does spark plug wire length matter

While it sounds pretty simple, the reality is that even vintage engines are quite picky about how each of these four items is attained. Yet again, not quite. For stock applications, an OEM-spec wire might be best despite it having greater resistance than an aftermarket wire. Does anyone know if the 8mm wires will perform as well as the 7mm wires? 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. 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. Hmmm, 5 wrong answers, until this post. 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 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. That’s what a spark plug wire is—a conductor. As far as there being more factors than the resistance, I agree. Stock spark plug wires are 7mm but I want to add some color to the engine bay using colored spark plug wires. 11 votes, 23 comments. Plug wires of larger diameter could simply have larger conductors inside the wires, but their size could also be due to other features. 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. Today, let’s dive into spark plug wires and the developments in technology that these simple conductors have experienced over the years. Now the market is flooded with options when it comes to plug wires. I "think" it's a matter of composition/size of the wires themselves that are probably the determining factor. This channel is the home for all your vintage Mid-Year Corvette content. Those larger wires typically have a lower resistance per foot—and this, not size, is the key thing to pay attention to. That is a tough balance to strike on modern computer-heavy cars, or even racers with sensitive data logging equipment. Unless you are going to wrap them around the car, length doesn't make that much difference in most cases. For overall spark transfer, not necessarily. From there, the heat is dissipated into the cylinder head and eventually into the cooling system. Spark Plug Wires. That electrical noise can wreak havoc on everything from AM radios to engine and transmission control computers. The resistance of many wires is measured in ohms per foot. in theory they go on in order of length. Yahoo fa parte del gruppo Verizon Media. Attach the test light to a good engine ground. Ignition systems which use a magneto are often best served by the lowest resistance wire possible. 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. Like I said..its not critical. The newly induced energy into the new wire does two things: a. 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. It’s not a difficult process; it just takes a bit of patience and attention to detail—like any other automotive project. 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. Spark plugs differ in many ways: thread diameter, reach, temperature range, and electrode design, to name just a few. 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. Does it really matter? > 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 only ones I can find are 8mm and contain silicone. 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. 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. At its basic level, the spark plug wire exists solely to transmit electricity from the coil or distributor to the spark plug. We’re here to help you make sense of the features and technology out there. 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. Also, all the shielding inside a wire is not free. 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. Spark plug resistance. Also, a marine spark plug's shell is double-dipped, zinc-chromate coated metal. There is more to consider though. 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. If the spark plug wires on a vehicle are not marked before they are removed, you must know the firing order in order to know which spark plug wire goes to which cylinder. Leave the new ones on there no matter how you installed them. 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. 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. 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. Jump to Latest Follow ... wires 1-2 are the same length, as are 3 and 4. 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. A resistor spark plug will delay the time when the spark jumps. Spark plug cables can go bad without necessarily falling apart, and it's not that they will suddenly stop working when they're done. It's important to install spark plugs with the correct "reach," or thread length. Do spark plug wires lengths matter on which spark plug they go to? 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. Spark Plug wires. Cheap spark-plug wires are filled with carbon-loaded silicone. You absolutely can-not use solid core ignition wires with MSD ignition systems! 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. The side effects are resistance and cost. Resistance (of course) ... Don't exactly what you are really trying to say..but the answer is no. 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. 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 went to "O Reilley's Auto Parts" and purchased their recommended brand "Import Direct" spark plug wires and distributor cap and this a good brand or does it really not matter? As other answers have said, if the threaded portion is too long it can result in damage to the piston. Lower resistance means more of the ignition coils energy is going towards bridging the gap or the spark plug. 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. There wasn’t even insulation. 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. I have a 99 corolla and need to change the spark plug wires. Favorite Answer. 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. Puoi modificare le tue preferenze in qualsiasi momento in Le tue impostazioni per la privacy. Does the wiring order matter? If you are replacing … This article will help consumers make informed choices while dispelling some common misconceptions. ... You need to check the coil number and choose plug wires accordingly. Does size matter? The EMI and RFI suppression keeps the electrical noise of the ignition charge moving within the wire to a minimum. No. 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. Thanks in advance for your thoughts and information. Answered . Fuel, air, compression, and spark. Spark plugs in a gasoline engine have … There is more to consider though. I have a 56 Sedan Deville with a 365 engine. 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. Early spark plug wires were very simple—just metal that conducted. 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. We use cookies to give you the best possible experience on our website. Yes, it does matter very much. Electromagnetic and radio-frequency interference can be a real pain in the butt. 5. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. Like everything in life that is good, that insulation has side effects. Hey guys and gals, welcome to my YouTube channel. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. If it's time for you to install spark plugs and wires, read our project guide on how to change spark plug wires. 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. Paying the Deposit does not PAY me. 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. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. 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). 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. Often this was the spark plug wire nearest to it...which also had insulation breaking down. Over the years the demands on these humble wires have increased, and thus the technology wrapped into them has also advanced. Quality spark plug wires matter. Does it matter which spark plug wire goes to which cylinder with a dual fire coil since they both fire at the same time? May 25 2012, 4:15am. 2012-07-02 00:58:40 2012-07-02 00:58:40. 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. Those are the four things a gasoline-fuel engine needs to run properly. Spark ignition is resistive sensitive. Taylor, Moroso and Live-Wires are the best money can buy. Important, yet un-sexy. Headers are notorious for causing problems, so invest in some extra insulation to prevent your new wires from literally melting down. Per saperne di più su come utilizziamo i tuoi dati, consulta la nostra Informativa sulla privacy e la nostra Informativa sui cookie. If you have any additional tips, be sure to leave them in the comments below. 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. However, thicker wires, like these Moroso Super Max II 11mm wires, can provide added RFI suppression and insulation. Size does matter, just ask the Society of Automotive Engineers (SAE.) Coil number is under the wire boot and is hard to read without pulling coil pack. With the engine running, move the test light along the length of each spark plug wire. As long as the the ignition phasing is correct, it does not matter which wire goes where. 6. Different brands of ignition systems require ignition wires with a set amount of OHM's of resistance per foot of length. Spark Plug Wires. 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. That pinging noise is the radio-frequency interference from an uninsulated plug wire. Voltage builds in a ramp regardless of how the spark is generated. Important, yet un-sexy. Spark plug wire resistance Q. It generally applies that the spark plug voltage requirement increases if the electrode gap rises and during acceleration. What happens if it is out of … 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. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. So if a little insulation is great, more must be better, right? Does it really matter what brand of spark plug wires you use on your car - Answered by a verified Mechanic for Honda. Sign up for the latest automotive news and videos—in short, everything for people who love cars. 3,2,1,4,5,7,6,8 because the distributor seats slightly to the pass side of block center line. 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. Haul your horses with this Ferrari 412 pickup conversion, Wrenchin’ Wednesday: Efficient, no-mess grease packing, Chip Foose reimagines the iconic Jaguar E-type, Chip Foose reinvents the 1966 Ford Bronco with street-savvy style, Jeep Grand Wagoneer LS swap: Project accomplished, lessons learned, Watch this 56-mile Buick Grand National get a much-needed pampering, Reconfiguring a novelty ignition system requires a novel solution, Wrenchin’ Wednesday: Chopping and bending custom wrenches, Toyota skips the 2020 Nürburgring 24 Hours to prepare for the 2021 event. 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. "Crossfires" from spark plug A to spark plug B. b. Diminishes spark at the time it's needed and a … In this, the first of a series of Spark Plug Pages, I want to discuss thread diameter and "Reach."

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