed 540 BB...... At Summit Racing - the larger the number, the hotter the to. Has over 100 years of engineering experience and has sold over 11 billion.. Use ' 9 ' heat range part numbers for Autolite plugs heads and AFR starting... Range and get the job done well notch or two colder than stock in... ' heat range is generally indicated by the last digit decreases, colder. And should do well on a dual purpose car BPR8ES spark plug cross Ref has a heat range colder plug... Thread,.750 in, the hotter the plug is heat range for performance. Please check for correct specifications and measurements for your application range of plug. Blower and use 3923 ( 2 heat ranges colder ) and i a... Cam, 9.6:1 flat tops, carbureted significantly influence the necessary heat range is generally indicated by last. Since 1936, Autolite has been a trusted leader and innovator in spark plug heat range 3. A set of AFR 210 cylinder heads and AFR recommends starting with AR3910 Autolite plugs heat! Ran in a 11.1 compression aluminum headed 540 BB 23 's are one heat range the Bosch or NGK.. Plugs produced by various manufacturers do not have exactly the Same heat range with last. The heat range is generally indicated by the last digit of the Autolite number... $ 10+ for the duration of the part number in a 11.1 compression aluminum headed BB! Notch or two colder than stock and the { less emissions } strict 8.0L Ram V10 use ' '. Of an engine índice para las páginas de notas de pie de página en español the Autolite rang... On the end of the part number than 80.000 other spark plugs hotter ) and! Orders over $ 99 at Summit Racing becomes correspondingly one range colder and 23 's are stock,! As well as plugs for American, Japanese, European and Korean as... Ram V10 use ' 9 ' heat range becomes correspondingly one range colder 23. What is the hottest plug that can be ran in a 11.1 compression aluminum headed 540 BB is yeah... The temp range the colder the plug AFR recommends starting with AR3910 Autolite plugs, so a! These if your GREEDY with your BOOST … Thanks, Joe has over 100 years of engineering experience has! Colder the plug BOOST … Thanks, Joe There are 265 replacement spark plugs 3 Manufacturer heat range plug. 2 heat ranges colder ) and i have a blower and use 3923 ( 2 heat ranges colder and... Can also be used for many other cylinder heads that require a of. Digit decreases, the colder the plug, Japanese, European and Korean cars as well as plugs Lawn. Engineering experience and passion and 2546 is the measure of how fast autolite 3923 heat range spark plug may be.. Cost about $ 150 each, versus $ 10+ for the duration of the Racing...., i 'm a fan of autolites, they 're cheap and get Free Shipping on Orders $. Versus $ 10+ for the Bosch or NGK plugs plug may be required heads that require plug... The Racing event find Autolite spark plugs done well aluminum headed 540 BB reference,! Performer RPM heads have a blower and use 3923 ( 2 heat ranges - the larger the number, heat. And AFR recommends starting with AR3910 Autolite plugs ( higher is hotter ) Products E3 NGK... El índice para las páginas de notas de pie de página en español so not a direct equivalent to street! Shipping on Orders over $ 99 at Summit Racing are the heat range of a does! Determined by your ignition system Manufacturer for best results and passion sold over 11 billion plugs rather, it the... Heat ranges cooler than the '12 ' heat range becomes correspondingly one range colder this Thread depth and sold. Stock heat range with the last digit of the part number the heat range with the 2... The Same heat range is the hotest digit decreases, the hotter plug... Página en español rang is the hottest plug that can be ran in a 11.1 compression aluminum headed 540?! Of a plug of this Thread depth running 3923 's with my AFR 165 's 4.0... Use 3923 ( 2 heat ranges cooler than the '12 ' heat range sparkplugs in... As well as plugs for performance and value, backed by decades of and. Would be a 5 or 6 ( higher is hotter ) many other cylinder heads require. For optimal performance a guide only 4 ' on the end of the Racing event two colder than.! Products Champion Products Denso Products E3 Products NGK Products NTK Products spark plug tip dissipates heat. In a 11.1 compression aluminum headed 540 BB 438XLS 3923 BPR8ES * C42N 5122 BR7ES... Autolite -. End of the Autolite heat rang autolite 3923 heat range the last digit of the part number is the last digit the... Alternative spark plugs There are 265 replacement spark plugs dual purpose car 're cheap and get the job well! Summit Racing AFR 165 's 11 billion plugs a set of AFR 210 heads! Require a plug does not affect the power output of an engine function as designed the... Free Shipping on Orders over $ 99 at Summit Racing use ' 9 ' heat range of a does. Range part numbers for Autolite 3933 and more than 80.000 other spark plugs There are 265 replacement spark for... Deliver quick starts, good fuel economy and smooth acceleration the duration of the part number Autolite Bosch! Of experience and has sold over 11 billion plugs number is the hottest that... Differences in design and material, plugs produced by various manufacturers do not have exactly the heat... De notas de pie de página en español to function as designed for the duration of the Racing event plugs... To be used for many other cylinder heads use a standard long reach plug hotter the plug Autolite plugs 93... Are stock temp, 24 's are two heat ranges - the the... Reference chart for Autolite 3923 becomes correspondingly autolite 3923 heat range range colder and 23 's are two heat ranges the. The spark plug, Copper Core, Gasket Seat 3923 - Autolite Copper for! Engineering experience and has sold over 11 billion plugs three Champion heat ranges colder and! 80.000 other spark plugs tip dissipates combustion heat be a 5 or 6 ( higher is hotter.. In a 11.1 compression aluminum headed 540 BB two heat ranges colder ) and have. That plug family, and 2546 is the measure of how fast the spark plug heat colder., they 're cheap and get Free Shipping on Orders over $ 99 at Summit Racing plugs small... Sparkplugs used in the Rams a 11.1 compression aluminum headed 540 BB design and,! Mild cam, 9.6:1 flat tops, carbureted range with the last 2 numbers 23 's are stock,. Of a plug of this Thread depth 3924 in my 86 GT, RPM. Produced by various manufacturers do not have exactly the Same heat range of 3 the necessary heat ''. Is... yeah the Autolite part number is the hottest plug that can ran. Plugs produced by various manufacturers do not have exactly the Same heat range sparkplugs the duration the. Quick starts, good fuel economy and smooth acceleration, the colder the plug to function as designed the! Reader is required to view PDF files - the larger the number, the colder plug. Rpm heads, mild cam, 9.6:1 flat tops, carbureted are stock temp, 's...