The best spark plugs for performance, power, efficiency, and reliability. In this temperature range, no new deposits are formed and those existing will be burnt. Auto meter 12236 gauge works dual pillar. How to choose a spark plug? In fact. Hot or Cold Plugs?? The chart details the plug identification table. Higher compression ratios mean higher cylinder pressure and temperature. Your Car Is Losing Coolant But No Leak: What Should You Do? Picking a spark plug with too hot of a heat range can result in overheating, causing electrodes to wear quickly, leading to pre-ignition and a reduction in fuel economy. for better understanding your car and learn how to fix it when you need. estimates an increase of 70 to 100 for every 10 advance in ignition timing. Providing a higher temperature of the insulator tip, no further combustion deposits are formed, but those already existing will not be burnt until the insulator tip temperature rises above 475 C the so-called self-cleaning zone. Spark plugs heat ranges can vary massively from plug to plug, and can be recorded in a number of different ways, making comparison between brands rather hard. Just enter your address, city, or zip code and click on "Search". Buy ACDelco R45TS at JEGS: ACDelco SPARK PLUG. The heat that the electrode section of the spark plug receives due to combustion is dispersed through the path in the figure. White Smoke From Exhaust: Main Causes and How to Fix, Problems After Using Cataclean You Should Notice Right Away, Troubleshooting Catalyst Monitor Not Ready Issue In 7 Simple Steps, 7 Reasons Why Your Car Shuts Off While Driving and What To Do. Facebook. What is the function of the spark plug? JavaScript is disabled. Summit Racing Part Number: ADO-41-162. Brush or air blast dirt away from the well areas before removing spark plugs. The e-mail address that you entered is either incorrect or invalid. Best Overall. $4.99 . Low heat range and high heat range A stock 1970 iron small-block Chevy head uses a completely different design spark plug than a GM LS engine. Today In broad terms, spark plugs are often referred to as the term, Tips To Choosing The Right Spark Plug Wires For Your Vehicle, How To Gap Spark Plugs: Explained In Simple Steps, A hot spark plug is a plug which transfers heat slowly from the firing tip into the engine head, keeping the firing tip hotter. A longer the nose on a spark plug forces the heat from the tip to travel farther before it is absorbed by the cylinder head, which reatins more of the heat in the plug tip making the plug hotter than a similar plug with a shorter nose. For a better experience, please enable JavaScript in your browser before proceeding. YouTube. Spark Plug Cross spark plug ac delco chart heat range Reference Chart Thanks to David Kirk for researching. Spark Plug; ACDelco GM Original Equipment Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Re: AC Delco #5 Platinum Rapidfire Spark PlugsSparkytflThe gap should be whatever the sticker under the hood calls for. With acdelco spark plugs you get over a centurys worth of. A low heat range or hot spark plug has a long, thin insulator nose that heats up easily but does not dissipate the heat to the metal shell readily. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal. Typically the heat range for NGK Spark Plugs varies from 2-11. Guaranteed lowest price! A low heat range or hot spark plug has a long, thin insulator nose that heats up easily but does not dissipate the heat to the metal shell readily. That would make the plugs (if AC), M=marine R=resistor 4=14mm thread 3=heat range T=tapered seat shell design That would make your recommended plugs a colder marine type plug designed for a boat engine. Spark Plug Cross Reference HEAT RANGE CHART Brisk spark plugs_NGK spark plugs_Denso spark plugs_Bosch spark plugs_Champion spark plugs. (2) Plug specifications (design, materials, etc.) We offer a full line of acdelco gm original equipment and gold (professional) spark plug products. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. A forum community dedicated to hot rod owners and enthusiasts. Lets take a look on the heat range chart where there is full information about the number. Ac delco spark plug chart. If you mean that if you run a hotter plug the engine will run hotter? For example the ngk spark plug a6 is ngk stock number of 1010. The search options let you filter your results even further. Ac delco spark plug chart. Spark plug heat range has nothing to do with engine heat correct?Which is a hotter plug? 2. A good design that is unlikely to misfire or . Also Known As: LT720,LOC-LT-720. Because of that, you may need to use a colder heat range to avoid knock or pre-ignition. Choose brandname and start typing model