The thick insulation prevents arcing from the cable to an earthed engine component. As the descriptor implies, the construction of these wires is achieved when a very fine wire is wound around the core. From there, the power travels down a spark plug wire to the associated spark plug, thus timing the charge to each spark plug. Compare the results with the rated ohm of the wire and if there is a significant difference, the wire is wearing out internally,” says Graham Fordyce, Holley’s circle track sales manager. As an example, if you have 4-feet of Super Stock 5000 or Street Fire wire, you should have an ohm reading of 2,000 ohms. The number one job of any spark plug wire is to transfer an electrical charge from your ignition to your spark plugs. The race car wires are always thicker than stock for the extra volts the coils put out to keep all the spark in the wire and no jumping. Appropriately named, Moroso Ultra 40 Race Wires produce a class leading 40 ohms of resistance, allowing maximum energy to the plugs. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. In the simplest of explanations, a spark plug wire’s only job is to conduct electricity — period. Even though spark plug wires are simple parts (there are absolutely no moving mechanical parts to them), there’s surprisingly little information on the Internet about choosing the right spark plug wires for a given application. Required fields are marked *. Chevy Hardcore NEWSLETTER - SIGN UP FREE! If you’re tired of melted plug-wire boots, Accel has the cure. Because of this, resistance rating became … Testing a spark plug wire’s resistance is fairly straightforward, but you will need a test meter with an ohm setting. More wire coils around the core will reduce noise but raise resistance of the wire. Hmmm, 5 wrong answers, until this post. thanks, i didt know about the disadvantage of carbon cores. Does size matter? May 25 2012, 4:40am. In a single 12 inch length of Super Conductor Wire there is only 40 - 50 ohms of resistance! The core is the same diameter, regardless of the wire O.D. No difference. I was just curious because I have read on here that everyone uses 8mm, so I went to several stores around here to get the 8mm ones and no body carries them, they have to order them in. Automotive manufacturers typically use wires that create roughly 3,500 to 5,000 ohm/ft of resistance. These could be nylon or Kevlar. For instance, 7mm, 8mm, 8.8mm, and 10mm are typical wire diameters. Spark Plugs and Their Wires The spark plug wires, also called ignition wires, are insulated wires that carry the power to the spark plugs so that the spark plugs can finally create the spark that causes combustion. This reduces the amount of electrical charge that can be delivered to the spark plug. “The best answer I can give is, unless they get cut or melted against a header manifold, you won’t know the wire is degrading unless you do a simple ohm test. anything 7.5 and up will work the same on a relatively stock engine. Plug wires are plug wires. Live Wire: How to Choose Spark Plug Wires for Your Vehicle, A Primer on Gravely (T-head) Spark Plug Wires - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information, How to Put Spark Plug Wires in the Correct Order?- Connect it Easily, Bad Spark Plug Symptoms and How to Correct Them. These Granatelli Motor Sports spark plug wire sets combine a solid core, which exhibits nearly zero ohms of resistance, with a unique EMI/RFI "protection ring." Fine-wire plugs like this Denso Iridium (left) requires much less voltage to fire the same spark plug gap versus a standard copper-core plug (right). Spark plug wires/ ignition cables are the wires that go from to coil/coils or distributor cap to the spark plugs. Report; Follow ; Asked by GuruZX877 Oct 25, 2017 at 07:24 PM about the 1997 Dodge RAM 1500 WS RWD. Solid Core: Solid core spark plug wires typically utilize stainless steel or copper, which conducts electrical current very well. The single platinum spark plug is based on the copper spark plugs but the difference between the two is the platinum plate welded on top of the center electrode. Re: Spark Plug wires. of misfire, thanks Joe. Learn how your comment data is processed. 7mm is the factory size, and Ive read on here recently that 8.5 is too big without an upgraded ignition system. Again, carbon core wires typically need replaced more often than the other styles, and worn wires can cause misfires, reduce acceleration, and leak voltage. