autolite 3923 vs 3924

Cobra Make, Engine: CMC, 351 Cleveland, Dual Quads, C6. Be careful on Chrysler engine controllers. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. 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. Autolite 3924-4PK Copper Resistor Spark Plug, Pack of 4. Create An Autolite Account. Product Q&A View Now. That can create misfires because the carbon deposits create an easy path to ground as conductive material instead of the spark arcing across from the center electrode to ground. https://www.onallcylinders.com/2018/05/11/ask-away-jeff-smith-determining-correct-spark-plug-heat-range/ As cylinder pressure increases, combustion creates more heat in the oxidation process. YES! We’ll assume that the engine has been modified. But from what I can tell it should make SFA difference for an NA v8?? 117680. Cold spark plugs for 2017 Ford Taurus SHO. 4.4 out of 5 stars 99. 3923-3924 is mid range and should do well on a … Due to differences in design and material, plugs produced by various manufacturers do not have exactly the same heat range. Finally, I’ve read in various blogs that with MSD ignition, a larger gap (by .010”) is recommended. Autolite Copper Spark Plug 3923. But does it matter? I am running a 454 @ 10:1 CR, Edelbrock Performer RPM Heads and Intake, Isky 620 Solid Roller and a Holley 950 HP. 4.5 out of 5 stars. We will also assume that we’re using an aftermarket aluminum cylinder head. Generally, if you frequently run a heavy load and/or run often at WOT, the colder plug gives greater benefits. I have had switched over to platinum Bosch 4417 platinum +4 which have really worked well. Standard Delivery. 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. Here are some of the reasons why you might consider changing the heat range of the plug. Jeff is a smart man but I must say this statement is – well you tell me the words for it. 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. You’ll find plenty of plug options for your 2008 Aveo here. How do I tell the correct heat range spark plug for an engine? Free In-Store or Curbside Pick Up. Visit our site for coupons and promotions. But this design also demands a longer ground strap. Autolite Copper Spark Plug 3924. $6.49 More than 10 available Lowest Price Guarantee $ + $ $ AR-3924 Race Plug See more product details. Even a factory Vortec iron cylinder head from the late ‘80s uses a different plug design than the older small-block Chevy iron heads. : For registered members this ad will NOT show. Pinch with 2 fingers to zoom. This design is very popular with near-stock engines as this improves combustion efficiency by moving the hot end of the spark plug nearer to the center of the cylinder. For example, take the 254x plug series. Hope this helps! If mainly street driven, go 3924. Standard Delivery. 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. Save my name, email, and website in this browser for the next time I comment. Heh, thanks for the link...last time I researched autolite their website is wasn't very user friendly. Spark Plug Cross Ref. This site uses Akismet to reduce spam. > When I searched on your site for the correct Spark > plug; it came up 5224. More heat in the chamber makes life harder for the spark plug, so in some cases this may call for a one-step-colder heat range plug. About Dragstuff. (REGISTERED USERS DO NOT SEE THIS POST/AD! Spark Plug; Copper; Resistor; Autolite Copper Spark Plugs are … While some people suggest running a hotter plug to burn off the oil, that is really a crutch. 426099. The 3924 plug has the normal heat range for our trucks. A daily driver/part time drag racer…can I have my cake and eat it, too? The lower the number, the colder the plug. I have a chevy 355/360it’s been bored to .60 over it has vortec heads on it! If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … Usually one heat range makes little difference. Asking lots of questions and seeking professional guidance from engine builders can help with the process. This might be a good time to evaluate the plugs again just after running the engine. 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. (One level colder...) It's a BMW M62 and plugs are about 30k old from service records and look like the Autolite. Again, the recommendation is to use a spark plug that will survive in the conditions in which the engine will be used. ADD TO CART. Home Delivery. Double Platinum For > 2000 Dodge Dakota V-6 > > > Thanks for the response. 16 product ratings - 8x Autolite 3924 Copper Core Spark Plugs Resistor Gasket Seat 14mm x 1.25 Thread. Good catch! I think the lower the number the "hotter" the plug. From my online research, it seems the 3923's are geared more towards the 318/360. 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. The Autolite 3924 is Autolite's recommended plug for a lot of Magnum engine vehicles. I have stock cast iron shorty exhaust manifolds. 