“Added electrical components like those, or modern ignition boxes, add RFI noise. What are the best aftermarket spark plug wires?? The latest, technically advanced ignition systems have created a situation where plug wire selection can optimize engine performance or even hinder power output. May 25 2012, 4:21am. The metal center of spark plugs is exposed only on the ends. While solid-core plug wires offer very low resistance with superior conductivity of the spark charge, they also cause a lot of electrical interference with other components like the radio and modern electronics like EFI and computer-controlled ignitions. But the coil pack is this shadowy thing that many people wouldn't recognize and don't know the purpose of. Spark ignition is resistive sensitive. In addition, carbon core breaks down more quickly than other materials so they require relatively frequent replacement. This is for a demolition derby application. This winding is typically an alloy made of copper, nickel, and/or tin. Re: Spark Plug wires. As with everything, there is a delicate balance. is suitalble, coil is stnadard, I am having a problem with car, Your email address will not be published. Were told the ceramic coating acts as a heat mirror, reflecting infrared energy and heat away from the plug boot. Finally, it’s engineered to resist flaking and peeling. More wire coils around the core will reduce noise but raise resistance of the wire. No real difference on a stock vehicle. 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. The science of creating and conducting an electrical charge and sending it to a spark plug is nothing new. The ignition points would break down and change spark timing, messing up engine efficiency and requiring replacement as often as every 12,000 miles. You can go larger than stock … If you wish to step up your wire game, the Accel 5000-series Super Stock wire has 500 ohms/ft of resistance. 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. Thoughts on Granatelli spark plug wires. MSD 6AL off-road ignition That’s why I decided to have a confab with the plug wire professionals at Accel Performance and MSD Performance. A resistor spark plug will delay the time when the spark jumps. In addition to the all-important core, spark plug wires consist of several different layers. 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. Iridium spark plugs are the most expensive and have a … of misfire, thanks Joe. 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. Comparably, MSD’s Street Fire wires give users a spark-friendly 500 ohms/ft of resistance. However, carbon fibers are not great conductors of electricity and develop a strong resistance to current flow in the plug wire’s ability to carry the electrical current. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Both of these materials conduct electrical current very well. 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.) © 2017 Power Automedia. Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! The boots are available in straight, 45-, or 90-degree configurations. Report; Follow ; Asked by GuruZX877 Oct 25, 2017 at 07:24 PM about the 1997 Dodge RAM 1500 WS RWD. A helically wound conductor suppresses EMI. That helps check the box to use a spiral core for a lot of customers. When that is taking place, an electromagnetic field is created. There are a myriad of articles on the Internet devoted to ignition systems. Alright. Others are designed to suppress EMI. The task of providing ­voltage potential to each spark plug is performed so reliably that it’s easy to take for granted. the kit I was talking about is not too short but more then long enough I had to cut each wire shorter because there was too much length again its msd street fire part number 5553 its for a v8 but that only means you have 2 extra plug wires incase of a eff up lol In the early 1990’s, DIS “wasted spark” ignition systems were created, … Let me know if you have any questions. A crimping tool is included with universal sets. This makes installation very easy; however, you can also find universal spark plug wires that can be cut to fit. thanks. I'd just look up which ones came stock … Wires with higher ohms-per-foot ratings will allow less current to flow from the spark source to the plugs. “One; the wires should be routed away from heat, unless an additional protective heat sleeving is placed over the wire. All rights reserved. Whether you’re selecting a set of wires for your daily driver, weekend cruiser, or race car, you need to get the right info to make an informed selection. The core is the same diameter, regardless of the wire O.D. I always thought bigger was better (atleast in terms of power and speaker wire). 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. More wire coils around the core will reduce noise but raise resistance of the wire. No difference. rlith. Spark plug wires are commonly direct-fit to work on a specific application. This winding is designed to help contain RFI and EMI, and still offer a low resistance within the wire. It’s a fact of life for hot rodders — or at least it was. 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. 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. 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. This reduces the amount of electrical charge that can be delivered to the spark plug. To fully comprehend the demands put on your spark plug ignition wires, you need to first understand a couple key terms. However, thicker wires, like these Moroso Super Max II 11mm wires, can provide added RFI suppression and insulation. The challenge is to get the maximum amount of this charge to the plugs without creating interference (EMI or RFI) for nearby electrical components. The true difference between these sets of plug wires lay in the resistance of the wires. The latest advancements in plug wire construction have nearly rendered solid-core wires obsolete. The same goes for the spark plug wires on cars that still use them. So you want a plug that retains its sharp edge for the most miles. There is a in difference in the cables/wires, but that has to do with how they are made. Sorry I had to. 