No. I have a 99 corolla and need to change the spark plug wires. Does size matter? It generally applies that the spark plug voltage requirement increases if the electrode gap rises and during acceleration. Yes, it does matter very much. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. Yahoo fa parte del gruppo Verizon Media. Over the years the demands on these humble wires have increased, and thus the technology wrapped into them has also advanced. Stock spark plug wires are 7mm but I want to add some color to the engine bay using colored spark plug wires. Spark plug cables can go bad without necessarily falling apart, and it's not that they will suddenly stop working when they're done. This article will help consumers make informed choices while dispelling some common misconceptions. Lower resistance means more of the ignition coils energy is going towards bridging the gap or the spark plug. As long as the the ignition phasing is correct, it does not matter which wire goes where. Answered . Now the market is flooded with options when it comes to plug wires. 6. Important, yet un-sexy. We’re here to help you make sense of the features and technology out there. Paying the Deposit does not PAY me. Unless you are going to wrap them around the car, length doesn't make that much difference in most cases. A wire with high resistance can be in the 5000 ohms per foot range for especially high-output ignition systems, whereas a low resistance performance wire could easily get double digit ohms per foot. Once you have your wire chosen, you’ll need to connection the distributor cap (or coil, for coil on plug applications) and the spark plugs. "Crossfires" from spark plug A to spark plug B. b. Diminishes spark at the time it's needed and a … The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. Like everything in life that is good, that insulation has side effects. High-temperature-rated boots might be required if you have headers or other routing that puts the sensitive wires near a strong heat source—mainly the exhaust. As far as there being more factors than the resistance, I agree. Super Max II spark plug wires have two fiberglass braid layers and an intermediate silicone-EPDM layer for extra insulation, giving them a larger diameter. That is a tough balance to strike on modern computer-heavy cars, or even racers with sensitive data logging equipment. There is more to consider though. In this, the first of a series of Spark Plug Pages, I want to discuss thread diameter and "Reach." Different brands of ignition systems require ignition wires with a set amount of OHM's of resistance per foot of length. There wasn’t even insulation. The only ones I can find are 8mm and contain silicone. Those are the four things a gasoline-fuel engine needs to run properly. Re: Spark Plug Wires location Jan 25 2017, 6:58pm That's odd I've done plugs on a few of these trucks including my 01 and the wires (always acdelco) were all the same length. This is one reason why the OE’s eventually went to coil-near-plug ignition systems to reduce the length of the spark plug wires — thus further reducing resistance. WHen replacing spark plug wires the difference in length will not affect which cylinder they are on, just as long as they are routed where they will not contact the exhaust or anything that will damage the while the vehicle is running. 2012-07-02 00:58:40 2012-07-02 00:58:40. Spark plug resistance. Coil number is under the wire boot and is hard to read without pulling coil pack. This channel is the home for all your vintage Mid-Year Corvette content. That electrical noise can wreak havoc on everything from AM radios to engine and transmission control computers. 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A “hot” spark plug lengthens the depth of the ceramic which lengthens the distance from the center electrode end of the plug to where it contacts the spark plug shell. Plug wires of larger diameter could simply have larger conductors inside the wires, but their size could also be due to other features. That hotter spark can create a more even burn of the fuel/air mixture in the cylinder, and thus, more power output from the engine. Yet again, not quite. Fuel, air, compression, and spark. I "think" it's a matter of composition/size of the wires themselves that are probably the determining factor. Most auto manufacturers suggest having new spark plugs installed about every 30,000 miles; however, spark plug longevity depends on the condition and type of spark plug. Favorite Answer. I have a 56 Sedan Deville with a 365 engine. For overall spark transfer, not necessarily. Per saperne di più su come utilizziamo i tuoi dati, consulta la nostra Informativa sulla privacy e la nostra Informativa sui cookie. Copper plugs, for example, have the shortest life, while plugs made of more advanced and durable materials can provide up to four times the life of a copper spark plug. Jump to Latest Follow ... wires 1-2 are the same length, as are 3 and 4. Does it matter which spark plug wire goes to which cylinder with a dual fire coil since they both fire at the same time? If the spark plug requirement concerning the voltage supplied by the ignition system exceeds its possibilities, there will not occur any spark jump across the spark gap. Voltage builds in a ramp regardless of how the spark is generated. The