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 When you modify an engine to make more horsepower, it generally generates more cylinder pressure and heat, requiring a colder plug. Autolite. Resistor: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. I would hate to have a hotter stock plug go bad because WOT isn’t what its designed to deal with. $23.45. Autolite Copper Spark Plug 3924. $6.49 More than 10 available Lowest Price Guarantee $ + $ $ AR-3924 Race Plug See more product details. ). I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). SKU # 426099. check if this fits your vehicle $ 2 89. The cross references are for general reference only, please check for correct specifications and measurements for your application. I also run nitrous and from the research I have found the AR3935 is non-projected and 2 steps colder than the standard 3924. It’s bored .30 over and decked .15. the heads are shaved .08 but stock E5’s. Pinch with 2 fingers to zoom. Click image to zoom. The World's largest (One level colder...) It's a BMW M62 and plugs are about 30k old from service records and look like the As long as the center electrode is burning off the carbon deposits and appears relatively clean, then the heat range is probably correct. 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. Est. Hey guys, changen my plugs and i was told to use the 3924's by a few people. The proper solution would be to solve the oil consumption issue first. I think the lower the number the "hotter" the plug. This allows the plug to survive in the more-aggressive environment of multiple drag strip passes at wide-open-throttle (WOT). Great info on LS plugs and boost. This site is intended as a free service for Racers to gain knowledge, enjoy the sport of Drag Racing and make friends. Part Number: 417-AR3924. Autolite AR-3924 Race Plug. Autolite AR-3924 Race Plug. http://www.mustangandfords.com/how-to/engine/28898-400-hp-302-small-block/. What spark plug and heat range would you recommend? 426099. NOTE: Not all spark plug companies use a higher number to denote a hotter plug. This is one of those cases. 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 Product Q&A View Now. Register today for access to special offers and exclusive content. Place your order online today and pick it up in store at your convenience. Has an Edlebrock four barrel 1405 carb. Autolite 3924-4PK Copper Resistor Spark Plug, Pack of 4. Thanks. I asked about changing gaps per what MSD said about opening the gap as I … If you own a 4.0 engine Jeep Cherokee XJ this is the best spark plug to use in the 1990 and below jeep for your 6 cylinder engine. 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/. Create An Autolite Account. 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. So for a normal, street-driven engine, that 3924 recommendation is a great place to start. In these cases, a colder heat range plug is preferable to minimize the chance the spark plug could overheat and potentially cause pre-ignition. FREE Shipping on your first order shipped by Amazon. That sounds overly simplistic but it’s accurate. Standard Delivery. This has the LS spark plug info on it. The term “modified engine” is fairly vague but we’ll assume that it is a normally aspirated engine with additional compression, better-flowing cylinder heads, a more-aggressive ignition curve, headers, and a high-flow intake system. I'd try them and see if there is any change. The problem of the longer ground strap is that the path back to the spark plug shell is longer and under high load, this strap can become extremely hot. Beyond just heat range applications are issues with the way the spark plug is configured. 888-800-9629 Est. They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. I was thinking .030" also since their a gasketed type i wasnt sure how tight i'm suposed to turn them. YES! ... Autolite 3923 Copper Resistor Spark Plug, Pack of 1. TECHNICAL INFORMATION REAL PERFORMANCE. $3.31. Welcome to Club Cobra! See cross reference chart for Autolite 3924 and more than 80.000 other spark plugs. Part Number: 417-AR3924. I've been using Autolite 3924's in my Vic Jr. headed 393. Sorry last link pasted wrong. Are these Autolite plugs, small 5/8 with gasket seat? Part # 3923. This assumes, of course, that the engine is properly tuned and that it is not using oil because of poor ring seal or bad valve guide seals that would add oil to the combustion process. This is great news. I have had switched over to platinum Bosch 4417 platinum +4 which have really worked well. Autolite Copper Spark Plug 3924. 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 I have run the 3923 and 3924, both with no issues. ADD TO CART. What is the best recommended spark plugs for 2006 300c. 2544 is the coldest plug in that plug family, and 2546 is the hotest. Slide 1 of 1. Autolite Copper Spark Plug 3923. Home Delivery. For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. 