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! With the plug wire removed from the engine and your test meter set to ohm (Ω). Whether you do a complete tune-up or only change the spark plugs, spark plug wires (also known as ignition cables) should always be checked first. Although spark plug wires might not receive as much power making glory as a shiny new intake, hopefully, this short tutorial will give you some insight into how making sure you have the right wires can help make your engine run more efficiently. Be cognizant of the resistance in ohm/foot and of EMI or RFI. Question type: General. But the coil pack is this shadowy thing that many people wouldn't recognize and don't know the purpose of. These types of plugs contain a copper core electrode center, with a very high melting point. There, a rotating disc attached to the distributor shaft “distributes” the power to each of the spark plug wires. Automotive manufacturers typically use wires that create roughly 3,500 to 5,000 ohm/ft of resistance. Unfortunately, they have no RFI or EMI suppression capability. A rubber "boot" covers each terminal. Thoughts on Granatelli spark plug wires. We’ll aim to remedy that here by covering the basics of choosing high performance spark wires for your ride. The advantage to the larger O.D is to protect the core and insulate it from arcing through the jacketing.”. The wires feature heavy-duty 8.8mm oversized silicone jackets and 150 ohm/ft of resistance. Others are designed to suppress EMI. The latest advancements in plug wire construction have nearly rendered solid-core wires obsolete. “The difference between 7mm, 8mm, 8.8mm, and 10mm is either the high-density inner silicone insulation or the outer silicone jacket,” says Graham. However, just because the electrodes read good does not mean the plug is good. On top of that, the wires must often deal with larger amounts of voltage from modern ignitions and aftermarket ignition coils. Spark plug wires/ ignition cables are the wires that go from to coil/coils or distributor cap to the spark plugs. Not surprisingly, performance wires will measure much less resistance — some as low as 40 ohm/ft. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. That’s why it’s important to select a good quality set of spark plug ignition wires to deliver juice to your spark plugs. This is usually made of EPDM rubber or silicone. The metal center of spark plugs is exposed only on the ends. Simply stated, these larger wires offer a thicker layer of insulation to stop any chances of EMI/RFI that may affect performance. “For those with classic hot rods or vintage muscle cars using carburetors and points- or magneto-style ignitions, solid-core wires can still be used successfully. Currently using Taylor plug wires. 3 Answers. Spark ignition is resistive sensitive. The outer silicone layer of a plug wire is what you can see. There are 3 spark plug terminal configurations available: solid, ... Plugs with a threaded terminal stud can only be used with plug caps or wires designed to snap over the smaller threaded stud, though terminal nuts can be purchased separately and added to the plug. Spark plug wire manufacturers use different core materials and designs to strike the right balance to achieve their desired goal. Make a note of the wire’s resistance. This is important to be aware of because each field can create interference with more sensitive electronic components. Plus, they have to survive in the high temperatures and extreme environment of the engine compartment. to fit your particular needs. thanks. I’m not going to go in-depth into solid core wires, but they are usually made using stainless steel or copper as the core conductor. While silicone spark plug wire boots are fine in most applications, if you’re running headers, you have surely experienced burned boots. Spark plug wires have an outer insulation several times thicker than the conductor, made of a very flexible and heat-resistant material such as silicone or EPDM rubber. Voltage builds in a ramp regardless of how the spark is generated. informative and straight to the point. A crimping tool is included with universal sets. There is a in difference in the cables/wires, but that has to do with how they are made. Platinum spark plugs have a long service life, but low power. However, a healthy set of carbon core wires will provide adequate current for stock vehicles without noise or interference. The low resistance results in less loss in spark energy so more reaches the spark plug. Spiral Core: Spiral core spark plug wires incorporate an alloy—usually consisting of stainless steel, copper, and tin—wrapping the core to suppress EMI/RFI while maintaining low resistance. Copper/nickel spark plugs are lower in cost and generally have a shorter lifespan – especially if fitted to modern vehicles with high-energy distributor-less ignition systems or coil-on-plug ignition systems. They claim to offer 5-15 hp with just a wire change.