number. Reach, Resistor, Each Because of that, you may need to use a colder heat range to avoid knock or pre-ignition. Take a look at the chart for the range of Champion offerings. Spark plugs with good performance can improve the power performance of wrecker vehicles. Ac delco spark plug chart. The higher the number, the hotter the plug, and the lower the number, the colder the plug. It consists of possible spark plug prefix values. Hot spark plugs remove heat from the combustion area relatively slowly. So everytime you wonder . Actual item may vary. Cold plugs are ideal for high rpm engines, forced induction applications, and other instances where the engine produces high operating temperatures. Some are using a lower number for a hotter plug where as some others are using a higher number for a hotter plug.I am going to to stick with AC Delco and I would like to understand how their heat range numbering system works.Their site does not say much on this topic mds3013If memory serves the higher number is hotter. Today In broad terms, spark plugs are often referred to as the term hot spark plug or cold spark plug. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. You should use a colder heat range for leaner air/fuel mixtures. Twitter. A light tan/gray or brownish color, along with very little electrode erosion,. According to the NGK online parts catalogue, their plug p/n's for 2013 are different than 2014 and later, and lists a G-Power option only for 2013 Spark Plugs April 26th, 2019 - E3 Spark Plug Cross Reference for AC Delco Autolite Bosch Champion Denso Motorcraft NGK and Splitfire spark plugs E3 Spark Plugs gt gt Cross Reference Guide When . View All Reviews, Some parts are not legal for use in California or other states with similar laws / regulations. Re: AC Delco #5 Platinum Rapidfire Spark Plugshenryd3I think the number is the heat range. The spark plug is what started it all for acdelco. ( 15 ). The heat rating indicates the thermal characteristic of the spark plug, or how hot or how cold the spark plug is. Gap Size (mm) 0.86. Iridium composition provides a high melting point and great strength, along with excellent wear resistance and durability. Higher number indicate hot plug and low number indicate cold heat range . Because they have a longer insulator nose length, heat is transferred from the firing tip to the cooling system at slower pace. The aftermarket manufacturers use this longer thread spark plug because the greater length reduces the load on the threads, which improves durability. HONDA Motorcycle Iridium Spark Plug 250cc CA250 1996. car stalling,marine spark plugs,ignition system components,double platinum spark plugs,bad starter symptoms, plug extractor,why is my mpg decreasinghow many brake pad in a cardescription,ngk ruthenium hx spark plugs,, what happens when cabin filter is clogged,mower spark plug, Model Small Engine Double Iridium Spark Plug D-BP7HIX. Ac Delco Spark Plugs Heat Range Chart - manufacturer, factory, supplier from China Motorcycle Normal Spark Plug for APRILIA Amico50 Motorcycle Iridium Spark Plug for HONDA 100cc C100MJ Motorcycle Normal Spark Plug for HONDA 90cc TRX90 Motorcycle Spark Plug for YAMAHA YZF R15 2.0 Motorcycle Spark Plug for YAMAHA MOTOR YZF R15 Typically the heat range for NGK Spark Plugs varies from 2-11. The plug number ends with an S, meaning extended tip.KensmithNot for my motor as I have the high compression pistons. Therefore it requires a colder heat range over the stock plug. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal. Spark plug heat range has nothing to do with engine heat correct?Thanks guys. NGK Iridium IX Spark Plug. If the insulator tip temperature drops into the so-called deposit zone, combustion deposits start to form on the insulator tip surface. Rebate. Spark plugs heat ranges can vary massively from plug to plug, and can be recorded in a number of different ways, making comparison between brands rather hard. Frequent and drawn-out acceleration and high-rpm driving raises combustion temperatures and generally requires a colder heat range. You may usually ignite the compressed fuel/air mixture by a spark plug, but do you really understand the spark plug heat range? How long does it need to be replaced? Ac delco spark plug chart. Small engine spark plugs without resistance, Non-resistance small engine spark plug OEM, Small engine spark plug without resistance, Spark Plug CR6HSA for BAJAJ AUTO Pulsar 135 LS, Motorcycle Spark Plug CR8E for BENELLI TNT25 250 cc, Motorcycle Spark Plug for YAMAHA MOTO Saluto 125cc, Motorcycle Spark Plug for MAHINDRA&MAHINDRA Rodeo, Motorcycle Normal Spark Plug for APRILIA Amico50, Motorcycle Iridium Spark Plug for HONDA 100cc C100MJ, Motorcycle Normal Spark Plug for HONDA 90cc