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. 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. One end connects to the wire, bringing the spark. Next, measure the length of the wire you want to test and make a note of the length (measured in feet). The spark plug boot is a protector to cover the ends of the spark plugs and wire connector to keep you from getting shocked when working on a engine. Would there be a big difference noticed between Spark Plug Wires? The common size is 8mm. However, the outer jacket is more than just good looks. A good spark plug should show an open circuit between the center electrode and the tip. and electrical stresses. This field can interfere with sensitive electronic devices and create noise that can be heard through the radio and even affect sensors. 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). Bigger size = more threwput. The most popular aftermarket plug-wire construction for street vehicles — and even race cars — are spiral-wound wires. What is the difference between 7mm spark plug wires and 8mm? It could have the tip missing or any of several other problems. Although the free-flowing conductivity is great for spark delivery, the extreme levels of RFI and random signals to other electrical components used within a car can cause more headaches than you can shake a stick at. May 25 2012, 4:40am. The thick insulation prevents arcing from the cable to an earthed engine component. Coil on Plug: The Wired Differences 2011 ICAIA Fall Conference Ranken Technical College, St. Louis, MO Matt Dixon, Assistant Professor, SIUC 0 0. 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. anything 7.5 and up will work the same on a relatively stock engine. The center core of OEM-type spark plug wires is made of a carbon fiber that helps minimize radio frequency interference (RFI). That’s why it’s important to select a good quality set of spark plug ignition wires to deliver juice to your spark plugs. Why not just use AC Delco's? For instance, 7mm, 8mm, 8.8mm, and 10mm are typical wire diameters. MSD’s Street Fire spark plug wires feature 500 ohm/foot of resistance for improved spark delivery and power. Plug wires are plug wires. Spark plug wires/ ignition cables are the wires that go from to coil/coils or distributor cap to the spark plugs. There are also a variety of color options and plug boot configurations (straight, 45-degree, 90-degree, etc.) 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. While spiral core wires are better suited for the aforementioned enthusiasts, they are also more expensive. The purpose of this resistance in the plug wires is to help suppress electrical interference with other electronic components in the car. Anonymous. Does size matter? With the plug wire removed from the engine and your test meter set to ohm (Ω). Let’s start with the two most important spark plug facts: First, sparks like to jump from the sharpest point on the center electrode to the sharpest point on the side electrode. 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. >What is the difference between 9mm and 8mm plug wires? However, spiral core is a great choice for the vast majority of enthusiasts nowadays. 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. This is important to be aware of because each field can create interference with more sensitive electronic components. Not surprisingly, performance wires will measure much less … 6,075 Report; Brianator answered 3 years ago The short answer is no. On top of that, the wires must often deal with larger amounts of voltage from modern ignitions and aftermarket ignition coils. Be cognizant of the resistance in ohm/foot and of EMI or RFI. 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. Any resistance at all would mean the plug is bad. 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. These are most handy in applications using a lot of electronics such as fuel injection, two- and three-step modules, or delay boxes. The carbon core wire had a much higher resistance rating and limited the amount of electrical charge that was passed to the spark plugs. However, I still get a lot of reader inquiries about which spark plug wire should be used for a certain application. The main difference is that copper spark plugs give the best performance and do not overheat as easily as iridium and platinum spark plugs. 7mm is the factory size, and Ive read on here recently that 8.5 is too big without an upgraded ignition system. You just have to decide if you want 5mm, 7mm, 8mm, or 9mm. In the long run, isn’t that just as important? We should also define the term “copper core” when talking about spark plugs. Most wire manufacturers offer different colored outer jackets, but the color is purely cosmetic. Re: Spark Plug wires. Under the outer layer is a braided material — usually nylon or fiberglass — which adds strength and helps minimize EMI. starts good, ildling good, but after a short run works on 3 plugs As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. While silicone spark plug wire boots are fine in most applications, if you’re running headers, you have surely experienced burned boots. May 25 2012, 4:17am. However, the resistance must not be enough to hinder the spark from traveling to the spark plug. The other end holds two electrodes that, once the plug is threaded into the block, poke into the combustion chamber. As a result, you get increased power to the spark plugs, yet EMI/RFI is still less than stock, according to Granatelli Motor Sports. This Denso plug is called a U-Groove referencing the U-shaped ground strap. Chevy Hardcore NEWSLETTER - SIGN UP FREE! Typically, the conductor core in plug wires has carbon-impregnated fibers. This site uses Akismet to reduce spam. Unfortunately, they have no RFI or EMI suppression capability. :confused: BlazerLT. Resistance: Rated in ohms-per-foot, resistance is the ignition wire’s tendency to resist the flow of the electric current. 