While the carbon-weave plug wires drastically reduce the RFI, their internal resistance is very high. All rights reserved. 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. In third place, we have Accel wires. High tension may also be referred to as HT.. Spiral core wires. © 2017 Power Automedia. A: The main reason for heat socks is to minimize heat damage to the spark-plug-wire boot from melting because of its proximity to a header tube or cast-iron manifold. A: The simple answer is no, but the reason why this occurs will require a little further information than is in this story. 4.3 out of 5 stars 47. While few enthusiasts are concerned with emissions, these results indicate an improvement in combustion efficiency. The Thundervolt and 409 lines of wires are intended for performance/racing applications where high cylinder pressures demand the most voltage from low-resistance wires. Printing on spark plug wires may include a brand name, insulation thickness (in millimeters), insulation material type, cylinder number, and conductor type (suppressor or solid wire). Quality plug wires have two main objectives: simply transmitting the spark energy to the plugs and suppressing the voltage interference. we also converted to running alchol. I also have a brand new set of red NGK plug wires (Type CR5)--purchased at the same time, from the same merchant--that appear to be for spark plugs with threaded terminals. This minimizes the hydrocarbon and carbon monoxide numbers. "High tension lead" or "cable" is also used for any electrical cable carrying a high voltage in any context. Dielectric grease can be used to improve insulation; a small amount can be applied in the inside of the rubber boot at each end of each wire to help seal out moisture. As an example of how reduced-resistance can improve performance, we tested a small-block street car with a four-gas exhaust-emissions analyzer and measured a reduction in hydrocarbon (HC) along with an improvement in CO2 levels, just by reducing the resistance in the spark plug wires. Spark Plug Wires, Pro Wire, Vertex, Solid Core, 8mm, Black, 90 Degree Plug Boots, Universal V8, Set. The thick insulation prevents arcing from the cable to an earthed engine component. Early point-type ignition systems were made to operate on and deliver correct voltages to the spark plugs through low-resistance, metallic, solid core plug wires. The goal was to eliminate radio frequency interference (RFI) that is created when using solid-core spark plug wires. Taylor Cable Products has been in the business of building spark plug wires since 1923. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Jeff Smith, a 35-year veteran of automotive journalism, comes to Power Automedia after serving as the senior technical editor at Car Craft magazine. The thicker wire diameter provides a wider margin of safety to prevent voltage leaks. As an alternative, for the budget-minded restorer we also manufacture replacement spark plug wire sets are. An Iowa native, Smith served a variety of roles at Car Craft before moving to the senior editor role at Hot Rod and Chevy High Performance, and ultimately returning to Car Craft. There are dedicated spark plug wire pliers, tools designed for removing the terminal from a spark plug without damaging it. Our silicone-blend material rates at 500-degrees F, while our EPDM synthetic rubber measures 450-degrees F. There are two primary distributor-cap plug wire connections in use today. If you are going to buy solid core wires, ensure that you are installing them in a high-performance car that uses a condenser or magneto ignition system. 30. Most Taylor wire kits come with both sets of distributor cap connectors. Spiral core spark plug wires are suitable for high-performance cars with computer controlled engines and high power ignitions. A. Reducing HC (unburned hydrocarbons) means more of the fuel is burned during idle. Many modern car engines have multiple ignition coils (one for each pair of cylinders) built into a coil pack, eliminating the need for a distributor and coil wire. We spoke with Justin Askren, a Taylor Cable technical specialist, who offered up some insight into spark plug wires. Our ThunderVolt 50 10.4mm wire is especially recommended in high-boost/extreme-cylinder-pressure applications but will work fine on any engine. Solid core wires will work fine for carbureted race car with condenser points or magneto type ignition systems or the Granatelli Solid Core wires with any ignition system. A common problem with spark plug wires is corrosion of the metal end terminals. 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. This type of wire was extensively used prior to the 60's before the introduction of car radios as standard equipment. Our exact reproduction spark plug wire sets are identical those that would have appeared on the vehicle when it left the factory. Taylor offers ceramic boot plug wires as an option when boot clearance to the headers is tight. Conductor core features Dupont Kevlar material for increased tensile strength Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion Super Conductor Spark Plug wires are available in either red or black. A stronger spark produced by reducing the plug wire resistance allows the tuner to lean the air/fuel ratio slightly because less fuel is needed to support combustion. The most common are 7mm and 8mm thicknesses, but what’s more important is the conductor. Some distributors have an ignition coil built inside them, eliminating the need for a separate coil wire, e.g. Spark plug wires … To reduce radio frequency interference (RFI) produced by the spark being radiated by the wires, which may cause malfunction of sensitive electronic systems in modern vehicles or interfere with the car radio, various means in the spark plug and associated lead have been used over time to reduce the nuisance: Placing spark plug wires back into their separators or holders during replacement helps to keep them in place despite engine vibration, extending their life. If we divide 2,000 by 2 — we get 1,000 ohms of resistance per foot. A rubber "boot" covers each terminal. Ordinary solid carbon core wires, used as original equipment on most Japanese vehicles, are not as efficient and effective. Without spark plug wires, you might as well forget about getting to work! first night out not knowing where we were on spark plugs we blew the porcelin out on a restart. Dividing 1,661 by 4.5 produces 369-ohms-per-foot resistance. This is why solid-core plug wires cannot be used with EFI engines because of the extremely high electrical noise generated by RFI. $29.30 $ 29. ", https://en.wikipedia.org/w/index.php?title=High_tension_leads&oldid=991854866, Articles needing additional references from November 2014, All articles needing additional references, Creative Commons Attribution-ShareAlike License, Resistor in spark plug with copper conductor, Compressed carbon powder as conductor in the lead to act as a resistor, Stainless steel wire wound as a coil in the lead with a resistance of about 1300 ohms/meter since 1980s. A: The most common is the male post on an HEI distributor. If this wire was only two-feet long, the total resistance would drop to under 750 ohms, so keeping the wires short is 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.