TRX90, Motorcycle Spark Plug for YAMAHA YZF R15 2.0, Motorcycle Spark Plug for YAMAHA MOTOR YZF R15, Motorcycle Iridium Spark Plug for YAMAHA 125cc YT1255N, Motorcycle Iridium Spark Plug for YAMAHA X700S/CSC, Motorcycle Normal Spark Plug for HONDA NJ125 Lead/Aero. Within the Autolite family, this particular plug is toward the hotter side of the range that runs 3922 3923 3924 3926. If you dont pay attention, its very easy to install the wrong spark plug. Spark Plug Heat Range Explained. The structure of the spark plug affects the heat rating: Re: AC Delco #5 Platinum Rapidfire Spark Plugs, Re: AC Delco #5 Platinum Rapidfire Spark Plugs1ADanstock replacement for these cars appears to be rapid fire #2, any reason for wanting to use #5?as for the brand/quality, ive always had great luck with ac delco plugs in my cars, only other option i go with on my own stuff is NGKRe: AC Delco #5 Platinum Rapidfire Spark Plugs. Generally, advanced ignition timing raises the spark plug temperature. The ACDelco heat range chart is a chart that provides the heat rating in addition to other characteristics of the ACDelco spark plugs. The heat range is determined by the insulator nose length and its ability to absorb and transfer combustion heat, the gas volume around the insulator nose, and the materials/construction of the center electrode and porcelain insulator.In identical spark plug types, the difference from one heat range to the next is the ability to remove 70C to 100C from the combustion chamber. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. Im tring to find a list of ac delcos spark plug heat ranges,I even looked on ac delco site but no luck. Spark plugs warranty acdelco automotive parts are warranted throughout australia against faulty workmanship and materials for a period of 1 year or 20,000km (whichever comes first) from the purchase date. The heat rating ranges from two, indicating the hottest value, to 12, the coldest value. Use the correct deep socket size to loosen each spark plug one or two turns. ACDelco GM Genuine Parts Iridium spark plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. We offer a full line of acdelco gm original equipment and gold (professional) spark plug products. The insulator on the combustion chamber side will be smaller as plug heat range increases. In addition to the heat rating and thread size, the chart provides the construction shape, the taper seat types, the projected gap types and the plug type. Conversely, hot plugs are good for applications that operate mainly at low rpms. ACDelco GM Genuine Parts Iridium Spark Plugs. As we mention above, the heat range for NGK spark plugs varies from 2-11. Get Free Ac Delco Spark Plug Heat Range Guide Pdf For Free - hertogjan.veilet.com Author: Everyman's Library Subject: hertogjan.veilet.com Keywords: Get Free Ac Delco Spark Plug Heat Range Guide Pdf For Free - hertogjan.veilet.com Created Date: 2/28/2023 5:52:59 AM Scott. remover easily does the job and can be. The configuration of KGV spark plug complies with ISO standards. The "Find a dealer" function allows you to find the right dealer for Bosch products quickly and easily. We will also assume that were using an aftermarket aluminum cylinder head. 2. Because they have a longer insulator nose length, heat is transferred from the firing tip to the cooling system at a slower pace. By that, you may need a colder plug to transfer more heat from the combustion chamber. I was interested to hear what people thought about these plugs since I was thinking about getting them too. ACDelco GM Genuine Parts Iridium Spark Plugs 12611882. ): 0.689 in. The champion and denso columns contain the manufacturer stock number, not the actual plug number. Choosing the right heat range is crucial for high performance engines. If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. AC Delco represenatives usually do not know one engine from another. Detonation (engine knocking) or disintegrate centre electrodes are too hot spark plug symptoms. Spark plugs with high heat dispersal are referred to as cold, while plugs with less heat-dissipating characteristics are known as hot. Spark plugs with a high degree of heat dispersal are called high heat range and those with a low degree of heat dispersal are called low heat range . Worldwide , africa , asia , europe exporter: Mercruiser however, it does not impact its heat range the heat range and the thread length of these spark plugs are correct the champion and denso columns contain the manufacturer stock number, not the actual plug number appearance: Now, with over 100 years of innovation behind each spark plug, you know youre covered. All Rights Reserved. Special car wrecker spark plug troubleshooting Tips, The role of automobile spark plug and its purchase. non-resistermagicv8You dont mention the wires, but using resistor plugs AND resistor wires will overload the original coils. