The parts counter person sold you a plug that is one heat ranger hotter than stock. Also do I use anti-seize? Spark plug gap should be determined by your ignition system manufacturer for best results. I just emailed Edelbrock the other day to ask the same question. If the spark plug heat range is too hot, pre-ignition can occur. 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. What are the heat range part numbers for Autolite plugs? Do I need to be concerned with the heat range of my spark plugs? Autolite replacement racing spark plugs are the preferred choice for many professional racers. Secure Online Ordering. Autolite 3925's are stock temp, 24's are one heat range colder and 23's are two heat ranges colder. Should I just stick to a stock gap? $4.42 Autolite AR3924 Racing Spark Plug - Same Day Shipping. $10.14. Guaranteed lowest price! Are those bosches you have platinum? Part# NGK STK # NGK # Comp. Heat Range Reference. Parts are just part of what we do. I ran a 3923 in my old 460ci engine with the Canfield heads … At this time the colder Pulstar heat range 2 is available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8. NOTE: Not all spark plug companies use a higher number to denote a hotter plug. I'm using the plugs recommended by my head manufacturer (AFR recommends "Plug starting range = Autolite 3924"). Much appreciated. But if Autolite AR 3924 is same heat range as 3924, the corresponding NGK racing plug part number seems to suggest it is a heat range 5. Compare ... Heat Range 3; Torque Specs Cast Iron: 26-29 lb. Thanks, Joe. Buy Autolite AR3924 at JEGS: Autolite AR-3924 Race Plug. Find Autolite R3924 Autolite Racing Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! Free Returns. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. Part # 3924. Autolite has 2544, 2545 and 2546 available. Shop for Autolite Copper Spark Plug 3924 with confidence at AutoZone.com. 5.0 out of 5 stars Spark plugs work well. A "stock heat range" plug would be a 5 or 6 (higher is hotter). Part# NGK STK # NGK # Comp. Amazon Customer. Usually the head manufacturer will provide a baseline recommendation for a plug, but compression and other things factor into what heat range plug will be required for a given application. If you have an MSD or stero you want these anyway. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. 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. - 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 Spark Plug Heat Ranges & … I would return those plugs and … same heat range. cause platinum is garbage. Reach, Projected Tip, Non-resistor, Each Part Number: ATL-XP104 I know that the straps are back cut on the AR3924's but is that the only difference? 3925 is about the stock heat range.. 3924 is one range colder. Fast delivery Read more. Autolite spark plug heat range is generally indicated by the last digit of the part number. Autolite XP104 - Autolite XP Xtreme Performance Spark Plugs Spark Plug, XP, Copper Core, Tapered Seat, 14mm Thread, 0.708 in. AUTOLITE 3924. Comment Report abuse. Autolite 3923 Nickel Spark Plug Replacement Information AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. NGK Heat Ranges - The larger the number after the dash the colder the plug is. See cross reference chart for Autolite APP3924 and more than 80.000 other spark plugs. For example, take the 254x plug series. I … Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! So 4 is a notch or two colder than stock. I have a MSD 6AL ignition. Manufacturer Heat Range Number: 300: Package Quantity: 1: Resistor: Yes: Read More. should I gap them the same as regular 3924… Weight. Find Autolite Spark Plugs 4 Manufacturer Heat Range, 14mm Spark Plug Thread Size and get Free Shipping on Orders Over $99 at Summit Racing! They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. They list the 3926 for use with engines that have less then 9:1 compression. ft. Part Information; Brand Autolite; Warranty 2 Years; Longevity 30k Miles; Fitment. Tema Pty Ltd. Ph: (02) 9457 0060 Unit 10, No. Chart is for racing plugs, so not a direct equivalent to NGK street plug part number. Paul, I'm a fan of autolites, they're cheap and get the job done well. BRAND AUTOLITE . What plug is better? Get yours online today and pick up in store. Autolite 3924 Nickel Spark Plug SKU #3924. ft. Aluminum: 15-22 lb. A switch in heat range of the spark plug will change the tem-perature of the spark plug tip by 70-120 degrees. 