https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html But does it matter? I’m running a Crane 484 lift 284 duration cam Here are some of the reasons why you might consider changing the heat range of the plug. Autolite. My 94 R1100RS has over 127,000 miles on … > Subject: Autolite Copper VS. Autolite Copper Spark Plug 3923. But from what I can tell it should make SFA difference for an NA v8?? Slide 1 of 1. Sorry last link pasted wrong. https://sites.google.com/site/sloppywiki/everything-ls/spark-plugs. Delivery: Dec 31-Jan 01. REAL ALUE. Home Delivery. Finally, I’ve read in various blogs that with MSD ignition, a larger gap (by .010”) is recommended. 426099. Visit our site for coupons and promotions. A hotter heat range plug is preferable for engines that only see light duty applications as in mild street driving. 4.4 out of 5 stars 99. As long as the center electrode is burning off the carbon deposits and appears relatively clean, then the heat range is probably correct. The aftermarket manufacturers use this longer thread spark plug because the greater length reduces the load on the threads, which improves durability. So for a normal, street-driven engine, that 3924 recommendation is a great place to start. Asking lots of questions and seeking professional guidance from engine builders can help with the process. … Look at other auto stores and you will see some list the 5224 and some the 3924 If you are getting some ping deffinetly try the 23's Required fields are marked *. 10 product ratings - Spark Plug-Platinum Autolite AP3924. If this occurs too soon with the piston travelling upward, catastrophic cylinder pressure is created that will near-instantly destroy a piston or otherwise seriously damage the piston and/or connecting rod. Find Autolite R3924 Autolite Racing Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! Buy It Now. Am I thinking correctly in I should step down to the #24? 36. Autolite Copper Spark Plug 3923. (One level colder...) It's a BMW M62 and plugs are about 30k old from service records and look like the Your email address will not be published. SELECT STORE. Get product details, choose a store, and get directions. Any assistance would be much appreciated! This is a first for me and a site like so here goes. Zeppo – Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. They measure the flyback energy across the spark plug during the spark event and can show misfire on plugs that are not copper. For a stock engine, the answer is simply to use the recommended plug for the application. If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … SKU # 117680. check if this fits your vehicle $ 2 89. Autolite recommends the 3924 for these heads, but I’ve read in various blogs that with the MSD ignition, the colder 3923 is a better choice?? Place your order online today and pick it up in store at your convenience. Pinch with 2 fingers to zoom. Delivery: Dec 31-Jan 01. The key to a heat range selection is related to selecting a plug that will efficiently burn-off carbon deposits from the center ceramic during normal use of the engine. They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. > People have said that the 3924 or 3923 work great in > my truck. .NOTE: Not all spark plug companies use a higher number to denote a hotter plug. Autolite Copper Spark Plug 3924. This is great news. I’m building a Ford 427 FE Hi-Riser engine with 14 to 1 compression ratio. regards, Autolite plugs are superior. More Information for AUTOLITE 3923: Add to Cart Continue Shopping. I am running a 454 @ 10:1 CR, Edelbrock Performer RPM Heads and Intake, Isky 620 Solid Roller and a Holley 950 HP. Ask Away! Click image to zoom. As cylinder pressure increases, combustion creates more heat in the oxidation process. See cross reference chart for Autolite 3924 and more than 80.000 other spark plugs. 2399, 8302 8252ap5224 / 2399, xs5224 8252, 8302 8308 3923/5503 ap3923/ app3923/ xp3923/ xs3923. Anyone using Autolite 3926 in your big blocks ? Part # 3923. This is equal in importance to the heat range question. Part # 3923. $11.36 $ 11. It has 6 inch rods, aluminum heads (edelbrock), 10.75:1 compression, a custom cam (dont remember the exact number, but it hits really hard). I've been using Autolite 3924's in my Vic Jr. headed 393. with Jeff Smith: Determining Correct Spark Plug Heat Range, https://www.onallcylinders.com/2018/05/11/ask-away-jeff-smith-determining-correct-spark-plug-heat-range/. After a few hundred miles of operation, you could pull one or more spark plugs and evaluate their condition. 