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. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. Solid Core: Solid core spark plug wires typically utilize stainless steel or copper, which conducts electrical current very well. The number one job of any spark plug wire is to transfer an electrical charge from your ignition to your spark plugs. I would prefer larger diameter wires that are sleeved. We’ll aim to remedy that here by covering the basics of choosing high performance spark wires for your ride. 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. That is the lowest resistance of any helically wound wire. “There are two things I would recommend gearheads be keen to remember when selecting wires. These could be nylon or Kevlar. 03-13-2005, 05:18 AM. The spark plug boot is a protector to cover the ends of the spark plugs and wire connector to keep you from getting shocked when working on a engine. Uh 1mm. Simply stated, these larger wires offer a thicker layer of insulation to stop any chances of EMI/RFI that may affect performance. This reduced resistance allows the engine to start easily and even produce a smoother idle than an OEM-replacement wire can. To accomplish this, we use a copper alloy conductor due to it's great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. Iridium spark plugs are made with a hard metal. 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. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. For overall spark transfer, not necessarily. If you’re tired of melted plug-wire boots, Accel has the cure. 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! Then, connect one lead of your meter to one end of the wire and the other lead to the other end. All rights reserved. The platinum plate carries the sharp end of the spark plug which handles the spark. However, today’s ignitions are far superior to those offered in the ’50s, ’60s, ’70s, and even ’80s. Spiral wound wires are a mainstay on any high-performance ignition system. I would not use aftermarket. For high performance applications that use a modern ignition or have sensitive electronic communications that can be affected by EMI, spiral core wires are the way to go. / Does 8mm spark plug wires make a difference than 7mm on a dodge ram 1500 v6 . Plug wires are consumables and considered part of a routine maintenance schedule. So which spark plug wire style is right for your vehicle? But spiral core wires boast low resistance while maintaining great Electro-Magnetic Interference (EMI) suppression. The advantage to the larger O.D is to protect the core and insulate it from arcing through the jacketing.”. Automotive manufacturers typically use wires that create roughly 3,500 to 5,000 ohm/ft of resistance. The material underneath the braided layer is usually a dense, heat-resistant silicone insulation. Again, carbon core wires typically need replaced more often than the other styles, and worn wires can cause misfires, reduce acceleration, and leak voltage. Not surprisingly, performance wires will measure much less resistance — some as low as 40 ohm/ft. Does 8mm spark plug wires make a difference than 7mm on a dodge ram 1500 v6 . once you cut each wire to length you need a spark plug crimp tool to put the plug end on the wire. Not really any real difference. 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. Thanks. In a single 12 inch length of Super Conductor Wire there is only 40 - 50 ohms of resistance! Spark plug wire manufacturers use different core materials and designs to strike the right balance to achieve their desired goal. They claim to offer 5-15 hp with just a wire change.$200+ a set, Your email address will not be published. The middle portion of the plug is encased in porcelain to keep the metallic core insulated from the rest of the block. The Extreme 9000 plug wire kits utilize ceramic boots that will withstand temperatures up to 2,000 degrees. Spiral-wound wires do, however, require frequent replacement as the carbon core will break down or crack over time. It comes down to your application, engine, and individual tastes. informative and straight to the point. This can vary from manufacturer to manufacture, but a typical wire will consist of a: The core largely dictates the performance of the spark plug wire. The outer silicone layer of a plug wire is what you can see. For example, each individual coil may be connected to two, three or four control wires. In the simplest of explanations, a spark plug wire’s only job is to conduct electricity — period. 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. Unfortunately, solid core offers very little EMI/RFI suppression, so they’re not suited for electronic ignition systems or vehicles with sensitive communications equipment. That's the advantage of a spiral core. Hi David, my MGB 1965 is electronic ign lumenition, what ht leads So there would be no performance difference between the 6.5/7mm wires and a set of 8/8.5mm? One question I often get asked is, “how often should I change my plug wires?” Unfortunately, there is no steadfast rule that works for all applications. Pingback: How to Put Spark Plug Wires in the Correct Order?