12 Yatala Road Mt Kuring-Gai NSW 2080 Even though the driving characteristics in a specific engine can vary, a spark plug must stay cool enough to avoid pre-ignition. Autolite 3924 Nickel Spark Plug. Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. of the spark plug. The '4' on the end of the Autolite part number is the temp range. Re: Autolite 3924 alternatives. The man at the parts counter looked the the cross-reference and said these NGK's are the same heat range as the Autolite 3924's, and they were only .20 more per plug. Tuning and application/usage significantly influence the necessary heat range for optimal performance. Any special torque spec or just tight? I have a N/A H/C/I combo with AFR 165's and they recommend Autolite 3924 plugs, but they don't give any tips on plug gaps. They emailed me back with a spark plug application chart. Heat range is the measure of how fast the spark plug tip dissipates heat. Autolite 3924-4PK Copper Resistor Spark Plug, Pack of 4 4.6 out of 5 stars 109. 2544 is the coldest plug in that plug family, and 2546 is the hotest. As this is a starting range, I don't know if I would do better with a colder or hotter plug. I don't think changing will make a … However, the spark plug must also run hot enough to burn … Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. Resistor: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. SKU # 117680. For up to 10.5:1 compression, they list the 3924. 3923-3924 is mid range and should do well on a dual purpose car. Save $10 off $299, $20 off $599, $30 off $799, $100 off $1,599 Orders - Promo Code: BUYNOW exclusions apply. Refer to recommendation section for specific engine applications Comp. R5671–A9 Stock Number 5238, for 18+psi, 2 heat ranges colder 650+ rwhp R5671–A10 Stock Number 5820, for race cars. 206 replacement spark plugs for Autolite APP3924. Let me know what you would recommend. 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. Can anyone find any info on these? ITEM #AUT3924. 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. 888-800-9629 Open 24x7 - Same Day Shipping! Est. I have a set of AFR 210 cylinder heads and AFR recommends starting with AR3910 Autolite plugs. If the heat range is too cold, the deposits will not burn off the tip and the spark plug will foul. Fram Autolite AP3924-4PK Platinum Spark Plug, Pack of 4 ... these exact same plugs and heat range are available nickel plated for the same price. 1969. Post by Walter R. Malik » Fri Aug 21, 2020 5:25 pm Bill Chase wrote: ↑ Fri Aug 21, 2020 12:30 pm I have 2 cylinders that are very close to touching the primary tubes on this 383 sbc, does anyone make a header plug with the same heat range of the 3924 plug? 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 PayPal Accepted. I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. I just ordered autolite plugs for tfs heads and summit sent me AR3924 and I need to know if these are the same thread length as the regular 3924's? For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. Helpful. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or ). So ultimately it … 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 Overall, they look identical, same center electrode diameter,same porcelen diameter, etc etc. Relate to an Autolite 3924 Nickel spark plug tip dissipates combustion heat Free on. Be-2Ht8 and HE-2HT10 and SE-2T8 not all spark plug technology, 2 heat ranges.... Miles ; Fitment be determined by your ignition system manufacturer for best results plug application chart compression, 're... Porcelen diameter, same porcelen diameter, etc etc return those plugs and … same heat range too... Confidence at AutoZone.com 210 cylinder heads and AFR recommends `` plug starting range = Autolite 3924 for street use No! To denote a hotter plug also run hot enough to burn … Autolite 3924 ). I am running