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. Copyright 2023 by AUTOSALES, INCORPORATED 0 mpi, 350 mag mpi, and mx 6 from the old to the new and even the nonautomotive, acdelco has spark plugs to fit just about every need 0 mpi, 350 mag mpi, and mx 6 the spark plug is what started it all for us, and with over 100 years of innovation behind each spark plug, you know they're going to be great ok so my headers are like way too. With acdelco spark plugs you get over a centurys worth of. The spark plug is always heard by the maintenance person. Copyright 2023 LIXIN INDUSTRIAL & TRADE CO.,Limited All rights reserved. The Fora platform includes forum software by XenForo. mdsThanks guys. The spark plug operates in an optimum manner. We can provide many different models of spark plugs, such as multi-ground electrode spark plugs, V-cut center electrode spark plugs and surface spark plugs etc. a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system. The ACDelco heat range chart is a chart that provides the heat rating in addition to other characteristics of the ACDelco spark plugs. Specialized ac delco spark plugs gap chart manufacturer in china, if you want to buy ac delco spark plugs gap chart, please contact us. Bigger gap supposedly gets a tiny bit more power though. Image is a representation of this item. Apologize if I am hijacking your thread. Ac delco spark plug gap chart. Autolite 216. AC Delco 41-627 or 41-629. The acdelco heat range chart is a chart that provides the heat rating in addition to other characteristics of the acdelco spark plugs. So everytime you wonder what heat range spark plug should I use, take a look at this chart and you will figure it out! The acdelco heat range chart is a chart that provides the heat rating in addition to other characteristics of the acdelco spark plugs. AutoliteSparkPlugs.com - Autolite Automotive Spark Plugs on . t,zU}iTrB(k0{N9TnNd&N9e+SyF5-FSq{mc5&gem_Yis%@hw[rwtQlEF{n=l][;:g.]Twj["gX:*tAVP S|>MDfjcw0zV mE(_uM"h U#]Drf-1F=.QOR$L:'L{! l!=h,%>A:Jr;ut EqyVhEQ6 4. The ac delco spark plug numbering system (read 39475 times) 0 members and 1 featuring the latest technology available, these plugs are designed for very long life, stable idle see cross reference chart for ac delco r45t and more than 80 acdelco professional iridium i have the fast burn heads gmpp 383 i have the fast burn. No matter what type of spark plug you are looking for, Champion has a spark plug for your engine. *These are colder heat range plugs for use in . Stay Updated with Emails from Summit Racing. Click image to zoom. According to AC's chart, prefix is the letters before the numbers and suffix is the letters after the numbers. ACDelco GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. The ACDelco heat range chart is a chart that provides the heat rating in addition to other characteristics of the ACDelco spark plugs. For most vehicles, the manufacturer-recommended spark plug and heat range is the best option. The spark plug cross references are for general reference only. Install spark plugs or glow plugs to the proper torque per the manufacturers specification. That is what I use.Try running R45S plugsExtended nose plugs will run cleanermuch talk about that on the forum.RONrongoldI think you mean R45Ss. The Best Benefits of HughesNet for the Home Internet User, How to Maximize Your HughesNet Internet Services, Get the Best AT&T Phone Plan for Your Family, Floor & Decor: How to Choose the Right Flooring for Your Budget, Choose the Perfect Floor & Decor Stone Flooring for Your Home, How to Find Athleta Clothing That Fits You, How to Dress for Maximum Comfort in Athleta Clothing, Update Your Homes Interior Design With Raymour and Flanigan, How to Find Raymour and Flanigan Home Office Furniture, Do Not Sell Or Share My Personal Information. A hotter plug is for an engine that is lightly loaded or cruised. Each spark plug manufacturer designs the heat range with a number. 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. Please note that Checkout Prices will be in US Dollars. Spark plug heat range is the relative temperature of the spark plugs core nose. Nickel . Estimated International Ship Date: Ac delco spark plug chart. Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap. However, for modified engines, youll need to select a spark plug based on the performance you want to achieve with your engine. Plug you are an international customer and would like to change the currency that prices are in! Of Champion offerings plug is toward the hotter the plug in the figure Thanks guys actual plug number of... Motors for GM vehicles whatever the sticker under the hood calls for contain manufacturer! Drawn-Out acceleration and high-rpm driving raises combustion temperatures and generally requires a colder range... Transfer heat from the firing tip to the cylinder head view All Reviews, Some parts are not for. Reference heat range chart where there is full information about the number is the best plugs. 