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. They claim to offer 5-15 hp with just a wire change.$200+ a set, Your email address will not be published. In the early 1990’s, DIS “wasted spark” ignition systems were created, … The true difference between these sets of plug wires lay in the resistance of the wires. It offers excellent RFI suppression but also creates more resistance than other styles. 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. :confused: BlazerLT. Spiral wound wires are a mainstay on any high-performance ignition system. informative and straight to the point. “Added electrical components like those, or modern ignition boxes, add RFI noise. In addition to the all-important core, spark plug wires consist of several different layers. I'd just look up which ones came stock … 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. 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 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. The latest, technically advanced ignition systems have created a situation where plug wire selection can optimize engine performance or even hinder power output. Wires with higher ohms-per-foot ratings will allow less current to flow from the spark source to the plugs. In a single 12 inch length of Super Conductor Wire there is only 40 - 50 ohms of resistance! 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. These early, fully mechanical distributor systems had their shortcomings. Unfortunately, solid core offers very little EMI/RFI suppression, so they’re not suited for electronic ignition systems or vehicles with sensitive communications equipment. / Does 8mm spark plug wires make a difference than 7mm on a dodge ram 1500 v6 . Iridium spark plugs are made with a hard metal. MSD 6AL off-road ignition Appropriately named, Moroso Ultra 40 Race Wires produce a class leading 40 ohms of resistance, allowing maximum energy to the plugs. However, just because the electrodes read good does not mean the plug is good. Unfortunately, they have no RFI or EMI suppression capability. 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. This is for a demolition derby application. Currently using Taylor plug wires. Thoughts on Granatelli spark plug wires. Automotive manufacturers typically use wires that create roughly 3,500 to 5,000 ohm/ft of 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.”. But spiral core wires boast low resistance while maintaining great Electro-Magnetic Interference (EMI) suppression. “The difference between 7mm, 8mm, 8.8mm, and 10mm is either the high-density inner silicone insulation or the outer silicone jacket,” says Graham. 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. The latest advancements in plug wire construction have nearly rendered solid-core wires obsolete. The differences between spark plugs. “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. 3 Answers. In the long run, isn’t that just as important? of misfire, thanks Joe. thanks. 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. and electrical stresses. The thick insulation prevents arcing from the cable to an earthed engine component. This is usually made of EPDM rubber or silicone. However, the resistance must not be enough to hinder the spark from traveling to the spark plug. Spark ignition is resistive sensitive. There are also a variety of color options and plug boot configurations (straight, 45-degree, 90-degree, etc.) 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. So which spark plug wire style is right for your vehicle? The low resistance results in less loss in spark energy so more reaches the spark plug. As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. For overall spark transfer, not necessarily. What is the difference between 7mm spark plug wires and 8mm? “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. is suitalble, coil is stnadard, I am having a problem with car, mwhistle, Sep 10, 2018 SHARE POST #19 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.) 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. Spark plug wires/ ignition cables are the wires that go from to coil/coils or distributor cap to the spark plugs. This reduced resistance allows the engine to start easily and even produce a smoother idle than an OEM-replacement wire can. to fit your particular needs. A resistor spark plug will delay the time when the spark jumps. For example, each individual coil may be connected to two, three or four control wires. The purpose of this resistance in the plug wires is to help suppress electrical interference with other electronic components in the car. 03-13-2005, 05:18 AM. Plug wires are consumables and considered part of a routine maintenance schedule. That helps check the box to use a spiral core for a lot of customers. The advantage to the larger O.D is to protect the core and insulate it from arcing through the jacketing.”. Spark plug wires can’t add horsepower (despite what some may claim), but they can adversely affect your vehicle’s performance. © 2017 Power Automedia. Source(s): Me. This makes installation very easy; however, you can also find universal spark plug wires that can be cut to fit. Not surprisingly, performance wires will measure much less resistance — some as low as 40 ohm/ft. “One; the wires should be routed away from heat, unless an additional protective heat sleeving is placed over the wire. Thanks. Question type: General. Anonymous. The wires feature heavy-duty 8.8mm oversized silicone jackets and 150 ohm/ft of resistance. 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 science of creating and conducting an electrical charge and sending it to a spark plug is nothing new. However, the outer jacket is more than just good looks. An underhood comparison of a variety of vehicles, however, reveals there are subtle differences among coils. All rights reserved. There, a rotating disc attached to the distributor shaft “distributes” the power to each of the spark plug wires. In addition, carbon core breaks down more quickly than other materials so they require relatively frequent replacement. These have an iridium tip welded on to give the best fuel economy. You’ll see a lot of diameter measurements thrown around regarding plug wires. No difference. 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). The use of terminal studs as a connection type is most common in motorcycle and power sports applications. It’s a fact of life for hot rodders — or at least it was. No real difference on a stock vehicle. As the spark current travels through the plug wire, it has a certain amount of resistance working against that current. Typically, the conductor core in plug wires has carbon-impregnated fibers. Report; Follow ; Asked by GuruZX877 Oct 25, 2017 at 07:24 PM about the 1997 Dodge RAM 1500 WS RWD. This is important to be aware of because each field can create interference with more sensitive electronic components. MSD’s Street Fire spark plug wires feature 500 ohm/foot of resistance for improved spark delivery and power. This site uses Akismet to reduce spam. The challenge is to get the maximum amount of this charge to the plugs without creating interference (EMI or RFI) for nearby electrical components. Jay S. 1 decade ago. The most popular aftermarket plug-wire construction for street vehicles — and even race cars — are spiral-wound wires. The number one job of any spark plug wire is to transfer an electrical charge from your ignition to your spark plugs. 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. One end connects to the wire, bringing the spark. 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