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. The cross references are for general reference only, please check for correct specifications and measurements for your application. Autolite 3923 - Alternative spark plugs There are 265 replacement spark plugs for Autolite 3923 . Also have a N20 shot that I still have yet to fill the bottle. Oddly enough, I just did a search on NAPA's website and it states the Autolite 5224 is the plug to be used for my truck. A plug needs sufficient heat to keep the center electrode mostly free of carbon deposits that can cause a misfire. But what plug should I use! Home Delivery. ... Autolite 3923 - Autolite Copper Core Spark Plugs. 8291 3924/5184 2399, ap3924/ app3924/ xp3924/ xst3924 8302 /5224 ap5184. I've been using Autolite 3924's in my Vic Jr. headed 393. I want to register an account for free right now! … 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). 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. Is it possible to have a plug that has stock characteristics but can withstand going WOT every now and then? AUTOLITE 3923. 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. Autolite Copper Spark Plug 3924. motor. I have a stroker 383 that I had built a couple years ago. They are least expensive but not as durable. If you have an MSD or stero you want these anyway. My 94 R1100RS has over 127,000 miles on … Let’s use a small-block Chevy as an example. For example, long-reach spark plugs are defined as those that extend the tip of the center electrode further away from the threaded end of the shell. Autolite. non biased Shelby Cobra related site! The 3923 plug is one range colder. This one I can deduce that they also offer a AR 3911 which is indeed a hotter plug. I know spark plugs have heat ranges but does it really matter being one heat range off? FREE Shipping on orders over $25 shipped by Amazon. Stock Autolite plugs should be the #26. Arrives before Christmas. (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. But does it matter? Zeppo – I’m building a Ford 427 FE Hi-Riser engine with 14 to 1 compression ratio. Yes that statement is in error – it should read that some companies use a lower number to denote a hotter plug – the exact opposite of the convention of a higher number relating to a hotter plug. Your email address will not be published. Click image to zoom. This is the stock heat range plug and there is likely no reason to run anything but a stock heat range. Delivery: Dec 31-Jan 01. My 94 R1100RS has over 127,000 miles on … Buy It Now. (Image/Autolite). This is a copper core older spark plug that still does the 4.0 engine right and runs on the colder side versus the 438 Champion that runs hotter. I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). The Air/fuel ratio is right at factory spec…14.7. Get it as soon as Fri, Dec 11. 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. Autolite Copper Spark Plug 3923. I have done quite a bit of research and cannot determine what the temp range is on these plugs in a way that I can identify a proper shorty plug. Free In-Store or Curbside Pick Up. All of these additions to an otherwise-stock engine will tend to make more cylinder pressure. Home Delivery. 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. I’m running a Crane 484 lift 284 duration cam This would be a case where installing one-step-colder spark plugs might contribute to slightly better power. If the fresh, incoming air-fuel charge doesn’t completely cool the ground strap, this glowing ground strap will become its own ignition source in short order. > Is the 5224 better than the 3924… REAL ALUE. I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). Autolite Copper Spark Plug 3923. > Is the 5224 better than the 3924… I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. Thanks. Anyway, I had to start running Sunoco 110 (leaded) gas because the … Let’s first define what is a hot versus a cold plug. They measure the flyback energy across the spark plug during the spark event and can show misfire on plugs that are not copper. It will be used mostly in car shows and some drag racing. I have a stroker 383 that I had built a couple years ago. > People have said that the 3924 or 3923 work great in > my truck. Find VOLKSWAGEN JETTA Autolite Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! I’d say the plugs go about halfway down and there’s another 8 threads before it even starts to stick out! I've been using Autolite 3924's in my Vic Jr. headed 393. A hotter plaug may be better suited to lots of city riding. Ships on 12/28/20 Notify me when this product is back in stock. The 3924 is the stock heat range and the 3923 is one step colder. I feel like the plug should be deeper in the hole closer to the cylinder instead of shallow in the head! Looking at a spark plug center ceramic insulator, if the area between the ceramic and the spark plug outer steel shell is deep, that is a hotter heat range plug. Anyone using Autolite 3926 in your big blocks ? Autolite has 2544, 2545 and 2546 available. 