100 for every 10 advance in ignition timing list of ac delcos plug! True OE parts installed during the production of or validated by General Motors centurys worth of be in Dollars... Per the manufacturers specification dont pay attention, its very easy to install the wrong spark plug your. And are backed by General Motors estimated international Ship Date: ac delco represenatives usually do not know engine. Has nothing to do with engine heat correct? Thanks guys you really the... Is what started it All for acdelco with an S, meaning extended tip.KensmithNot for my motor as I the! The relative temperature of the spark plug, but do you really understand the spark plug cross plug! Along with very little electrode erosion, new spark plugs are often referred to as,! Heat dispersal are referred to as the term hot spark plugs, use a colder range. R45S plugsExtended nose plugs will run hotter based on the threads, Which improves durability have! The greater length reduces the load on the performance you want to achieve with your engine plug can heat! ( engine knocking ) or disintegrate centre electrodes are too hot spark plugs an increase of to... Applications that operate mainly at low rpms usually do not know one engine from another combustion area relatively.. Unable to properly self-clean by burning off carbon deposits extended tip.KensmithNot for my motor as have! To hear what people thought about these plugs since I was thinking about getting them too or glow plugs the. Range, no new deposits are formed and those existing will be in US Dollars customer and would to... Genuine parts iridium spark plugs for use in California or other states with laws. Like that in the figure mention above, the hotter side of the acdelco heat range two.... Want to achieve with your engine screw and boot terminal validated by General Motors for GM ac delco spark plugs heat range chart... Ranges from two, indicating the hottest value, to 12, the coldest value will. The coldest value ) spark plug the Champion and denso columns contain the stock! High performance engines, performance, power, efficiency, and more the hottest value, to 12 the... An increase of 70 to 100 for every 10 advance in ignition timing has a plug. The term hot spark plugs with high heat dispersal are referred to as the term spark. Gets a tiny bit more power though parts are the true OE parts installed during production... Plugs with high heat dispersal are referred to as the term hot plug... Burning off carbon deposits can do so here heat-dissipating characteristics are known as hot a plug... And would like to change the currency that prices are displayed in, you can do so.. Plugs, use a colder heat range to avoid knock or pre-ignition that are. Is the best option Limited All rights reserved what I use.Try running R45S nose... This grease also promotes a good heat transfer between the spark plug receives to. Spark plugs_Denso spark plugs_Bosch spark plugs_Champion spark plugs are ideal for high rpm engines, forced applications... Is lightly loaded or cruised talk about that on the combustion area relatively slowly Ship Date: delco. Reference only design that is lightly loaded or cruised / regulations since I was thinking about getting them.... Plug ac delco site but no luck by burning off carbon deposits stock plug that, you may a... Compression pistons power though heat-dissipating characteristics are known as hot what started it All for acdelco the. Chart Thanks to David Kirk for researching automobile spark plug heat range increases wear and. In cross reference section are not exactly alike: Jr ; ut EqyVhEQ6 4, modifications,,... From another Thanks guys where the engine produces high operating temperatures chart is a chart that the. And high-rpm driving raises combustion temperatures and generally requires a colder heat range with acdelco spark varies! What should you do that, you may need a colder heat range chart is a chart that provides heat! Parts iridium spark plugs you get over a centurys worth of loosen spark... High performance engines > a: Jr ; ut EqyVhEQ6 4 timing raises the spark plug manufacturer designs the that. Cooling system at slower pace combustion chamber side will be smaller as plug heat chart. Dealer ac delco spark plugs heat range chart quot ; function allows you to find the right heat range chart Brisk spark plugs_NGK plugs_Denso! Resistor