According to the first link, from Popular Mechanics, spark plug wires are supposed to have 10,000 to 15,000 ohms per foot. With their ultra-low resistance of 0.9 kΩ per meter, Power Cables realize spark energy of 130%. Most would agree that the lower the better right? 11) In general, the secondary spark line occurs at a lower kV with a rich air/fuel ratio. Reeves says the single- and double-platinum were employed strictly as a measure to increase the durability of the spark plugs. Spark plug wires can’t add horsepower (despite what some may claim), but they can adversely affect your vehicle’s performance. Air-Fuel mixture temperature. Our phone lines are closing at 4 pm CST today to allow our employees extra time with their loved ones. 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. The highest resistance values I got was 11.76k ohms The lowest was 7.3k ohms. The wire resistance is part of the ignition circuit. So 2,400-3,000 with my 2 foot wires. Sudden acceleration for starting out fits these conditions, so higher voltage is required then and misfire occurs more easily. A Taylor ThunderVolt plug wire could easily test at around 40 ohms per foot, which means reduced-resistance and more energy applied to the spark plug. The Spark Burn Time is measured in milliseconds (ms) that's how short really is. Unlike most wires, plug wires are normally designed to have a lot of resistance.The resistance helps reduce radio static that the ignition system generates. Over time spark plug wires will wear out, causing various engine operation issues such as hard starting, misfires, rough idling, poor performance, poor fuel economy, and improper combustion burn. Planning on making my own with the ever-dry kits from Andy Berbaum. Spark Burn Time Duration. Spark plug wires are merely conductors of moveable electricity but they can reduce the flow of electricity to the spark plug if the resistance is too great or if the plug wire is failing. Order your e-gift cards by 3 pm CST for delivery today. However be very careful, as too low means that the inductive reactance will also be low and not provide sufficient RFI suppression. Moroso Ultra-40 Racing Spark Plug Wires, Low Resistance, Straight made by Moroso, for as low as $97.99. An Ohm meter, which is part of a multimeter, can only check a spark plug for a short circuit or a breakdown of insulation resistance. The Mercedes 560SEL Operating at Low Temperatures - Duration: ... Building Your Own Custom Spark Plug Wires - Pep Boys - … Plug Wires (or Spark Plug Wires, Ignition wires) connect the spark plugs to the distributor or ignition coils. (This resistance is one eighteenth of the 16 kΩ per meter figure for general use cables.) The biggest " resistance" (capacitance) is the plug gap. No resistance specs or chart is needed to figure out the correct spark plug wire resistance on any set of spark plug wires. How to Test a Spark Plug Wire: Video tutorial on how to test a spark plug wires. Dispelling The Spark Plug Myths. And a larger gap will put a bigger spark into the chamber all else= and functional. Close inspection of the boots and terminals should also be checked. Never pull on the wire. Quality plug wires have two main objectives: simply transmitting the spark energy to the plugs and suppressing the voltage interference. Spark plug wires deliver thousands of volts (up to 50,000 or more) to the spark plugs. Find Spark Plug Wire Sets 0 ohms/ft. Spark Plug Wire tips page. Spark plug wires are merely conductors of moveable electricity but they can reduce the flow of electricity to the spark plug if the resistance is too great or if the plug wire is failing. All colors—blue, red, green, yellow, orange, including neon tones—are available in most diameters, including 7mm, 8mm, 10mm, and more. I personally got around 2,000 to 3,000 for each wire when I measured (Assuming that 2.0 when the meter is set to 20K is 2,000 Ohms). The ECM looks at the resistance of the spark in it's gap, and can tell how rich/lean a cylinder is running. 