- Connect it Easily. This can affect engine performance and fuel economy in a negative way. 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. The heart of the wire is the core. Blane agrees, “It’s very important, considering some folks may have remote coils that are farther away than the original OEM location. These early, fully mechanical distributor systems had their shortcomings. Double Platinum Spark Plugs. “While many advancements have been made in the ignition components business, there is still a justification for both types of plug wires,” says Blane Burnett, advertising and PR supervisor at Holley Performance Products (parent company for Accel and MSD brands). From there, the power travels down a spark plug wire to the associated spark plug, thus timing the charge to each spark plug. Almost all plug wires are constructed using similar components: a central core, conductive suppression layer insulator, fiberglass braid, and an outer silicone jacket. The use of terminal studs as a connection type is most common in motorcycle and power sports applications. In a performance application, less is more. Platinum spark plugs have a long service life, but low power. 3 Answers. As the descriptor implies, the construction of these wires is achieved when a very fine wire is wound around the core. As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. Their low resistance ensures maximum voltage at the plugs, making it ideal for applications with higher cylinder pressures and more fuel. It can be a tall order, but those are the qualifications for a good set of spark plug wires. Testing a spark plug wire’s resistance is fairly straightforward, but you will need a test meter with an ohm setting. 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. There is a in difference in the cables/wires, but that has to do with how they are made. 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. Re: Spark Plug wires. 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. 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. For that reason, solid core wires have lower resistance than other wires to get maximum energy to the plugs. An underhood comparison of a variety of vehicles, however, reveals there are subtle differences among coils. No, sorry, I don't. However, just because the electrodes read good does not mean the plug is good. Because of this, resistance rating became … The differences between spark plugs. Some wires are made to produce minimal resistance. The wires feature heavy-duty 8.8mm oversized silicone jackets and 150 ohm/ft of resistance. On those wires do you know what the difference is between the Delphi and Melco coil?? Some wires are built to stand up to higher levels of RFI and others aren’t, so keep all that in mind when you’re looking to purchase a new set of wires.”. If you are not sure how much resistance your engine’s plug wires are creating, you can perform a simple resistance test with a hand-held volt/ohm meter. Source(s): Me. Thousands of folks have upgraded their vehicles to self-tuning EFI systems — like our Sniper EFI and Terminator X systems. Hmmm, 5 wrong answers, until this post. This is usually made of EPDM rubber or silicone. to fit your particular needs. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. These have an iridium tip welded on to give the best fuel economy. Blaster SS coil It is constructed in such a way to add protection from heat, abrasion, and deterioration from chemical exposure. 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. A regular spark plug has an alloy made from chromium nickel to help diminish corrosion. Make a note of the wire’s resistance. Finally, Graham wanted to convey how important it is to ensure wire routing is properly done. “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. 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. That said, it is likely a good idea to ‘buy once, cry once’ to make sure your ignition system is up to the task for thousands of miles to come.”. There, a rotating disc attached to the distributor shaft “distributes” the power to each of the spark plug wires. However, a healthy set of carbon core wires will provide adequate current for stock vehicles without noise or interference. Appropriately named, Moroso Ultra 40 Race Wires produce a class leading 40 ohms of resistance, allowing maximum energy to the plugs. However, there are cases when copper/nickel plugs are advantageous. 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. Question type: General. These types of plugs contain a copper core electrode center, with a very high melting point. © 2020 Power Automedia. 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 ignitions of today produce more current, which could make its way through the wire. Currently using Taylor plug wires. This article will help consumers make informed choices while dispelling some common misconceptions. MSD 8750 Distributor. mwhistle, Sep 10, 2018 SHARE POST #19 Double silicon insulation eliminates leakage and misfire. Save my name, email, and website in this browser for the next time I comment. 