best spend of your money is to buy a wire that protects against just enough interference to keep the rest of your car functioning properly—but no more. Plug wires are often advertised by the diameter of the wire, making it easy to look at the options for plug wires and immediately think if 7mm is good, 8.8mm must be great. By reducing the resistance in the plug wires, the coil does not have to work as hard because less voltage is lost to the resistance between the coil and spark plug. The higher voltage of a coil on plug or distributor system can create enough voltage that a slightly higher resistance wire will not greatly affect spark strength, but the relatively lower output of a magneto means using a lower resistance wire is more important to ensure a hot spark from the spark plug. We use cookies to give you the best possible experience on our website. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced. Sign up for the latest automotive news and videos—in short, everything for people who love cars. A resistor spark plug will delay the time when the spark jumps. Does it really matter what brand of spark plug wires you use on your car - Answered by a verified Mechanic for Honda. Does anyone know if the 8mm wires will perform as well as the 7mm wires? That’s what a spark plug wire is—a conductor. Understanding Spark Plug Wires While spark plug wires may seem to be simple components, there is a reasonable amount of technology that goes into their design. The most common instance of radio frequency is the phenomenon that occurs when a home mechanic replaces the plug wires on a vintage car and afterwards the radio has a pinging noise whenever the driver turns on sweet tunes while the engine is running. Hey guys and gals, welcome to my YouTube channel. For stock applications, an OEM-spec wire might be best despite it having greater resistance than an aftermarket wire. Also, all the shielding inside a wire is not free. Headers are notorious for causing problems, so invest in some extra insulation to prevent your new wires from literally melting down. Spark Plug Wires. Not only did insulation join the features list for plug wires, increasing use of electronics as the decades wore on required the development of EMI and RFI suppression. Today, let’s dive into spark plug wires and the developments in technology that these simple conductors have experienced over the years. The carbon burns from the ends, and when the gap gets big enough, you see the arc emerging in the surrounding space (why folk suggested looking at it in the dark). I doubt anyone will even remember this discussion, ... but that's my next step to see if there's a difference other than the harness plug and the spark plug wire connections. If it's time for you to install spark plugs and wires, read our project guide on how to change spark plug wires. The EMI and RFI suppression keeps the electrical noise of the ignition charge moving within the wire to a minimum. At its basic level, the spark plug wire exists solely to transmit electricity from the coil or distributor to the spark plug. You absolutely can-not use solid core ignition wires with MSD ignition systems! However, thicker wires, like these Moroso Super Max II 11mm wires, can provide added RFI suppression and insulation. Spark plug wire resistance Q. That pinging noise is the radio-frequency interference from an uninsulated plug wire. Hmmm, 5 wrong answers, until this post. Spark plugs in a gasoline engine have … Spark ignition is resistive sensitive. The resistance of many wires is measured in ohms per foot. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. have DENSO spark plugs....and have heard they are the best brand...but need to replace spark plug wires, distributor cap now too and need to do it asap....so went to "O Reilley's Auto Parts" and purchased their recommended brand "Import Direct" spark plug wires and distributor cap and etc...is this a good brand or does it really not matter? Size does matter, just ask the Society of Automotive Engineers (SAE.) Those larger wires typically have a lower resistance per foot—and this, not size, is the key thing to pay attention to. Important, yet un-sexy. There’s not many technical articles about spark plug wires, and for years we’ve been relegated to finding whatever information that was out there in the form of advertisements from manufacturers or on the back of the spark plug wire box. There is more to consider though. They will intermittently stop delivering spark, making your engine miss a beat, and there's about a dozen different things that have the same symptoms. Does the wiring order matter? What happens if it is out of … Electromagnetic and radio-frequency interference can be a real pain in the butt. Taylor, Moroso and Live-Wires are the best money can buy. Ignition systems which use a magneto are often best served by the lowest resistance wire possible. It’s not a difficult process; it just takes a bit of patience and attention to detail—like any other automotive project. Attach the test light to a good engine ground. > I replaced several loose wires on my 20 years old engine > Does plug wire really go bad, other than loose connectors? Spark plug manufacturers usually spot-weld side electrodes to the plug wire, but to survive 500 miles of torture this plug has a machined one … The side effects are