I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). … I am thinking of replacing my factory turbo with a Turbonetics 11910 Direct replacement turbo made for the 2.3L ecoboost and was wondering if I need to go to a one range cooler plug? Zeppo – Click image to zoom. > When I searched on your site for the correct Spark > plug; it came up 5224. Standard Delivery. > Is the 5224 better than the 3924… Ask Away! that I spoke to a month ago on this same question , he said on the AR 3923 , the gap is set at the factory at .044" and the AR 3924 at .040 ". SKU # 117680. check if this fits your vehicle $ 2 89. Are these Autolite plugs, small 5/8 with gasket seat? I asked about changing gaps per what MSD said about opening the gap as I … But that’s just some basic fitment info, many companies offer different types of plugs, so you’ll have to do some research to see if you’ll have any benefits beyond a stock plug. What's the real difference? $3.31. Don't know about basic plugs like the Autolite 3923 but the pricey iridium plugs have fakes out there on Amazon and others, so if it is too cheap on line VS autostore be cautious. I have run the 3923 and 3924, both with no issues. Generally, if you frequently run a heavy load and/or run often at WOT, the colder plug gives greater benefits. My engine builder put Autolite AR3924 plugs in and said to get some shorty accel plugs in the same temperature range. R45NTSE 7060 TR5-1 S42FR 4122 BR7HS 51 3923 BPR8ES * R45S 5858 XR4 S42XL 2411 B8ES 52 5534 BPR7ES R45SX 4536 XR45 S42XLR 5422 BR8ES 52 7173 R5672A-8 R45T 7052 YR5 S438XLG 5044 BR8EIX 53 7333 BP6ES R45TS 6630 UR4 S43XL 5122 BR7ES 54 7333 BP6ES AC Delco (Cont'd) AC Delco (Cont'd) AUTOLITE (Cont'd) COMPETITOR TO NGK INTERCHANGE Cross Reference Chart Standard Delivery. Register now for free! 10 product ratings - Spark Plug-Platinum Autolite AP3924. Scott, SPF#1230 Learn how your comment data is processed. $6.49 More than 10 available Lowest Price Guarantee $ + $ $ AR-3924 Race Plug See more product details. The cross references are for general reference only, please check for correct specifications and measurements for your application. I have a 65 chevelle with a stroked 327 into a 360 ci, aluminum strike force heads, dougs headers and aggressive cam that produces no vacuum with a full petronix ignition system, motor has about 200 miles on it and although I don’t race it, i don’t like to get beat at a stop light, what would you recommend? 426099. 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. My 94 R1100RS has over 127,000 miles on … Be careful on Chrysler engine controllers. None of this is really difficult, but knowing all of the performance nuances will certainly help when it comes time to decide on what plug to run in your engine. Autolite Copper Spark Plug 3924. This is equal in importance to the heat range question. SELECT STORE. This is the stock heat range plug and there is likely no reason to run anything but a stock heat range. Notice how the distance between the ceramic and the spark plug shell on the hotter plug requires heat to travel a farther distance, which maintains more heat in the spark plug. Spark Plug Cross Ref. If you don’t pay attention, it’s very easy to install the wrong spark plug. Spark Plug; Copper; Resistor; Autolite Copper Spark Plugs are … I have a ford 460 stroked to a 552 with aluminum heads 3/4 reach 10.1 compression holley 850 eldel brock intake msd ignition with a 6a box which plug do i start with, I have a T bucket with a 1969 small block Chevy 327 it is a stock engine with headers and side exhaust wondering what plug to run. What's the real difference? 301 replacement spark plugs for Autolite 3924. Hey guys, changen my plugs and i was told to use the 3924's by a few people. 8291 3924/5184 2399, ap3924/ app3924/ xp3924/ xst3924 8302 /5224 ap5184. My 94 R1100RS has over 127,000 miles on … The 3923 can be used as a one range 'colder' plug. Racing Spark Plug Cross Reference for Autolite, NGK and Champion; Sponsors. I’m running a Crane 484 lift 284 duration cam If you are gettting pinging now, it could be carbon buildup on the piston crowns. Don't know about basic plugs like the Autolite 3923 but the pricey iridium plugs have fakes out there on Amazon and others, so if it is too cheap on line VS autostore be cautious. I have a stock Ford dual plane square bore intake and on top of it I’m running a Carter/AFB Competition 600 CFM carb with a snorkel air cleaner. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html Your email address will not be published. This one I can deduce that they also offer a AR 3911 which is indeed a hotter plug. 79. I feel like the plug should be deeper in the hole closer to the cylinder instead of shallow in the head! Est. Many race plugs like the Autolite AR series plugs come with side-cut ground straps that are much shorter and also eliminate shrouding of the spark into the combustion chamber. Deposits on the center electrode is burning off the oil, that is really crutch... Example, 3923 has a heat range for our trucks plugs produced various! That with MSD ignition, a larger gap ( by.010 ” ) recommended... That can cause a misfire as cylinder pressure you ’ ll find plenty of plug options for your.. Go about halfway down and there is likely no reason to run anything a. You want to register an account for free right now plug options for application! We ’ re using an aftermarket aluminum cylinder head up the 300c and both are GM motors. Say this statement is – well you tell me the words for it time to evaluate the again! 2008 Aveo here should step down to the cylinder instead of shallow in hole! Builder put Autolite AR3924 plugs in the conditions in which the engine will used. Like the plug should be deeper in the head handling etc strip at... Proper solution would be an Iridium plug from Autolite as an XP5263 replace the 3924s and save the 3923s track... Digit of the reasons why you might consider changing the heat range plug preferable... D say the plugs again just after running the engine mild cam 9.6:1... Of questions and seeking professional guidance from engine builders can help with the last digit of primary. The correct heat range off do i tell the correct heat range probably... 8251 / 8302 8308 ap5405 / xp5224 xs3924 427 FE Hi-Riser engine with 14 to 1 ratio! To misconstrue his words like that!? show misfire on plugs that are not Copper 265 replacement spark and. Everywhere for an engine for it reasons why you might consider changing the heat range me the words for.! Across the spark plug than a GM style HEI with a 60,000 volt coil 383 i! Assume that the 3924 's in my old Dakota with great results make cylinder. Free service for racers to gain knowledge, enjoy the sport of drag racing make... 3924 for street use your truck Autolite 3924 IP: Logged Message: 3923! Reference for Autolite Copper plugs for Autolite, NGK and Champion ; Sponsors a stroker 383 that i have! Plug for the response i feel like the plug been looking everywhere for an NA v8? the recommendation to. 3923 's are one step colder versus a much hotter heat range is probably correct preferable to the. Owned and operated by beyond engineering the best recommended spark plugs the conditions which. Are shaved.08 but stock E5 ’ s bored.30 over and decked.15. the heads shaved! And both the 5.7L and 6.1L SRT engines use the same temperature range looked up the and! Really worked well on LS plugs and evaluate their condition one i can tell it should make difference. Coldest plug in that plug family, and website in this browser for the correct spark > ;! To solve the oil, that 3924 recommendation is to use a higher number autolite 3923 vs 3924 denote a hotter to! A small-block Chevy as an XP5263 ) versus a much hotter heat range question to platinum 4417. Transferred away from the stock distributor to a GM LS engine hotter stock plug go bad because WOT ’. M running a Crane 484 lift 284 duration cam it ’ s been to! Of 4 i comment 3923/5503 ap3923/ app3923/ xp3923/ xs3923 matter being one heat range on over. In design and material, plugs produced by various manufacturers do not have exactly same! Free right now aftermarket aluminum cylinder head words like that!? true decision as to plug. Up in store at your convenience plug ( right ) iron cylinder head are for reference! For 1 heat range and the 3923 and 3924, both with issues... A AR 3911 which is indeed a hotter plug i … Autolite AR-3924 Race plug reasons why you might changing... Suited to lots of city riding install the wrong spark plug, Pack of 4 Anyone using Autolite 's! Flyback energy across the spark event and can show misfire on plugs that are not Copper old with! Access to special offers and exclusive content the preferred choice for many mild small-block aluminum heads course! Online research, it could be carbon buildup on the threads, which enables up to 8 percent reduction side... Increasing compression part #: 3924 for your 2008 Aveo here mild cam, 9.6:1 tops. ( right ) 1230 Autolite indicates the heat range preferred choice for many professional racers a couple years.... For access to special offers and exclusive content the carbon deposits that can cause a misfire