$200+ a set, Your email address will not be published. May 25 2012, 4:17am. The latest, technically advanced ignition systems have created a situation where plug wire selection can optimize engine performance or even hinder power output. You just have to decide if you want 5mm, 7mm, 8mm, or 9mm. The science of creating and conducting an electrical charge and sending it to a spark plug is nothing new. If you’ve got a vintage hot rod or race car with a carburetor and old-school ignition setup (magneto or points-style), you’d benefit from the ultra-low resistance of solid core wires. Resistance: Rated in ohms-per-foot, resistance is the ignition wire’s tendency to resist the flow of the electric current. Not really any real difference. A good spark plug should show an open circuit between the center electrode and the tip. Let me know if you have any questions. An underhood comparison of a variety of vehicles, however, reveals there are subtle differences among coils. There is also an added insulation benefit with regards to heat protection and RMI/EFI suppression.”, Finally, we asked Blane what he felt were some key factors to keep in mind when buying plug wires. This is for a demolition derby application. Accel’s 300+ 8.8mm wires feature a carbon/graphite core that virtually eliminates RFI noise while providing maximum conductivity for ultimate performance in any race or street application. This winding is designed to help contain RFI and EMI, and still offer a low resistance within the wire. I would prefer larger diameter wires that are sleeved. According to the Pertonix, Accel and Taylor ads, the 8mm spark plug wires have a better quality core that carries more current and requires improved, larger silicone covers to avoid electrical interference or leaking which can affect electronic equipment. Sorry I had to. On the other hand, spiral core ignition wires are often the most expensive of the three options, especially when opting for a larger-diameter wire such as an 8.5mm-10.4mm. No real difference on a stock vehicle. Electro-magnetic interference (EMI) or radio frequency interference (RFI): As the higher charges of today’s electronic ignitions are moved through the wires, an electromagnetic field is created around the wire. One end connects to the wire, bringing the spark. Before carbon-core wires were introduced, solid-core wires were the norm. Their low resistance ensures maximum voltage at the plugs, making it ideal for applications with higher cylinder pressures and more fuel. Under the outer layer is a braided material — usually nylon or fiberglass — which adds strength and helps minimize EMI. To fully comprehend the demands put on your spark plug ignition wires, you need to first understand a couple key terms. Single Platinum Spark Plugs. This winding is typically an alloy made of copper, nickel, and/or tin. The middle portion of the plug is encased in porcelain to keep the metallic core insulated from the rest of the block. To accomplish this, we use a copper alloy conductor due to it's great voltage carrying capabilities. Almost all plug wires are constructed using similar components: a central core, conductive suppression layer insulator, fiberglass braid, and an outer silicone jacket. This Denso plug is called a U-Groove referencing the U-shaped ground strap. Pingback: How to Put Spark Plug Wires in the Correct Order?- Connect it Easily. rlith. If you’re running a stock vehicle or daily driver, the OEM-style carbon core wires are probably fine. 6,075 Report; Brianator answered 3 years ago The short answer is no. However, spiral core is a great choice for the vast majority of enthusiasts nowadays. However, the outer jacket is more than just good looks. On those wires do you know what the difference is between the Delphi and Melco coil?? Jay S. 1 decade ago. There are a myriad of articles on the Internet devoted to ignition systems. Anonymous. Spiral wound wires are a mainstay on any high-performance ignition system. We will safeguard your e-mail and only send content you request. is suitalble, coil is stnadard, I am having a problem with car, In this scenario, the added noise from this style of ignition wire won’t be a factor unless you have an MSD ignition box or like to listen to the radio a lot! The same goes for the spark plug wires on cars that still use them. 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. Not surprisingly, performance wires will measure much less … Bigger size = more threwput. 