resistance and cost. May 25 2012, 4:15am. So if a little insulation is great, more must be better, right? Per consentire a Verizon Media e ai suoi partner di trattare i tuoi dati, seleziona 'Accetto' oppure seleziona 'Gestisci impostazioni' per ulteriori informazioni e per gestire le tue preferenze in merito, tra cui negare ai partner di Verizon Media l'autorizzazione a trattare i tuoi dati personali per i loro legittimi interessi. It's important to install spark plugs with the correct "reach," or thread length. There’s not many technical articles about spark plug wires, and for years we’ve been relegated to finding whatever information that was out there in the form of advertisements from manufacturers or on the back of the spark plug wire box. Spark plugs differ in many ways: thread diameter, reach, temperature range, and electrode design, to name just a few. Noi e i nostri partner memorizzeremo e/o accederemo ai dati sul tuo dispositivo attraverso l'uso di cookie e tecnologie simili, per mostrare annunci e contenuti personalizzati, per la misurazione di annunci e contenuti, per l'analisi dei segmenti di pubblico e per lo sviluppo dei prodotti. Spark Plug Wires. Also you need to have a plug of the same temperature, a hotter plug can cause overheating, resulting in serious internal damage, while a plug that is too cold will yeild poor performance. Like I said..its not critical. Thanks in advance for your thoughts and information. From there, the heat is dissipated into the cylinder head and eventually into the cooling system. 3,2,1,4,5,7,6,8 because the distributor seats slightly to the pass side of block center line. There is often the option to purchase pre-terminated wires, where the wires have been cut to the proper length for your application, but if you have something custom or want a cleaner appearance than factory, building your own spark plug wires might be the way to go. While it sounds pretty simple, the reality is that even vintage engines are quite picky about how each of these four items is attained. Leave the new ones on there no matter how you installed them. Often this was the spark plug wire nearest to it...which also had insulation breaking down. Does it really matter? If you are replacing … The automobile had been around for at least 50 years when my 1930 Ford Model A was built, and guess what, it’s plug wires are just straps of metal from the distributor to the plugs. Informazioni su dispositivo e connessione Internet, incluso l'indirizzo IP, Attività di navigazione e di ricerca durante l'utilizzo dei siti web e delle app di Verizon Media. Resistance (of course) ... Don't exactly what you are really trying to say..but the answer is no. Spark plugs can vary in reach from 0.095 to 2.649 cm (0.0375 to 1.043 in), such for automotive and small engine applications. in theory they go on in order of length. Plug wires are often advertised by the diameter of the wire, making it easy to look at the options for plug wires and immediately think if 7mm is good, 8.8mm must be great. Installing new plug wires is a part of most basic tune-up to-do lists, and if your favorite cars wires haven’t been changed in a decade or so it might be time for you to start shopping. 11 votes, 23 comments. 5. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. ... You need to check the coil number and choose plug wires accordingly. Spark Plug wires. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. Quality spark plug wires matter. As other answers have said, if the threaded portion is too long it can result in damage to the piston. If you have any additional tips, be sure to leave them in the comments below. The newly induced energy into the new wire does two things: a. Cheap spark-plug wires are filled with carbon-loaded silicone. Also, a marine spark plug's shell is double-dipped, zinc-chromate coated metal. Those simple conductors evolved to require insulation to shield the ever-increasing voltage from jumping to an unintended ground rather than through the spark plug. With the engine running, move the test light along the length of each spark plug wire. A conventional plug wire has a resistance of 10,000 to 15,000 ohms per foot of length--if it's measurably higher, the wire probably is bad. Puoi modificare le tue preferenze in qualsiasi momento in Le tue impostazioni per la privacy. 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Are 8mm and contain silicone consumers make informed choices while dispelling some common misconceptions to Follow. Additional tips, be sure to leave them in the butt change the plug... Wire boot and is hard to read without pulling coil pack differ in many ways: thread,... Its basic level, the spark needs of a series of spark plug 's is. Discuss thread diameter and `` reach, '' or thread length project guide on how to change the spark wires... Is great, more must be better, right dual fire coil since they fire. Sulla privacy e la nostra Informativa sulla privacy e la nostra Informativa sui cookie le tue in! Home for all your vintage Mid-Year Corvette content new wire does two things: a spark is generated from. Let ’ s dive into spark plug is the home for all vintage... 'S time for you to install spark plugs with the engine bay using colored spark plug Pages, agree! Sensitive data logging equipment `` reach. wires from literally melting down ignition coils is.