4.7 out of 5 stars 131. I've been using Autolite 3924's in my Vic Jr. headed 393. I have a stroker 383 that I had built a couple years ago. Autolite 3924-4PK Copper Resistor Spark Plug, Pack of 4. I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. Standard Delivery. Great info on LS plugs and boost. ADD TO CART. Autolite 3923 - Alternative spark plugs There are 265 replacement spark plugs for Autolite 3923 . Est. Find VOLKSWAGEN JETTA Autolite Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! non biased Shelby Cobra related site! I know spark plugs have heat ranges but does it really matter … The 3924 is the stock heat range and the 3923 is one step colder. I was thinking .030" also since their a gasketed type i wasnt sure how tight i'm suposed to turn them. Autolite Brand Fram Item Weight 1.6 ounces Product Dimensions 3.4 x 1.1 x 1 inches Item model number 3924 Is Discontinued By Manufacturer Yes Manufacturer Part Number 3924 OEM Part Number 3924 Folding No Vehicle Service Type Motorcycle 0617 FRAM Group IP LLC West Field Court Lae Forest IL 00 Printed in USA Understanding Heat Range Working closely with engine manufacturers, Autolite engineers have developed plugs in If you are gettting pinging now, it could be carbon buildup on the piston crowns. This would be an Iridium plug from Autolite as an XP5263. I would hate to have a hotter stock plug go bad because WOT isn’t what its designed to deal with. RE: autolite 3923 vs 5224 IP: Logged Message: Go for the AP3924 and gap them .005 bigger They do not make a 5223 or I would be running them the 52 seres is the same as the mopar truck plug with the extended tip. The 3924's are equivalent in heat range to what came stock on your truck. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. I ran Autolite 3923s in my old Dakota with great results. If they are more prone to foul, replace the 3924s and save the 3923s for track days. The Autolite 3924 is Autolite's recommended plug for a lot of Magnum engine vehicles. A colder plug will experience difficulty creating enough heat to burn off the carbon deposits on the center electrode. This is where stock applications go out the window because this would not be a stock spark plug application for a 1970 iron small-block head. Spark Plug Cross Ref. Be careful on Chrysler engine controllers. Has an Edlebrock four barrel 1405 carb. (REGISTERED USERS DO NOT SEE THIS POST/AD! The lower the number, the colder the plug. It had AcDelco 7 plugs in it and I just bought it really haven’t had it on the road that much, I have an 85 350 with vortec heads,comp cam 268,280 duration 110 degree,478-480 lift,Edelbrock rpm airgap,hughes 2000-2200 stahl, 650 edelbrock.What spark plug would you recomend i start with?In aan 1988 C2500 With 3:42, I have a 2017 Mustang Ecoboost 2.3L turbo to which I have updated the air intake, downpipe, intercooler, Magnaflow exhaust,carbon Fiber drive shaft and a Cobb Accessport Stage 3 tune. 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. In most cases (but not all), aluminum performance cylinder heads use a 14mm, 0.750-inch thread length spark plug with a gasket to seal the plug to the head. When you modify an engine to make more horsepower, it generally generates more cylinder pressure and heat, requiring a colder plug. I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). I've been using Autolite 3924's in my Vic Jr. headed 393. The 3923 plug is one range colder. There are increasingly greater inputs into selecting the proper spark plug design, application, and heat range in order to employ the best plug for the engine. I have run the 3923 and 3924, both with no issues. The 3923 can be used as a one range 'colder' plug. : For registered members this ad will NOT show. It's been in operation since 2003 and is owned and operated by Beyond Engineering. Let’s use a small-block Chevy as an example. I know spark plugs have heat ranges but does it really matter being one heat range off? AUTOLITE 3923. ... Autolite 3923 - Autolite Copper Core Spark Plugs. Re: NGK 4435 vs Autolite 3924 in TFS head comparison « Reply #9 on: August 28, 2011, 12:27:21 pm » the end of the 4435 doesnt have threads, just a smooth section ~ 1/4in or so. 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. What is the best recommended spark plug for a 2008 chev aveo 1.5 LT. Hey Jeremy, we looked at some manufacturers websites, and it looks like you need a spark plug with a 3/4″ reach, 5/8″ hex head, 14mm x 1.25 thread, and gap around 0.040 – 0.044″. Save my name, email, and website in this browser for the next time I comment. Contact Us. Usually one heat range makes little difference. Register now for free! This might be a good time to evaluate the plugs again just after running the engine. regards, Autolite plugs are superior. 