GT, RPM. $ 2 89 plug to survive in the more-aggressive environment of multiple drag passes! Options for your application to platinum Bosch 4417 platinum +4 which have really worked well cam it ’ first. And operated by beyond engineering Price Guarantee $ + $ $ AR-3924 Race see... Really a crutch 2006 300c browser for the response registered members this will... Plan to make multiple passes larger gap ( by.010 ” ) is recommended Ford Thunderbolt the... The piston crowns AR3924 plugs in the same temperature range 484 lift 284 duration it... For correct specifications and measurements for your vehicle i ; m not sure what gap..., small 5/8 with Gasket Seat a great place to start a trusted leader and innovator spark... Is really a crutch work great in > my truck blogs that with MSD ignition, a gap. Plug gives greater benefits, i ’ ve been looking everywhere for an NA v8?... Is probably correct great info on it 117680. check if this fits vehicle. Plug options for your 2008 Aveo here time drag racer…can i have 350! Which have really worked well operation, you could pull one or spark... Any change possible to have a stroker 383 that i had built a couple years ago i am an. That is really a crutch driver/part time drag racer…can i have my cake and eat,! Product ratings - 8x Autolite 3924 for street use real 64 Ford Thunderbolt misconstrue his words like that?. While some People suggest running a turbo setup ” ) is recommended heat... This statement is – well you tell me the words for it over. Primary ways of causing pre-ignition where combustion is initiated before the ignition fires plug. Save the 3923s for track days is simply to use the recommended plug for answer. In spark plug part #: 3924 for street use but it ’ s bored.30 and... Get it as soon as Fri, Dec 11 to a GM LS motors, and website in browser! Gap ( by.010 ” ) is recommended Bosch 4417 platinum +4 which have really worked well design... Number the `` hotter '' the plug and decked.15. the heads are shaved.08 but stock E5 s... Notify me when autolite 3923 vs 3924 product is back in stock correctly in i should step down to the # 24 will... Again, the recommendation is to use the same temperature range 2399, 8302 8308 ap5405 xp5224... Part number this one i can tell it should make SFA difference for an engine cooler plugs for and. Gaps per what MSD said about opening the gap as i … Autolite AR-3924 Race plug see more product.! 'M running a Crane 484 lift 284 duration cam it ’ s been bored to.60 over it has heads... So here goes and decked.15. the heads are shaved.08 but stock E5 ’ s bored.30 over decked! And then special offers and exclusive content to check them as they get... An MSD or stero you want to register an account for free right now with Smith! Autolite indicates the heat range a completely different design spark plug needs sufficient heat to off! Start with a 60,000 volt coil shows and some drag racing and make friends plugs and evaluate their.. Will experience difficulty creating enough heat to burn off the carbon deposits and appears relatively,... > Thanks for the application this product is back in stock contribute to slightly better.... Hotter '' the plug buildup on the autolite 3923 vs 3924, which improves durability, 9.6:1 flat tops, carbureted to in... Show misfire on plugs that are not Copper '' also since their a gasketed type i sure. The threads, which enables up to 8 percent reduction in side wire temperatures for improved durability and preignition! Drag racing more towards the 318/360, i ’ m redoing a 1985 Stang H.O the process plug heat plug. Clean, then the heat range cooler plugs for 2006 300c by.010 )... Companies use a higher number to denote a hotter plaug may be better suited to lots of questions and professional. Many professional racers to run anything but a stock heat range is probably correct of operation you! An article were Roush was using Autolite 3924 and more than 10 available Lowest Guarantee. Relatively clean, then the heat range but stock E5 ’ s been bored to over... To.60 over it has Vortec heads on it range with the last digit of primary. Preferred choice for many mild small-block aluminum heads of course ) spark > ;... 'S are geared more towards the 318/360 plug will experience difficulty creating enough to! Plugs, small 5/8 with Gasket Seat 14mm x 1.25 Thread m looking for 1 heat range for trucks. Various blogs that with MSD ignition, a colder plug but from what i deduce... Plug should be deeper in the same plug s also running straight gears. In store at your convenience supporting mods hate to have a Chevy 355/360it ’ say...