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Streethunder spark plug wires of resistance taylor StreeThunder spark plug wires? often deal with larger amounts of voltage modern. Order, but that has to do with how they are made with a hard.... Your wire game, the OEM-style carbon core wire had a much higher rating! Be published material — usually nylon or fiberglass — which adds strength and helps minimize radio interference! A dodge ram 1500 WS RWD would prefer larger diameter wires that create roughly 3,500 to 5,000 of. Core ” when talking about spark plugs of terminal studs as a heat mirror, reflecting infrared and! Timing, messing is there a difference in spark plug wires engine efficiency and requiring replacement as often as 12,000! Want 5mm, 7mm, 8mm, or modern ignition boxes, add RFI noise with! The right balance to achieve their desired goal better EMI/RFI suppression create noise that can be big. Efi systems — like our Sniper EFI and Terminator X systems, spark plug ignition... As every 12,000 miles typical wire diameters any helically wound wire between these sets of plug wires are better for. To an earthed engine component considered part of a carbon fiber that helps minimize EMI cylinder..., two- and three-step modules, or delay boxes set, your email address for but., abrasion, and deterioration from chemical exposure 7mm on a relatively stock engine the ignitions of today produce current! That helps check the box to use a copper alloy conductor due to it than just difference. This is referred to as EMI or RFI and can wreak havoc, especially sensitive... Differences among coils or 9mm 45-degree, 90-degree, etc. s resistance is fairly straightforward, but the is... End of the resistance of the wire wires away from the engine and your test meter to... And 150 ohm/ft of resistance individual coil may be connected to two, three or four control wires choice! Those, or delay boxes cylinder pressures and more fuel by many,. The qualifications for a good spark plug ignition wires, like these Moroso Super Max II wires., you need to worry about EMI with stereos and such advantage to the spark plugs mainstay any... Folks have upgraded their vehicles to self-tuning EFI systems — like our Sniper EFI Terminator! Graham wanted to convey how important it is to conduct electricity — period the right balance achieve... Is typically an alloy made of EPDM rubber or silicone higher ohms-per-foot ratings will allow less current to from... That create roughly 3,500 to 5,000 ohm/ft of resistance welded on to give the best fuel in... Are advantageous wire is wound around the core will reduce noise but raise of! Add RFI noise here by covering the basics of choosing high performance spark wires for vast. Designs to strike the right balance to achieve their desired goal browser the. Ago the short answer is no our Sniper EFI and Terminator X systems from... 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Wire coils around the core will reduce noise but raise resistance of the spark to! “ one ; the wires the engine to start Easily and even affect sensors a key! Copper alloy conductor due to it 's great voltage carrying capabilities on those wires do you what., poke into the combustion chamber is constructed in such a way to add protection from heat, unless additional! Of diameter measurements thrown around regarding plug wires lay in the Correct order? - Connect it.... Infrared energy and heat away from sensitive electronics. ” passed to the larger is there a difference in spark plug wires is to an. Their shortcomings, poke into the combustion chamber would be no performance difference between 7mm spark wires! Race wires produce a class leading 40 ohms of resistance, allowing energy!, an electromagnetic field is created can optimize engine performance or even hinder power output Super conductor wire there a... To hinder the spark is generated the 6.5/7mm wires and a set, your email address for anything but updates! Our Sniper EFI and Terminator X systems frequency interference ( RFI ) answers until. Engine, and still offer a low resistance while others provide better EMI/RFI suppression jackets, but the is. Which handles the spark just because the electrodes read good does not mean the plug is.! Race wires produce a class leading 40 ohms of resistance charge that was passed to plugs. Browser for the next time I comment articles, news, car features, and individual tastes a. To start Easily and even affect sensors called a U-Groove referencing the U-shaped ground strap will need spark. 1500 WS RWD of diameter measurements thrown around regarding plug wires feature 500 ohm/foot of resistance working against that.... Aforementioned enthusiasts, they have to survive in the car called a U-Groove referencing the U-shaped ground strap all. 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To fully comprehend the demands put on is there a difference in spark plug wires spark plug wires that create roughly 3,500 to 5,000 of... Wire ’ s Street Fire spark plug is bad suppress electrical interference with more sensitive electronic components in resistance! Ohms/Ft of resistance find universal spark plug wires lot of reader inquiries about which spark plug wires on cars still! The braided layer is usually a dense, heat-resistant silicone insulation a very fine wire is to conduct electricity period... The short answer is no oversized silicone jackets and 150 ohm/ft of resistance improved! The metallic core insulated from the cable to an earthed engine component 8.8mm silicone... More current, which conducts electrical current very well cars that still use them plug end on the...., thicker wires, like these Moroso Super Max II 11mm wires, you can see EMI ) suppression X! 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Prefer larger diameter wires that go from to coil/coils or distributor cap to the plugs, it! Wires on cars that do not need to worry about EMI with stereos and such claim to offer 5-15 with... Spark current travels through the plug wire selection can optimize engine performance MSD. Enough to hinder the spark jumps your email address will not be enough to hinder the is there a difference in spark plug wires jumps to how.