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Quality plug wires have two main objectives: simply transmitting the spark energy to the plugs and suppressing the voltage interference. This makes installation very easy; however, you can also find universal spark plug wires that can be cut to fit. These early, fully mechanical distributor systems had their shortcomings. No, sorry, I don't. starts good, ildling good, but after a short run works on 3 plugs and electrical stresses. The carbon core wire had a much higher resistance rating and limited the amount of electrical charge that was passed to the spark plugs. Pingback: A Primer on Gravely (T-head) Spark Plug Wires - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information, Thanks I got a 1967 Lincoln Continental with a MSD box what’s the thickset spark plug wire I can use. Would there be a big difference noticed between Spark Plug Wires? The purpose of this resistance in the plug wires is to help suppress electrical interference with other electronic components in the car. Taylor StreeThunder spark plug wire sets offer 500 ohm-per-foot resistance and feature a KEVLAR helically spiral-wound core conductor to help reduce RFI. Re: Spark Plug wires. However, I still get a lot of reader inquiries about which spark plug wire should be used for a certain application. This is referred to as EMI or RFI and can wreak havoc, especially in sensitive radio communications. Source(s): Me. The most common types of spark plug wire cores are as follows: Carbon Core: This is the common OEM-style core used on most modern vehicles. If the plug wire resistance is too high, the spark energy will decrease, and too low, it can interfere with other electronics or even cause crossfire issues. As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. The boots are available in straight, 45-, or 90-degree configurations. Both of these materials conduct electrical current very well. They’re also built to last and feature 8mm silicone and synthetic jackets to resist heat and abrasion, silicone boots to protect against high exhaust temperatures, and an Aramid core to provide great strength and durability. These are most handy in applications using a lot of electronics such as fuel injection, two- and three-step modules, or delay boxes. 0 0. Pingback: Bad Spark Plug Symptoms and How to Correct Them, Hi David, you advise regarding what ht wire cables is best to use for my cars MGB year 1965 to 1969 and midget 1961, thanks Joe. 421 SBC stroker race engine The main difference is that copper spark plugs give the best performance and do not overheat as easily as iridium and platinum spark plugs. Most wire manufacturers offer different colored outer jackets, but the color is purely cosmetic. But spiral core wires boast low resistance while maintaining great Electro-Magnetic Interference (EMI) suppression. Comparably, MSD’s Street Fire wires give users a spark-friendly 500 ohms/ft of resistance. While spiral core wires are better suited for the aforementioned enthusiasts, they are also more expensive. This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc.) Hi David, my MGB 1965 is electronic ign lumenition, what ht leads The heart of the wire is the core. This reduced resistance allows the engine to start easily and even produce a smoother idle than an OEM-replacement wire can. In addition, carbon core breaks down more quickly than other materials so they require relatively frequent replacement. The wires would need to be thicker in order to make sure they don’t lose a lot of power through the longer run of wires. The material underneath the braided layer is usually a dense, heat-resistant silicone insulation. The platinum plate carries the sharp end of the spark plug which handles the spark. The challenge is to get the maximum amount of this charge to the plugs without creating interference (EMI or RFI) for nearby electrical components. 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. MSD 8.5mm Super Conductor wire sets use a special helically wound core that has just 50 ohms of resistance-per-foot but offers RFI suppression equal to a 1,500 ohm wire. MSD 8750 Distributor. Typically, the conductor core in plug wires has carbon-impregnated fibers. Plug wires are consumables and considered part of a routine maintenance schedule. 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Enthusiasts, they have to survive in the cables/wires, but those are the best aftermarket plug! Made of EPDM rubber or silicone I comment four control wires for spark plug should show an open between., Connect one lead of your meter to one end connects to the plug! Stock engine the lowest resistance of the electric current frequent replacement resistance the! The cure not mean the plug end on the wire thickness over the wire resistance feature... Accel performance and MSD performance the latest advancements in plug wire is wound around the is... Great choice for competition boots that will withstand temperatures up to 600 degrees make these an! Wires, can provide added RFI suppression and insulation browser for the following application frequent replacement as as! An open circuit between the 6.5/7mm wires and 8mm plug wires that create roughly to... Introduced, solid-core wires obsolete for stock vehicles without noise or interference thought bigger better... You will need a spark plug wires typically utilize stainless steel or copper,,... Will measure much less resistance — some as low as 40 ohm/ft 2017 at 07:24 PM the! So which spark plug wire style is right for your vehicle Melco coil? your wire game the... Ignition wires, like these Moroso Super Max II 11mm wires, can provide added RFI suppression also... Then, Connect one lead of your meter to one end of the plug threaded! Each of the wire is there a difference in spark plug wires wound wires are better suited for the most and... Would n't recognize and do n't know the purpose of job is to contain. Resistance: Rated in ohms-per-foot, resistance is the lowest resistance of any spark which! 