Spark plug wires can’t add horsepower (despite what some may claim), but they can adversely affect your vehicle’s performance. However, the resistance must not be enough to hinder the spark from traveling to the spark plug. of misfire, thanks Joe. Copper Spark Plugs vs. Iridium and Platinum: Understand for Top Performance. The challenge is to get the maximum amount of this charge to the plugs without creating interference (EMI or RFI) for nearby electrical components. For that reason, solid core wires have lower resistance than other wires to get maximum energy to the plugs. Comparably, MSD’s Street Fire wires give users a spark-friendly 500 ohms/ft of resistance. This reduces the amount of electrical charge that can be delivered to the spark plug. Save my name, email, and website in this browser for the next time I comment. The wires feature heavy-duty 8.8mm oversized silicone jackets and 150 ohm/ft of resistance. 421 SBC stroker race engine These could be nylon or Kevlar. 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. The center core of OEM-type spark plug wires is made of a carbon fiber that helps minimize radio frequency interference (RFI). 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. thanks, i didt know about the disadvantage of carbon cores. Testing a spark plug wire’s resistance is fairly straightforward, but you will need a test meter with an ohm setting. We’ve got iridium spark plugs for a wide range of American and import makes including the NGK Iridium IX Spark Plug, Denso Iridium Power Spark Plug, and Bosch OE Specialty Iridium Spark Plug. Thanks. A helically wound conductor suppresses EMI. However, I still get a lot of reader inquiries about which spark plug wire should be used for a certain application. …is mounted on the RIGHT side of the engine* Must use with graphite style spark plug wires # ABC4309, or # (FDS4315 NAA up) do not use copper or stainless spark plug wires… We’ll aim to remedy that here by covering the basics of choosing high performance spark wires for your ride. Required fields are marked *. While silicone spark plug wire boots are fine in most applications, if you’re running headers, you have surely experienced burned boots. The latest, technically advanced ignition systems have created a situation where plug wire selection can optimize engine performance or even hinder power output. 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Typically, the conductor core in plug wires has carbon-impregnated fibers. However, today’s ignitions are far superior to those offered in the ’50s, ’60s, ’70s, and even ’80s. However, the outer jacket is more than just good looks. Next, measure the length of the wire you want to test and make a note of the length (measured in feet). Chevy Hardcore NEWSLETTER - SIGN UP FREE! Simply stated, these larger wires offer a thicker layer of insulation to stop any chances of EMI/RFI that may affect performance. Resistance: Rated in ohms-per-foot, resistance is the ignition wire’s tendency to resist the flow of the electric current. 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. Again, carbon core wires typically need replaced more often than the other styles, and worn wires can cause misfires, reduce acceleration, and leak voltage. However, spiral core is a great choice for the vast majority of enthusiasts nowadays. “One; the wires should be routed away from heat, unless an additional protective heat sleeving is placed over the wire. That’s why I decided to have a confab with the plug wire professionals at Accel Performance and MSD Performance. “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. 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. 4.4 out of 5 stars 9. 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. 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. They claim to offer 5-15 hp with just a wire change.$200+ a set, Your email address will not be published. Spark plug wires are commonly direct-fit to work on a specific application. When that is taking place, an electromagnetic field is created. The basic function of a spark plug wire is to conduct spark energy from the ignition source, whether it be a distributor or coil pack, to the spark plugs. In EDM applications, the electrical current tends to concentrate at sharp edges and corners. 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. There are also a variety of color options and plug boot configurations (straight, 45-degree, 90-degree, etc.) We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Appropriately named, Moroso Ultra 40 Race Wires produce a class leading 40 ohms of resistance, allowing maximum energy to the plugs. Copper is a great electrical conductor with low resistance.. Solid Core: Solid core spark plug wires typically utilize stainless steel or copper, which conducts electrical current very well. This winding is typically an alloy made of copper, nickel, and/or tin. The center electrode of this type of spark plug is a copper core coated with a nickel alloy. Plus, they have to survive in the high temperatures and extreme environment of the engine compartment. Others are designed to suppress EMI. Must use with graphite style spark plug wires # JDS4335 do not use copper or stainless spark plug wires do not use copper or stainless spark plug wires * Must use with ABC348 high voltage coil and ABC366 resistor. Most of the best speaker wires are made from copper, since copper is a wonderful conductor of electricity. The Accel Extreme 9000 Ceramic Spark Plug Wire Set and the Superstock 4000 Series are some of the best spark plugs out there on the market, devised to achieve some amazing results for the ignition. Reeves says the single- and double-platinum were employed strictly as a measure to increase the durability of the spark plugs. Before carbon-core wires were introduced, solid-core wires were the norm. Both of these materials conduct electrical current very well. As with everything, there is a delicate balance. This makes installation very easy; however, you can also find universal spark plug wires that can be cut to fit. This is important to be aware of because each field can create interference with more sensitive electronic components. Graphite will conduct electricity, but copper conducts electricity much better, making it more efficient to use. Under the outer layer is a braided material — usually nylon or fiberglass — which adds strength and helps minimize EMI. So which spark plug wire style is right for your vehicle? Joined: Oct 13, 2008 Posts: 616. Automotive manufacturers typically use wires that create roughly 3,500 to 5,000 ohm/ft of resistance. January 27, 2012. All rights reserved. A copper plug is least likely to do this. The boots are available in straight, 45-, or 90-degree configurations. In a performance application, less is more. A smaller electrode also reduces flame quenching. If you’re looking for hard-to-find plugs for older European imports, the Champion Iridium Spark Plug covers many brands back to 1946 as well as a wider range of makes from the mid-1980s on. 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