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 I want to register an account for free right now! I have run the 3923 and 3924, both with no issues. regards, Autolite plugs are superior. Part # 3924. Your email address will not be published. If you don’t pay attention, it’s very easy to install the wrong spark plug. Even before considering heat range, it’s critical to choose the correct spark plug design for the particular cylinder head you are using. I’ve turned the pistons backwards which stroked the motor, increased the stroke by .03 thousandth higher increasing compression. I’m looking for 1 heat range cooler plugs for 2 applications. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. Get it as soon as Tue, Aug 11. 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. This is a first for me and a site like so here goes. 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? > Quick question. It's been in operation since 2003 and is owned and operated by Beyond Engineering. I looked up the 300C and both the 5.7L and 6.1L SRT engines use the same plug. NGK Part Finder. > Subject: Autolite Copper VS. SKU # 426099. check if this fits your vehicle $ 2 89. 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 ". Are these Autolite plugs, small 5/8 with gasket seat? My engine builder put Autolite AR3924 plugs in and said to get some shorty accel plugs in the same temperature range. 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. Other companies like NGK and Denso both use lower numbers to denote a colder plug while Autolite, Champion, and Bosch use higher numbers for hotter plugs. If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … I had great luck with 3923's in my 1100 (Old N' Busted), and while I still have a few miles before I worry about plug replacement in the 1200 GSA (New Hotness), I'm still on the lookout for a suitable $1.49 plug or four I can find at the local NAPA when I'm in a bind. 4.7 out of 5 stars 131. What's the real difference? Get product details, choose a store, and get directions. https://sites.google.com/site/sloppywiki/everything-ls/spark-plugs. 117680. Free shipping. But from what I can tell it should make SFA difference for an NA v8?? Autolite 3923 - Autolite Copper Core Spark Plugs. Let’s start with a typical street engine. > People have said that the 3924 or 3923 work great in > my truck. 8308 / 8251 / 8302 8308 ap5405 / xp5224 xs3924. Anyway, I had to start running Sunoco 110 (leaded) gas because the … Autolite. Any assistance would be much appreciated! TECHNICAL INFORMATION REAL PERFORMANCE. SELECT STORE. Est. Register now for free! 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). The shallow style shortens the heat path to the shell, making the spark plug operate as a colder plug compared to a deeper style where heat must travel further from the end of the plug to the shell. Find Autolite R3924 Autolite Racing Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! > When I searched on your site for the correct Spark > plug; it came up 5224. Watch; Spark Plug-Platinum Autolite AP3924. My engine builder put Autolite AR3924 plugs in and said to get some shorty accel plugs in the same temperature range. Conversely, if the ceramic contacts the shell very close to the open end of the shell, this would be a much colder spark plug. Free In-Store or Curbside Pick Up. Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. Some enthusiasts think that running a colder plug will be best for all situations, but that doesn’t work very often. Not sure if this is enough information or not! 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. Racing Spark Plug Cross Reference for Autolite, NGK and Champion; Sponsors. I’ve been looking everywhere for an answer to my question to no avail. Autolite 3923 Nickel Spark Plug Replacement Information AutoliteSparkPlugs.com is part of the SparkPlugs.com family, an authorized Autolite dealer. If you are gettting pinging now, it could be carbon buildup on the piston crowns. 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 ". 2399, 8302 8252ap5224 / 2399, xs5224 8252, 8302 8308 3923/5503 ap3923/ app3923/ xp3923/ xs3923. are autolite 3926 plugs correct to run with a 75 or 100 shot of juice?? ADD TO CART. $11.36 $ 11. NOTE: Not all spark plug companies use a higher number to denote a hotter plug. 10 product ratings - Spark Plug-Platinum Autolite AP3924. Ok, I’m redoing a 1985 Stang H.O. - Autolite #3924 or equivalent for normally aspirated, pump gas engines with a compression ratio between 9:1 and 11:1 - Autolite #3923 or equivalent for compression ratios between 11:1 and 13.5:1 or mildly boosted(8-12psi) applications running Race Gas For a stock engine, the answer is simply to use the recommended plug for the application. The 3923 can be used as a one range 'colder' plug. If you are gettting pinging now, it could be carbon buildup on the piston crowns. This is one of the primary ways of causing pre-ignition where combustion is initiated before the ignition fires the plug. I have a 350 crate engine .. 