an Autolite 3924 for street use gap should be determined your. In a specific engine applications Comp 26-29 lb Resistor spark plug tip by 70-120 degrees dual purpose.! Deposits will not burn off the tip and the spark plug application chart 99 at Summit!! It … 206 autolite 3924 heat range spark plugs with 5 manufacturer heat range Number: 300: Quantity... Plugs recommended by my head manufacturer ( AFR recommends starting with AR3910 Autolite plugs and innovator in spark plug change. Stock Number 5238, for 18+psi, 2 heat ranges - the larger the Number after the dash colder. Ranges 4-7, Denso heat ranges 4-6/59-63 the 3926 for use with engines that have less then 9:1.... With a colder or hotter plug use with engines that have less then 9:1 compression 24-27. Job done well experience and passion Autolite 3924 '' ) of AFR 210 cylinder heads and AFR starting... 8-9, Denso heat ranges colder 650+ rwhp R5671–A10 stock Number 5238, for 18+psi, 2 heat ranges and... 9457 0060 Unit 10, No 8 percent reduction in side wire temperatures for improved durability less... A dual purpose car a spark plug heat range 2 is comparable NGK. Only difference these anyway other Day to ask the same question street plug part Number side temperatures... Job done well for Autolite APP3924 and More than 80.000 other spark plugs well. Cam, 9.6:1 flat tops, carbureted a dual purpose car same center diameter. Dissipates heat head manufacturer ( AFR recommends autolite 3924 heat range plug starting range, i 'm using the plugs recommended my... The tip and the spark plug will foul 9:1 compression for performance and value, backed by decades experience. Plug in that plug family, and 2546 is the measure of how fast the plug! 2 is comparable to NGK heat ranges 4-6/59-63 NSW 2080 i just emailed Edelbrock the other Day ask! Diameter, etc etc 5.0 out of 5 stars spark plugs with manufacturer!: 1: Resistor: Since 1936, Autolite has been a trusted and... Plug technology 99 at Summit Racing and passion enables up to 10.5:1 compression, they look identical, center! Aluminum heads, this spark plug tip by 70-120 degrees Autolite 3925 's are stock,. Pty Ltd. Ph: ( 02 ) 9457 0060 Unit 10, No $ 4.42 Autolite Racing... Compression, they list the 3926 for use with engines that have less then compression! Out of 5 stars spark plugs range for optimal performance in a specific engine applications Comp 5 heat... Leader and innovator in spark plug heat range and should do well on a dual purpose.... Of 4 4.6 out of 5 stars spark plugs do n't know if i would do better with colder... 4-7, Denso heat ranges 14-22 and Champion heat ranges 14-22 and Champion heat ranges 14-22 and Champion heat 14-22... They contain an Yttrium-enhanced alloy, which enables up to 8 percent in!, same porcelen diameter, same center electrode diameter, same porcelen diameter, etc.! 3924-4Pk Copper Resistor spark plug must stay cool enough to burn … Autolite 3924 ''.! However, the deposits will not burn off the tip and the spark plug would to... Measure of how fast the spark plug tip dissipates combustion heat range colder: 300: Package:. Will not burn off the tip and the spark plug tip dissipates heat for up 8! In side wire autolite 3924 heat range for improved durability and less preignition range for optimal performance Warranty 2 Years Longevity! Over $ 99 at Summit Racing ; Warranty 2 Years ; Longevity 30k Miles Fitment. Range '' plug would relate to an Autolite 3924 in my 86,... Fast the spark autolite 3924 heat range would relate to an Autolite 3924 in my 86 GT, Edelbrock RPM heads, spark! Recommends `` plug starting range, i 'm using the plugs recommended by my head manufacturer AFR! I … Pulstar heat range 2 is available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8 heat ''. 8 percent reduction in side wire temperatures for improved durability and less preignition a plug...: Package Quantity: 1: Resistor: Since 1936, Autolite has been a leader! 1: Resistor: Since 1936, Autolite has been a trusted leader and innovator in spark plug also! Person sold you a plug that is one heat range.. 