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 spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. 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. Puoi modificare le tue preferenze in qualsiasi momento in Le tue impostazioni per la privacy. Often this was the spark plug wire nearest to it...which also had insulation breaking down. What happens if it is out of … Per saperne di più su come utilizziamo i tuoi dati, consulta la nostra Informativa sulla privacy e la nostra Informativa sui cookie. 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. Does it matter which spark plug wire goes to which cylinder with a dual fire coil since they both fire at the same time? The only ones I can find are 8mm and contain silicone. Hey guys and gals, welcome to my YouTube channel. 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. Spark ignition is resistive sensitive. For overall spark transfer, not necessarily. Stock spark plug wires are 7mm but I want to add some color to the engine bay using colored spark plug wires. Spark plugs differ in many ways: thread diameter, reach, temperature range, and electrode design, to name just a few. Taylor, Moroso and Live-Wires are the best money can buy. Spark plug wire resistance Q. 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. It’s not a difficult process; it just takes a bit of patience and attention to detail—like any other automotive project. 5. 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. Does size matter? Spark Plug Wires. Favorite Answer. 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. 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. As long as the the ignition phasing is correct, it does not matter which wire goes where. 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. Does the wiring order matter? Like I said..its not critical. 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. 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. 6. Voltage builds in a ramp regardless of how the spark is generated. A resistor spark plug will delay the time when the spark jumps. 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 … 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. We use cookies to give you the best possible experience on our website. 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. Sign up for the latest automotive news and videos—in short, everything for people who love cars. ... You need to check the coil number and choose plug wires accordingly. Early spark plug wires were very simple—just metal that conducted. Ignition systems which use a magneto are often best served by the lowest resistance wire possible. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. There is more to consider though. Lower resistance means more of the ignition coils energy is going towards bridging the gap or the spark plug. Yet again, not quite. Different brands of ignition systems require ignition wires with a set amount of OHM's of resistance per foot of length. Jump to Latest Follow ... wires 1-2 are the same length, as are 3 and 4. Size does matter, just ask the Society of Automotive Engineers (SAE.) 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. From there, the heat is dissipated into the cylinder head and eventually into the cooling system. Important, yet un-sexy. Important, yet un-sexy. 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