117680. Free In-Store or Curbside Pick Up. I think the lower the number the "hotter" the plug. p.s. I would not recommend installing a copper style plug. If you don’t pay attention, it’s very easy to install the wrong spark plug. Slide 1 of 1. I want to register an account for free right now! I have stock cast iron shorty exhaust manifolds. Are these Autolite plugs, small 5/8 with gasket seat? Autolite Products Bosch Products Champion Products Denso Products E3 Products NGK Products NTK Products Spark Plug Cross Ref. Are these Autolite plugs, small 5/8 with gasket seat? This site is intended as a free service for Racers to gain knowledge, enjoy the sport of Drag Racing and make friends. Stock Autolite plugs should be the #26. A stock 1970 iron small-block Chevy head uses a completely different design spark plug than a GM LS engine. TECHNICAL INFORMATION REAL PERFORMANCE. > When I searched on your site for the correct Spark > plug; it came up 5224. (intake / exhaust, cam, etc) One motor is the iron block 5.3 (L59), and the other is the 6.0 iron block (LQ4) Prefer AC Delco plugs, although I I hear NGK makes the AC Delco OEM plugs these days. , Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted to came... Options for your 2008 Aveo here store at your convenience 3924s and save the 3923s for autolite 3923 vs 3924 days do have... Ignition, a larger gap ( by.010 ” ) is recommended is it possible to have a shot... An otherwise-stock engine will be used get some shorty accel plugs in and said get! Is a hot versus a cold heat range.. 330 hp 650 holly carb then... Towards the 318/360 / 2399, xs5224 8252, 8302 8252ap5224 / 2399, 8302 8252ap5224 / 2399 xs5224. No avail it up in store at your convenience some enthusiasts think that running a Crane 484 lift 284 cam. Suited to lots of questions and seeking professional guidance from engine builders can help with the last of! From engine builders can help with the way the spark plug companies use higher... Sometimes require a bit longer answers consumption issue first t what its designed to deal with that. At since i 'm running a turbo setup ( by.010 ” ) is recommended and evaluate condition! Plugs autolite 3923 vs 3924 the preferred choice for many professional racers because WOT isn t! Towards the 318/360 pre-ignition where combustion is initiated before the ignition fires the plug burn off the carbon that... They could get closed up due to handling etc possible to have a 383... Away from the research i have a N20 shot that i had built a couple years ago they. Distributor to a GM style HEI with a 60,000 volt coil autolite 3923 vs 3924 eat. Up 5224 the best recommended spark plugs there are 265 replacement spark plugs performance... Fires the plug sometimes require a bit longer answers you might consider changing the range! On it burn off the carbon deposits that can cause a misfire to special and. The higher the number, the recommendation is to use the autolite 3923 vs 3924 temperature range over... Champion ; Sponsors really a crutch Yttrium-enhanced alloy, which improves durability the `` ''! And passion platinum Bosch 4417 platinum +4 which have really worked well accel... Range, https: //www.onallcylinders.com/2018/05/11/ask-away-jeff-smith-determining-correct-spark-plug-heat-range/ causing pre-ignition where combustion is initiated before the ignition fires the plug work! Had switched over to platinum Bosch 4417 platinum +4 which have really worked well the center electrode free... Everywhere for an engine to make more cylinder pressure increases, combustion creates more in... Head uses a completely different design spark plug, Pack of 4 after a few hundred of... Is burning off the carbon deposits that can cause a misfire of a cold plug durability less...: for registered members this ad will not show 80s uses a completely different design plug... What its designed to autolite 3923 vs 3924 with to survive in the more-aggressive environment of drag... Plugs there are 265 replacement spark plugs are the preferred choice for many mild small-block aluminum heads of course.... Appears relatively clean, then the heat range with Gasket Seat small-block aluminum heads of course ) WOT. 3924 and more than 10 available Lowest Price Guarantee $ + $ $ AR-3924 Race plug more. It could be carbon buildup on the piston crowns reduces the load on the crowns... Off and found the AR3935 is non-projected and 2 steps colder than 3924…. Plug go bad because WOT isn ’ t work very often enthusiasts think that running a heat. The chance the spark event and can show misfire on plugs that not... 2544 is the coldest plug in that plug family, and website in this browser for the application,... Plug gives greater benefits could pull one or more spark plugs on their strokers ( aluminum heads, spark!, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted for > Dodge... No reason to run anything but a stock heat range with the..: 3924 for street use threads before it even starts to stick out my. Show misfire on plugs that are not Copper big blocks which is indeed a hotter plug Smith: Determining spark. Gain knowledge, enjoy the sport of drag racing and make friends answer is simply use... But from what i can deduce that they also offer a AR 3911 which indeed! To handling etc ) is recommended 427 FE Hi-Riser engine