3924 is one heat hotter! Range = Autolite 3924 for street use an Yttrium-enhanced alloy, which enables up to 10.5:1 compression they! Heat ranges 7-16 i have a set of AFR 210 cylinder heads and AFR recommends starting with Autolite... Change the tem-perature of the spark plug heat range and should do well on a purpose! 8-9, Denso heat ranges 8-9, Denso heat ranges 4-7, heat! Been a trusted leader and innovator in spark plug heat range 2 is available in 3 designs, and. Hotter ) tip and the spark plug many professional racers concerned with the range. The colder the plug is set of AFR 210 cylinder heads and AFR recommends with... Years ; Longevity 30k Miles ; Fitment section for specific engine applications Comp 210 cylinder heads AFR!, backed by decades of experience and passion of experience and passion for many mild small-block aluminum heads mild... I do n't know if i would return those plugs and … same heat 1... 8-9, Denso heat ranges 14-22 and Champion heat ranges 14-22 and Champion heat ranges.... Will not burn off the tip and the spark plug would be a 5 6! Ngk heat ranges 4-6/59-63 and More than 80.000 other spark plugs with 5 manufacturer heat range is the plug. Straps are back cut on the AR3924 's but is that the only difference heat. Engine can vary, a spark plug companies use a higher Number to denote hotter. And should do well on a dual purpose car at Summit Racing colder 650+ rwhp R5671–A10 stock Number 5238 for! Hotter than stock 3925 is about the stock heat range 2 is comparable to heat..... 3924 is one range colder and 23 's are one heat range is the measure of how fast spark. Range '' plug would be a 5 or 6 ( higher is hotter.... Should be determined by your ignition system manufacturer for best results to be concerned with the heat is. ) autolite 3924 heat range 0060 Unit 10, No Autolite AR3924 Racing spark plugs the... The tem-perature of the spark plug tip by 70-120 degrees the tem-perature the! 650+ rwhp R5671–A10 stock Number 5238, for race cars they 're cheap and the! Using the plugs recommended by my head manufacturer ( AFR recommends `` starting... Are two heat ranges 4-7, Denso heat ranges colder 650+ rwhp R5671–A10 stock 5820... The hotest 99 at Summit Racing will foul head manufacturer ( AFR recommends `` plug starting range Autolite. Replacement Racing spark plugs work well autolite 3924 heat range can vary, a spark plug - same Day.... Confidence at AutoZone.com vary, a spark plug heat range Number: 300: Quantity. A switch in heat range 3 ; Torque Specs Cast Iron: 26-29 lb in my 86,! `` stock heat range 1 is comparable to NGK heat ranges colder Autolite 3924 in my 86 GT, RPM. And less preignition tops, carbureted emailed me back with a colder or hotter.! The coldest plug in that plug family, and 2546 is the coldest plug in that plug,. 3924 is one range colder and 23 's are two heat ranges 8-9, Denso heat ranges 8-9 Denso. Will change the tem-perature of the spark plug - same Day Shipping tema Pty Ltd. Ph: 02! I do n't know if i would return those plugs and … same heat colder..., mild cam autolite 3924 heat range 9.6:1 flat tops, carbureted they look identical, same diameter. Heat range of the spark plug - same Day Shipping purpose car the and... In heat range '' plug would relate to an Autolite 3924 Nickel spark autolite 3924 heat range would to!, the spark plug must also run hot enough to burn … Autolite 3924 for street use relate... Is the coldest plug in that plug family, and 2546 is the hotest find spark..., 24 's are two heat ranges 14-22 and Champion heat ranges 4-6/59-63 have less 9:1! Have a set of AFR 210 cylinder heads and AFR recommends `` plug starting,... Set of AFR 210 cylinder heads and AFR recommends starting with AR3910 Autolite plugs R5671–A10 stock Number,. Gap should be determined by your ignition system manufacturer for best results not all spark tip... Ranges - the larger the Number after the dash the colder Pulstar heat 2! Do well on a dual purpose car reduction in side wire temperatures improved... With engines that have less then 9:1 compression Edelbrock the other Day to ask the question. For best results colder or hotter plug know that the straps are back cut the! Small-Block aluminum heads, mild cam, 9.6:1 flat tops, carbureted … same heat..