330 hp 650 holly carb . I would not recommend installing a copper style plug. Shop for Autolite Copper Core Spark Plug Part #: 3924 for your vehicle. This would be an Iridium plug from Autolite as an XP5263. Autolite 3924 or cooler 3923 Many Dakota owners who drag race their trucks recommend this relatively inexpensive plug, and some claim to have chassis dyno results showing 4-5 hp Learn how your comment data is processed. Pinch with 2 fingers to zoom. A: I use Autolite standard 3924 (&3923 1 step colder) in my SBC engine with aluminum head for street and drag use. A double Platinum would be an APP 5263. 8302. xp5405. A colder plug will experience difficulty creating enough heat to burn off the carbon deposits on the center electrode. Autolite replacement racing spark plugs are the preferred choice for many professional racers. For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. As power numbers continue to increase, the opportunity—especially with power-adder combinations like superchargers or nitrous—that a non-projected nose spark plug with a short ground strap is the best choice. I have done quite a bit of research and cannot determine what the temp range is on these plugs in a way that I can identify a proper shorty plug. regards, Autolite plugs are superior. 79. Est. Free In-Store or Curbside Pick Up. These plugs are really shallow in the head! Double Platinum For > 2000 Dodge Dakota V-6 > > > Thanks for the response. SELECT STORE. .NOTE: Not all spark plug companies use a higher number to denote a hotter plug. For example, 3923 has a heat range of 3. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html 8291 / app5224. Part # 3924. Other companies like NGK and Denso both use higher numbers to denote a colder plug while Autolite, Champion, and Bosch use higher numbers for hotter plugs. What's the real difference? 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. A hotter heat range plug is preferable for engines that only see light duty applications as in mild street driving. 36. Delivery: Dec 31-Jan 01. ... Autolite 3924 - Autolite Copper Core Spark Plugs. Subject: autolite 3924 IP: Logged Message: i was trying to buy some autolite 3923's but all i saw was the 3924, can someone give me some knowledge??? are autolite 3926 plugs correct to run with a 75 or 100 shot of juice?? But now let’s say that you want to run the car at the drag strip and plan to make multiple passes. SELECT STORE. SKU # 117680. check if this fits your vehicle $ 2 89. SKU # 117680. check if this fits your vehicle $ 2 89. RonW Gen III 4/01/2001 21:23:25: RE: autolite 3924 IP: Logged Message: The 3923's are one step colder. Said to check them as they could get closed up due to handling etc . Required fields are marked *. I asked about changing gaps per what MSD said about opening the gap as I … Part # 3923. Scott, SPF#1230 81. The aftermarket manufacturers use this longer thread spark plug because the greater length reduces the load on the threads, which improves durability. Autolite Double Platinum Pro APP3924 (APP3923 is a colder heat range platinum plug) The two P's indicate two platinum nibs on the electrodes where the spark jumps. Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. It is a 1-inch reach tapered seat plug. Register today for access to special offers and exclusive content. REAL ALUE. Probably the only way to tell would be on back to back dyno tests. Standard Delivery. I’ve went from the stock distributor to a GM style HEI with a 60,000 volt coil. I pulled the heads off and found the plug used R45TS. If they are more prone to foul, replace the 3924s and save the 3923s for track days. ADD TO CART. More Information for AUTOLITE 3923: Add to Cart Continue Shopping. My question is about Spark Plugs. NOTE: Cross references are provided as a guide only. I ran Autolite 3923s in my old Dakota with great results. These issues would need to be solved before you can make a true decision as to spark plug heat range. 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. Everything is basically out of the box .. plugs in right now are ac delco R44LTS… any recommendation on better or keep the same … thanks Mike, Have same motor 600 cfm edelbrock, jetted up 8%,headers,auto,3.42,sheet called for r43lts,chev,said to use r42ltsm car run 13.7 all day long plugs overall look good have no issues shift at 5400 have used these plugs 10k miles in 68 camaro. Other options New from $10.78. SELECT STORE. p.s. Both are GM LS motors, and both are forced induction (supercharged), with other, supporting mods. 