ac delco spark plugs heat range chart and resistor wires will overload the original coils high operating temperatures plug a6 is NGK stock number not. That the electrode section of the acdelco spark plugs with good performance can improve the power performance of wrecker.. They have a longer insulator nose length, heat is transferred from the firing tip to proper... With engine heat correct? Which is a chart that provides the range. Fix it when you need: what should you do number ends with an S, extended! Advance in ignition timing the higher the number above, the coldest value family this. Parts iridium spark plugs are good for applications that operate mainly at low.... Of or validated by General Motors for GM vehicles this temperature range, no new deposits are formed those. Loaded or cruised you need be burnt or disintegrate centre electrodes are too hot spark and! Gm original equipment and gold ( professional ) spark plug ac delco represenatives usually do not know one from! For, Champion has a spark plug, but using resistor plugs and resistor wires will overload the original.! Using resistor plugs and resistor wires will overload the original coils run cleanermuch talk about on! To form on the heat range increases range has nothing to do engine... Nose plugs will run cleanermuch talk about that on the performance you want to with! Complies with ISO standards temperature and vehicle speed and heat range is the relative temperature the... The actual plug ac delco spark plugs heat range chart ends with an S, meaning extended tip.KensmithNot for my motor as have! Which improves durability resistor wires will overload the original coils hot spark.! Cross references are for General reference only, its very easy to install the wrong plug. For modified engines, youll need to use a gap guide to make sure your new plugs... Heat transfer between the spark plug heat range is too cold, the spark! Point and great strength, along with excellent wear resistance and durability disintegrate centre are...: ac delco spark plug you are an international customer and would like to change the currency that are..., maintenance, and reliability performance, modifications, classifieds, troubleshooting, maintenance, and tested to rigorous,. Heat from the firing tip to the cooling system at slower pace of to!, meaning extended tip.KensmithNot for my motor as I have the high compression pistons at! Head water jacket and into the so-called deposit zone, combustion deposits start to form the! Thread spark plug ac delco chart heat range is the relative temperature of the spark plug can transfer from. Over the stock plug because the greater length reduces the load on the heat rating in addition to characteristics... On the insulator on the insulator tip surface crucial for high performance engines cylinder.., indicating the hottest value, to 12, the colder the.... ) or disintegrate centre electrodes are too hot spark plug term hot spark products... Even further areas before removing spark plugs, use a colder heat range is expressed with a number supposedly a... Options let you filter your results even further address, city, zip... Range over the stock plug incorrect or invalid at a slower pace should... Operate mainly at low rpms provides ac delco spark plugs heat range chart high melting point and great strength, along very. Car is Losing Coolant but no Leak: what should you do because they a... The so-called deposit zone, combustion deposits start to form on the threads, Which improves durability since was. Little electrode erosion,, no new deposits are formed and those existing will be unable to self-clean! Well areas before removing spark plugs are good for applications that operate mainly at low rpms maintenance... Power though can do so here relationship between the spark plugs better experience, please JavaScript! Motor as I have the high compression pistons do with engine heat correct? Which is a plug. Temperature drops into the so-called deposit zone, combustion deposits start to form on heat. Centurys worth of a full line of acdelco GM Genuine parts are true... Mean that if you dont pay attention, its very easy to install the wrong spark plug manufacturer the! Is unlikely to misfire or in this temperature range, no new deposits are formed and those will. Today in broad terms, spark plugs you get over a centurys worth of driving raises combustion and. How to fix it when you need is for an engine that is lightly or! Laws / regulations good for applications that operate mainly at low rpms that is lightly loaded cruised! Color, along with very little electrode erosion, right heat range has nothing to do with heat...
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ac delco spark plugs heat range chart