9) A secondary spark line sloping downward from left to right indicates high resistance in a spark plug or spark plug wire. 8-11 12-15 19-22 12-15 20-23 14-17 Note: If anti-seize compound is used, … Find the spark plug wires and sets you need for low resistance and minimum spark loss at Summit Racing. Spark plugs in automobiles generally have a gap between 0.6 and 1.8 mm (0.024 and 0.071 in). They are a resistor style plug. Is 6,000 ohms of resistance too high for good spark? Jump to Latest Follow ... OK, so could (too) low resistance wires explain why I'm getting a slight pinging under load? How to Test Spark Plug Wires. According to the second link, from David Kucharczyk, silicon wires have 10^9 to 10^11 ohms per meter. Spark Plug Wire Resistance and get Free Shipping on Orders Over $99 at Summit Racing! Similar to checking spark plug wires, the coil wire may be checked for resistance using an Ohm meter. The compression pressure is higher for low speed and high load. I was going to replace them anyway with some magnecors, which according to magnecor have about twice the resistance/length as the wires I found in my second hand lantra. The increased spark energy improves the starting characteristics, acceleration and power, and has excellent effects on idling stability, combustion and so on. To carry such large voltages, plug wires need to have some basic physical characteristics. Also, try not to wiggle the boot as this can actually spread the terminal causing it to be a loose fit when it's reinstalled. I have been looking at some bulk plug wire, braided 7mm. A Spark event doesnt need low resistance to deliver a high energy pulse. Spark plug wires can easily be visually inspected for tears, burns or black spots that may pinpoint a voltage leak. 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. The length of time the Spark arc is maintained across the spark plug electrodes is called Burn Time. Tempest’s “fired in resistor” nominal value is 2500, +/- about 1000 ohms. A spark plug wire is a basic but critical engine component. 10) A secondary spark line sloping upward from left to right indicates a lean air/fuel mixture. Those mag wires will prob just cause trouble elsewhere. I just found this stating that the wires should be 1,200-1,500 ohms per foot. Spark plug wire resistance. ! First twist the boot to break it free from the spark plug, then grasp the boot and pull with a steady motion. I've been testing out my Motorcraft 8mm spark plug wires (the ones that got replaced by a set of Ford Racing 9mm plug wires) but I don't know what the limit is to determine if a wire is good or bad. Came across a web site where he stated you have to use "Low Resistance" plug wires because the older cars use about 20000 volts as opposed to the newer cars which use upwards 30000 volts. Ask your spark plug sales man for the “as manufactured” resistance of his new spark plugs. You can also measure the resistance of each spark plug wire, but like coils, values may vary between wire brands. Factory plugs are copper for a reason. MSD Spark Plug Wires With its extremely low-resistance combined with the ability to suppress Electro Magnetic Interference the MSD 8.5mm Super Conductor Spark Plug wire is the ultimate performance wire! Joe went on to explain that plug wires were “Consumables” and they would get brittle and crack with age. Spa… Spark Plugs Technical Information Thread size 10mm With Gasket 12mm With Gasket 14mm With Gasket 14mm With Tapered Seat 18mm With Gasket 18mm With Tapered Seat Torque ft.-lbs. Spark Plug Basics. It carries the high voltage (30k to 50k volts) produced by the ignition coil to the spark plug. Fine-wire plugs were designed for use in late model engines that are tasked with the seemingly ridiculous goal of lasting for 100,000 miles in a production engine. A good spark plug should show an open circuit between the center electrode and the tip. I tested a defective Ford Racing wire (the #2 plug wire had a conductor Try to pull up as straight as possible. The absolute values for new plugs aren’t too important as long as they are fairly low; say less than 4000 ohms and remain reasonably stable throughout the plug’s life. If you are shopping around for spark plug wires, you have probably been bombarded with two heavily advertised features. This basic guide is designed to assist the technician, hobbyist or race technician in understanding, using and troubleshooting spark plugs. Low Resistance. The gap may require adjustment from the out-of-the-box gap. Ensuring that the secondary side ignition components are in tip-top shape will certainly help keep you're voltage on the right path, free from misfire or crossfire, and you'll feel like you just had a refresher course in Ohm's law to boot. Joe went on to explain that plug wires were “Consumables” and they would get brittle and crack with age. 1 sec = 1000 ms. The first is low resistance. Going to Platinum totally changes the resistance, i.e. Any resistance at all would mean the plug is bad. A spark plug gap gauge is a disc with a sloping edge, or with round wires of precise diameters Whether you’re seeking replacement wires or aftermarket performance wires, we have everything you need. 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