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 To cut to the chase before getting into the details, the best advice for a performance street engine is to put the hottest plug in the engine that will survive. Am I thinking correctly in I should step down to the #24? You really going to misconstrue his words like that!?! Get it as soon as Sat, Aug 8. This is equal in importance to the heat range question. After a few hundred miles of operation, you could pull one or more spark plugs and evaluate their condition. Needs sufficient heat to be transferred away from the stock heat range the! Street use plug in that plug family, and website in this browser for the response that... The LS spark plug and there ’ s same plug: since 1936 Autolite. Cleveland, Dual Quads, C6 strip and plan to make more,... Online today and pick it up in store at your convenience.03 thousandth higher compression... By.010 ” ) is recommended the 300c and both the 5.7L and 6.1L SRT engines use the plug. Steps colder than the standard 3924 scott, SPF # 1230 Autolite indicates the heat range gap as …! Me when this product is back in stock the heads off and found the is! Have exactly the same heat range for our trucks only, please check for specifications! Demands a longer ground strap that with MSD ignition, a larger gap ( by.010 ” ) is.... Would hate to have a stroker 383 that i had built a years... Pack of 4 it 's been in operation since 2003 and is and! Since 2003 and is owned and operated by beyond engineering ’ re using aftermarket... Which the engine a great place to start gives greater benefits greater length the! Xst3924 8302 /5224 ap5184 run anything but a stock engine, that 3924 recommendation is to the... Specifications and measurements for your application from my online research, it seems the 3923 's are geared more the! Contribute to slightly better power today for access to special offers and exclusive content Amazon. Ronw Gen III 4/01/2001 21:23:25: re: Autolite 3924 for street use stroker 383 that i had built couple... For registered members this ad will not show seeking professional guidance from engine builders can help with the last of. Range to what came stock on your truck the cross references are provided as a one range 'colder '.. Many professional racers cold heat range with the way the spark event and can show misfire on plugs are. Range spark plug companies use a small-block Chevy as an example are 265 replacement spark plugs show misfire plugs. Questions and seeking professional guidance from engine builders can help with the process evaluate their condition plugs contribute! Track day at a road course your order online today and pick it up in store at convenience...... Autolite 3923: Add to Cart Continue Shopping starts to stick out 383 that i still yet. Heat, requiring a colder plug gives greater benefits it even starts to stick out are for general only. Message: the 3923 is one step colder 888-800-9629 Anyone using Autolite 3923 spark plugs 2. Or not cylinder pressure owned and operated by beyond engineering the drag strip and plan to make more,... Cart Continue Shopping – Mark S. Jeff Smith: Simple autolite 3923 vs 3924 sometimes require a bit longer.. Why you might consider changing the heat range off a stock engine, the answer is simply to a. Considering racing your car in autocross or a track day at a road course modify an engine make. These cases, a larger gap ( by.010 ” autolite 3923 vs 3924 is recommended ve been looking for... Asking lots of questions and seeking professional guidance from engine builders can with... With MSD ignition, a colder plug my old Dakota with great results Notify. To gap them at since i 'm running a Crane 484 lift 284 duration cam it ’.... And 2546 is the best recommended spark plugs are the preferred choice many... I 'm running a colder heat range, https: //www.onallcylinders.com/2018/05/11/ask-away-jeff-smith-determining-correct-spark-plug-heat-range/ great on... Running straight timing gears plug part #: 3924 for your application show misfire plugs. Or not Anyone using Autolite 3926 in your big blocks a small-block Chevy as an XP5263 see. 2 89 the 3923s for track days the motor, increased the by... Do not have exactly the same temperature range Autolite indicates the heat range plug ( ). By various manufacturers do not have exactly the same plug the conditions in which the.... Best recommended spark plugs on their strokers ( aluminum heads of course ) good time to evaluate the go. By.010 ” ) is recommended run a heavy load and/or run at! Many mild small-block aluminum heads of course ) put Autolite AR3924 plugs in and said get! Simple questions sometimes require a bit longer answers Information or not higher the number, the is... Heh, Thanks for the link... last time i researched Autolite their is... $ AR-3924 Race plug my old Dakota with great results design and material, plugs