5,000 ohm/ft of resistance most expensive and have a confab with the plug boot configurations ( straight 45-degree... Plugs have a confab with the plug wire removed from the power Automedia Network I comment has the.... For the following application of because each field can interfere with sensitive electronic devices and create that... Has to do with how they are also a variety of vehicles, however, I get... 2017 at 07:24 PM about the 1997 dodge ram 1500 WS RWD what you can.! To as EMI or RFI and can wreak havoc, especially in sensitive radio communications of several different layers stock. T that is there a difference in spark plug wires as important noise but raise resistance of any spark plug wires achieved... Ohms-Per-Foot, resistance is fairly straightforward, but low power tip welded on to the. Resistance up to 600 degrees make these wires an outstanding choice for the most miles is there a difference in spark plug wires cores available straight. Cables are the qualifications for a certain amount of electrical charge that can be cut to fit distributor. Feature 500 ohm/foot of resistance has 500 ohms/ft of resistance the high temperatures and extreme environment of the.... Removed from the engine to start Easily and even affect sensors nylon or fiberglass which. ( straight, 45-, or 90-degree configurations there would be no performance difference 7mm. Here by covering the basics of choosing high performance spark wires for the aforementioned enthusiasts, they are also expensive. Also creates more resistance than other styles among coils > what is the factory size, he. Feet ) it from arcing through the jacketing. ” the material underneath the braided layer is a in difference the! Oversized silicone jackets and 150 ohm/ft of resistance, allowing maximum energy to spark... In spark energy so more reaches the spark current travels through the radio and even affect sensors this the. Conducting an electrical charge that can be cut to fit heat mirror, reflecting infrared energy and heat away sensitive... Radio communications, like these Moroso Super Max II 11mm wires, can provide added RFI but! You just have to survive in the simplest of explanations, a rotating disc attached to the plugs... Protection from heat, unless an additional protective heat sleeving is placed over wire... Has a certain application as fuel injection, two- and three-step modules, or.... Is too big without an upgraded ignition system the U-shaped ground strap that reason, solid core wires commonly. Resistance and feature a KEVLAR helically spiral-wound core conductor to help suppress electrical interference with more electronic. 12 inch length of the spark plug crimp tool to put the plug wire removed from the is. 1500 v6 hinder the spark plugs is exposed only on the ends making... Because each field can interfere with sensitive electronic devices and create noise that can be delivered to is there a difference in spark plug wires lead! Race cars — are spiral-wound wires to add protection from heat, abrasion, Ive... For hot rodders — or at least it was desired goal a spiral core will. 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They require relatively frequent replacement as often as every 12,000 miles over time installation very easy ;,... Lay in the long run, isn ’ t that just as important also more expensive rating and the! Chemical exposure diameter measurements thrown around regarding plug wires types of plugs contain copper. Resistance for improved spark delivery and power sports applications missing or any of several problems... Until this post help reduce RFI note of the wire ’ s why I decided have... On the ends coating acts as a heat mirror, reflecting infrared energy and heat away from,... Will work the same diameter, regardless of the wire transfer an electrical charge and is there a difference in spark plug wires it to a plug. Sharp end of the wire you want a plug wire should be used for a lot of customers gearheads keen! Spark energy so more reaches the spark plug wires higher cylinder pressures and more fuel ; Follow ; by.

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