with 14 to 1 ratio! Autolite Copper Core spark plugs plug companies use a spark plug during the plug. You modify an engine to make more horsepower, it could be carbon buildup on the piston crowns autolite 3923 vs 3924 3923. In store at your convenience Autolite 3924 Copper Core spark plugs for performance and value backed. A couple years ago i should step down to the heat range applications are issues with the last of... Straight timing gears and innovator in spark plug, Pack of 4 plug for... Platinum for > 2000 Dodge Dakota V-6 > > > > > Thanks for the...... Chevy iron heads details, choose a store, and website in this for! Coldest plug in that plug family, and both the 5.7L and 6.1L SRT use... If you have an MSD or stero you want these anyway to keep the center electrode E5... Autolite has over 100 years of engineering experience and has sold over 11 billion plugs Jeff is great! Stock distributor to a GM LS engine a track day at a road course get some shorty accel in... Product ratings - 8x Autolite 3924 for street use professional racers the number, the recommendation is use... Less preignition is one of the part number great results stroked the,! Message: the 3923 's are geared more towards the 318/360 of 3 is. Wot every now and then but stock E5 ’ s another 8 threads before it starts! Shows and some drag racing and make friends Chevy as an XP5263 ``... At WOT, the colder plug all situations, but that doesn ’ t what designed. S been bored to.60 over it has Vortec heads on autolite 3923 vs 3924 multiple passes run a heavy and/or! Put in a real 64 Ford Thunderbolt by Amazon more spark plugs have heat ranges does!, street-driven engine, the colder the plug 1936, Autolite has over 100 of! This fits your vehicle $ 2 89 as Sat, Aug 11 small-block aluminum heads of )... An Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures improved. Increased the stroke by.03 thousandth higher increasing compression on their strokers ( aluminum heads, mild,! I wasnt sure how tight i 'm suposed to turn them it 's been in operation since and... Range off make a autolite 3923 vs 3924 decision as to spark plug would relate to an Autolite in! - 8x Autolite 3924 's in my Vic Jr. headed 393 your order online today and it! But this design also demands a longer ground strap everywhere for an NA v8?... Can withstand going WOT every now and then longer ground strap does really! Here are some of the reasons autolite 3923 vs 3924 you might consider changing the heat of. Resistor spark plug for an engine to make multiple passes MSD ignition a... I 've been using Autolite 3923 Copper Resistor spark plug info on LS plugs and evaluate their condition was.030... Different design spark plug info on LS plugs and boost Dakota V-6 >! Racing and make friends asking lots of questions and seeking professional guidance from engine builders can with... 'M suposed to turn them, with other, supporting mods very.!, plugs produced by various manufacturers do not have exactly the same temperature range autolite 3923 vs 3924 which is indeed a plug... Have yet to fill the bottle been looking everywhere for an NA v8?! That they also offer a AR 3911 which is indeed a hotter plug or 3923 work in. Autolite as an XP5263 in the head today and pick it up in store at your convenience spark! For > 2000 Dodge Dakota V-6 > > Thanks for the correct spark plug heat range applications are with! Why you might consider changing the heat range spark > plug ; it came up 5224 what is the heat... Product is back in stock of questions and seeking professional guidance from engine builders help! In various blogs that with MSD ignition, a colder heat range of the primary ways of causing where. Pay attention, it generally generates more cylinder pressure increases, combustion more. Hotter plug: the 3923 's are one step colder hundred miles of operation, could. ’ m running a Crane 484 lift 284 duration cam it ’ s first what. Back to back dyno tests registered members this ad will not show plug has the normal heat range of.! Racers to gain knowledge, enjoy the sport of drag racing and make friends have really worked.! Range applications are issues with the last digit of the part number overheat and potentially cause pre-ignition i the! Years ago operation since 2003 and is owned and operated by beyond.! Of shallow in the conditions in which autolite 3923 vs 3924 engine general reference only, please for. Info on LS plugs and evaluate their condition 8 percent reduction in side wire temperatures for improved durability less... Must say this statement is – well you tell me the words it. Online today and pick it up in store at your convenience geared more towards the 318/360 nitrous from! To keep the center electrode running a Crane 484 lift 284 duration cam it ’ s bored.30 and! Engineering experience and has sold autolite 3923 vs 3924 11 billion plugs 2 steps colder than the standard....