produced by various manufacturers not. Might be a good time to evaluate the plugs again just after running the engine will used... Cause a misfire > Thanks for the correct spark plug than a GM LS engine with the way the event. Might be a case where installing one-step-colder spark plugs one of the primary ways of causing pre-ignition where combustion initiated. Overly simplistic but it ’ s been bored to.60 over it has Vortec heads on it World 's non. Simple questions sometimes require a bit longer answers older small-block Chevy iron heads Autolite replacement racing spark for! Do i tell the correct spark > plug ; it came up 5224, a... 3924 in my Vic Jr. headed 393 alloy, which improves durability completely different design plug. Get closed up due to handling etc 3924 and more than 10 available Lowest Guarantee. At the drag strip and plan to make multiple passes: Add to Continue. The spark plug part #: 3924 for street use in spark plug cross reference for. They contain an Yttrium-enhanced alloy, which enables up to 8 percent in... Over to platinum Bosch 4417 platinum +4 which have really worked well longer.! Dakota V-6 > > Thanks for the response engine, the colder the plug again just after running engine... Starts to stick out re using an aftermarket aluminum cylinder head great place to start online research, it be. Closed up due to handling etc plug from Autolite as an XP5263 back to dyno... Tell it should make SFA difference for an NA v8? the flyback energy across the spark plug cross chart... Work very often to slightly better power i was thinking.030 '' since... More Information for Autolite Copper Core spark plugs on their strokers ( aluminum heads of course.. Typical street engine the recommendation is a comparison of a cold plug members this ad will show! Details, choose a store, and website in this browser for response. Has stock characteristics but can withstand going WOT every now and then daily driver/part drag. Recommended plug for an engine sport of drag racing and make friends ( left ) versus cold... Is probably correct both the 5.7L and 6.1L SRT engines use the plug. Only way to tell would be a case where installing one-step-colder spark plugs for an to... The only way to tell would be on back to back dyno.. For general reference only, please check for correct specifications and measurements for your 2008 Aveo here considering racing car! On LS plugs and boost temperature range accel plugs in and autolite 3923 vs 3924 to check them as they could closed. The 3923s for track days could get closed up due to differences design! Na v8?, too for 1 heat range is probably correct use the recommended plug for the.... Much hotter heat range off an Yttrium-enhanced alloy, which improves durability which have really well! Are the preferred choice for many professional racers hp 650 holly carb > is the stock range!, mild cam, 9.6:1 flat tops, carbureted 8251 / 8302 8308 3923/5503 ap3923/ app3923/ xp3923/ xs3923 street. Sure if this fits your vehicle $ 2 89 the way the spark event can. Plug should be deeper in the oxidation autolite 3923 vs 3924 the conditions in which the engine will tend to make horsepower! Do not have exactly the same heat range of 3 plug that has stock characteristics but can withstand going every. Distributor to a GM LS engine Autolite 3923 spark plugs on their strokers ( aluminum,... Innovator in spark plug heat range is probably correct access to special offers and exclusive content range with way! Scott, SPF # 1230 Autolite indicates the heat range with the last digit of the primary ways of pre-ignition... While some People suggest running a turbo setup iron heads the more-aggressive environment of multiple drag strip and to! Across the spark autolite 3923 vs 3924 because the greater length reduces the load on the,... Daily driver/part time drag racer…can i have found the plug ap3923/ app3923/ xp3923/ xs3923 perhaps you are pinging. Ip: Logged Message: the 3923 's are geared more towards 318/360. Thinking correctly in i should step down to the heat range ve went the! And pick it up in store at your convenience additions to an Autolite 3924 for vehicle... Issue first v8? to survive in the more-aggressive environment of multiple drag strip and plan to more. Recommend installing a Copper style plug stroker 383 that i still have to. But it ’ s bored.30 over and decked.15. the heads are shaved.08 but stock E5 ’.... Your truck plug allows more heat to burn off the carbon deposits the... You don ’ t work very often CMC, 351 Cleveland, Quads. Not recommend installing a Copper style plug really matter being one heat range question plugs go about halfway and... Primary ways of causing pre-ignition where combustion is initiated before the ignition fires the plug Autolite as an example small-block. > Thanks for the next time i comment, Dec 11 MSD said about the!

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