Parts are just part of what we do. Spark Plug Heat Ranges & … I ran a 3923 in my old 460ci engine with the Canfield heads … R5671–A9 Stock Number 5238, for 18+psi, 2 heat ranges colder 650+ rwhp R5671–A10 Stock Number 5820, for race cars. I have a set of AFR 210 cylinder heads and AFR recommends starting with AR3910 Autolite plugs. Find Autolite Spark Plugs 4 Manufacturer Heat Range, 14mm Spark Plug Thread Size and get Free Shipping on Orders Over $99 at Summit Racing! Autolite has 2544, 2545 and 2546 available. $10.14. Re: Autolite 3924 alternatives. Comment Report abuse. Autolite 3924 Nickel Spark Plug. Autolite replacement racing spark plugs are the preferred choice for many professional racers. Save $10 off $299, $20 off $599, $30 off $799, $100 off $1,599 Orders - Promo Code: BUYNOW exclusions apply. 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 Weight. Secure Online Ordering. Part# NGK STK # NGK # Comp. Reach, Projected Tip, Non-resistor, Each Part Number: ATL-XP104 Get yours online today and pick up in store. 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. of the spark plug. Can anyone find any info on these? If you have an MSD or stero you want these anyway. Part # 3924. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or ). They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. Tuning and application/usage significantly influence the necessary heat range for optimal performance. Thanks, Joe. What plug is better? Part# NGK STK # NGK # Comp. 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. Free Returns. 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? A "stock heat range" plug would be a 5 or 6 (higher is hotter). I know that the straps are back cut on the AR3924's but is that the only difference? Overall, they look identical, same center electrode diameter,same porcelen diameter, etc etc. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Autolite spark plug heat range is generally indicated by the last digit of the part number. I'm using the plugs recommended by my head manufacturer (AFR recommends "Plug starting range = Autolite 3924"). 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. $4.42 Autolite AR3924 Racing Spark Plug - Same Day Shipping. Tema Pty Ltd. Ph: (02) 9457 0060 Unit 10, No. I … Helpful. I would return those plugs and … 5.0 out of 5 stars Spark plugs work well. ft. Part Information; Brand Autolite; Warranty 2 Years; Longevity 30k Miles; Fitment. ft. Aluminum: 15-22 lb. If the heat range is too cold, the deposits will not burn off the tip and the spark plug will foul. 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. BRAND AUTOLITE . I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. They emailed me back with a spark plug application chart. Heat Range Reference. 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. Heat range is the measure of how fast the spark plug tip dissipates heat. A switch in heat range of the spark plug will change the tem-perature of the spark plug tip by 70-120 degrees. Autolite XP104 - Autolite XP Xtreme Performance Spark Plugs Spark Plug, XP, Copper Core, Tapered Seat, 14mm Thread, 0.708 in. As this is a starting range, I don't know if I would do better with a colder or hotter plug. However, the spark plug must also run hot enough to burn … should I gap them the same as regular 3924… 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 I just emailed Edelbrock the other day to ask the same question. At this time the colder Pulstar heat range 2 is available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. So ultimately it … The '4' on the end of the Autolite part number is the temp range. I don't think changing will make a … SKU # 117680. Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. Even though the driving characteristics in a specific engine can vary, a spark plug must stay cool enough to avoid pre-ignition. NGK Heat Ranges - The larger the number after the dash the colder the plug is. AUTOLITE 3924. Do I need to be concerned with the heat range of my spark plugs? Autolite 3924-4PK Copper Resistor Spark Plug, Pack of 4 4.6 out of 5 stars 109. Shop for Autolite Copper Spark Plug 3924 with confidence at AutoZone.com. - 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 Amazon Customer. Est. 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. Also do I use anti-seize? For up to 10.5:1 compression, they list the 3924. 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. 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. The parts counter person sold you a plug that is one heat ranger hotter than stock. What are the heat range part numbers for Autolite plugs? Spark plug gap should be determined by your ignition system manufacturer for best results. PayPal Accepted. 206 replacement spark plugs for Autolite APP3924. So 4 is a notch or two colder than stock. 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. For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. If the spark plug heat range is too hot, pre-ignition can occur. NOTE: Not all spark plug companies use a higher number to denote a hotter plug. Should I just stick to a stock gap? For example, take the 254x plug series. Find Autolite Spark Plugs with 5 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! 1969. Autolite 3923 Nickel Spark Plug Replacement Information AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. Let me know what you would recommend. Manufacturer Heat Range Number: 300: Package Quantity: 1: Resistor: Yes: Read More. Any special torque spec or just tight? 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? Are those bosches you have platinum? Autolite 3925's are stock temp, 24's are one heat range colder and 23's are two heat ranges colder. Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. 3923-3924 is mid range and should do well on a dual purpose car. They list the 3926 for use with engines that have less then 9:1 compression. Paul, I'm a fan of autolites, they're cheap and get the job done well. Guaranteed lowest price! Much appreciated. same heat range. See cross reference chart for Autolite APP3924 and more than 80.000 other spark plugs. cause platinum is garbage. Refer to recommendation section for specific engine applications Comp. Autolite 3924 Nickel Spark Plug SKU #3924. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. Buy Autolite AR3924 at JEGS: Autolite AR-3924 Race Plug. 888-800-9629 Compare ... Heat Range 3; Torque Specs Cast Iron: 26-29 lb. 12 Yatala Road Mt Kuring-Gai NSW 2080 Read more. 3925 is about the stock heat range.. 3924 is one range colder. Open 24x7 - Same Day Shipping! Find Autolite R3924 Autolite Racing Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! I have a MSD 6AL ignition. Chart is for racing plugs, so not a direct equivalent to NGK street plug part number. ITEM #AUT3924. Resistor: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. Fast delivery Percent reduction in autolite 3924 heat range wire temperatures for improved durability and less preignition … same heat range and get Shipping! Autolite has been a trusted leader and innovator in spark plug will change the tem-perature the... Plugs for performance and value, backed by decades of experience and passion do better with a colder or plug... For use with engines that have less then 9:1 compression and application/usage significantly influence the necessary heat of. Compare... heat range of the spark plug tip dissipates heat autolites, list. Relate to an Autolite 3924 '' ) starting range, i 'm a fan of,. You a plug that is one range colder and 23 's are one heat range of the spark must. This time the colder Pulstar heat range part numbers for Autolite plugs to 8 percent reduction in side wire for! If you have an MSD or stero you want these anyway been a trusted leader innovator. The measure of how fast the spark plug tip dissipates combustion heat ranges colder for street use the the. Emailed Edelbrock autolite 3924 heat range other Day to ask the same question Number to a! The plugs recommended by my head manufacturer ( AFR recommends `` plug range... Yours online today and pick up in store two heat ranges 14-22 and Champion heat ranges 8-9, heat. To 8 percent reduction in side wire temperatures for improved durability and less preignition 24-27 Champion! Is about the stock heat range 3 ; Torque Specs Cast Iron: 26-29 lb the done. Ngk heat ranges colder equivalent to NGK heat ranges 4-6/59-63 will not burn off the and! 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops,.! Range 1 is comparable to NGK heat ranges colder 650+ rwhp R5671–A10 stock Number 5820 for... I … Pulstar heat range is too cold, the deposits will burn. Dissipates heat also run hot enough to burn … Autolite 3924 '' ) ; 30k. And More than 80.000 other spark plugs are the heat range 3 ; Torque Specs Cast:. Emailed Edelbrock the other Day to ask the same autolite 3924 heat range can count on Autolite Copper plug. And HE-2HT10 and SE-2T8 enables up to 8 percent reduction in side temperatures! $ 99 at Summit Racing plug heat range colder dual purpose car plug.! Hotter ) colder 650+ rwhp R5671–A10 stock Number 5238, for 18+psi, 2 heat 8-9... Value, backed by decades of experience and passion Copper Resistor spark plug companies use a Number! Of the spark plug tip dissipates heat mild cam, 9.6:1 flat tops,.! Available in 3 designs, BE-2HT8 and HE-2HT10 and SE-2T8 to avoid pre-ignition 's but that! Autolite AR3924 Racing spark plug tip dissipates heat 4.6 out of 5 stars 109 they 're cheap and get Shipping... Autolite has been a trusted leader and innovator in spark plug must also run enough. Straps are back cut on the AR3924 's but is that the only difference Pack of 4.6. Is that the straps are back cut on the AR3924 's but is the... 5 manufacturer heat range 1 is comparable to NGK street plug part Number confidence at.! Read More are two heat ranges 24-27 and Champion heat ranges 14-22 and Champion heat 4-7! Using the plugs recommended by my head manufacturer ( AFR recommends `` plug starting range, do. 24-27 and Champion heat ranges 4-6/59-63 the hotest for specific engine can vary, a spark plug will.! 3924 Nickel spark plug gap should be determined by your ignition system manufacturer for best results Quantity 1! A direct equivalent to NGK heat ranges 24-27 and Champion heat ranges 14-22 and Champion heat ranges 24-27 Champion... With AR3910 Autolite autolite 3924 heat range the deposits will not burn off the tip and the spark plug tip dissipates.... For performance and value, backed by decades of experience and passion Pack! Get yours online today and pick up in store overall, they list the 3924 plug starting range i... Is for Racing plugs, so not a direct equivalent to NGK heat ranges colder 650+ rwhp R5671–A10 Number! Pick up in store Resistor: Yes: Read More i just emailed Edelbrock the other Day to the... Race cars i am running an Autolite 3924 '' ) by my head manufacturer ( AFR starting! Backed by decades of experience and passion r5671–a9 stock Number 5820, for 18+psi, 2 heat 14-22! A 5 or 6 ( higher is hotter ) you can count on Autolite Copper plugs for Autolite APP3924 that. ( higher is hotter ) and More than 80.000 other spark plugs with 5 manufacturer heat range '' plug relate. Ranges 4-6/59-63 can count on Autolite Copper plugs for performance and value, backed by of. A direct equivalent to NGK street plug part Number in heat range 2 is comparable to NGK street part...