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Magnecor plug leads and NGK Spark Plugs

'Magnecor Plug wires', Not only the best peformance, but the 'Best Value, by far!

Magnacor plug leads

Magnecor Race Wires, both Magnecor KV85 Competition (8.5mm) and R-100 Racing (10mm) Ignition Cables, are used extensively throughout the world by leading racers and performance-minded street vehicle owners to maximize the efficiency of their vehicle's ignition system. Magnecor Race Wires are the only ignition wires that can carry the full output of racing ignition systems while providing superior EMI suppression for electronically managed engines and superior heat resistance.

Magnecor Plug wires

Magnecor Race Wires are used on many serious race engines, such as current engines used in the USA in NASCAR, Winston Cup, Grand National and Super Truck series, SCCA (including successful factory vehicles and other series winners), IMSA, NHRA etc. Magnecor Race Wires are also used on many race engines competing worldwide; Australians would be interested to know most successful Touring Cars, including most cars running at Bathurst, use Magnecor Race Wires. Magnecor Race Wires have been successfully run on many 5,000+HP Top Fuel engines. However, unlike all other performance wires, Magnecor Race Wires can be used to improve ANY street engine ignition performance — because they provide EMI suppression!


Magnecor Race Wires' superior heat resistance also makes them ideal for use in the extreme heat experienced by commercial vehicles, industrial vehicles, industrial engines and generators, military vehicles, and motorhomes. Marine engines can also benefit from Magnecor Race Wires' superior RFI suppression and water sealing abilities.


Unlike the majority of ignition wire brands that have proliferated in the performance market in recent years, Magnecor Race Wires are not just branded, cheaply constructed, generic spiral conductor ignition wires that most performance parts promoters like to include in their product lines to sell through speed shops and mass-merchandisers in the USA.

We now have a full range of Magnecor V8 Rover leads in stock (models 1969 - 2000). Both the superlative KV85 range, and the less expensive 8mm Street wires. An essential addition to any performance or efficiency seeking engine.

Magnecor Plug leads (œPOA) Our choice for all V8s

See our igniton (and LPG dual timing Spark Amps)

Need a custom set of Magnecor plug leads - Click here for the Magnecor form.

Warning!! - For those more technically minded - (This might not make sense to anyone :-)

'Low-resistance' conductors are an easy sell as most people associate all ignition wire conductors with original equipment, and replacement ignition wire carbon conductors (which progressively fail as a result of microscopic carbon granules burning away and thus reducing the spark energy to the spark plugs) with solid wire zero-resistance conductors that were used by racers with no need for suppression. Consumers are easily led into believing that if a spiral conductor's resistance is almost zero, its performance must be similar to that of the solid metal conductor all race cars once used. HOWEVER, NOTHING IS FURTHER FROM THE TRUTH!

What is not generally understood (or is ignored) is, that as a result of the laws of electricity, the potential 45,000 plus volts (with alternating current characteristics) from the ignition coil (a pulse type transformer) does not flow through the entire length of fine wire used for a spiral conductor like the 1 volt DC voltage from a test ohmmeter, but flows in a magnetic field surrounding the outermost surface of the spiral windings (skin effect). The same skin effect applies equally to the same pulsating flow of current passing through carbon and solid metal conductors.

A spiral conductor with a low electrical resistance measured by an ohmmeter indicates, in reality, nothing other than less of the expensive fine wire is used for the conductor windings - a construction which cannot achieve a clean and efficient current flow through the magnetic field surrounding the windings, resulting in poor suppression for RFI and EMI.

Of course, ignition wire manufacturers save a considerable amount in manufacturing costs by using less fine wire, less exotic winding machinery and less expertise to make low-resistance spiral conductors. As an incentive, they find a lucrative market amongst performance parts marketers who advertise their branded ignition wires as having 'low-resistance' conductors, despite the fact that such 'low-resistance' contributes nothing to make spiral ignition wires perform better, and RFI and EMI suppression is compromised.

In recent years, most ignition wire manufacturers, to temporarily improve their spiral conductor's suppression, have resorted to coating excessively spaced spiral windings, most of which are crudely wound around strands of fiberglass or Kevlar, with a heavy layer of high-resistance carbon impregnated conductive latex or silicone compound. This type of construction hides the conductive coating's high resistance when the overall conductor is measured with a test ohmmeter, which only measures the lower resistance of the sparse spirally wound wire (the path of least resistance) under the conductive coating and ignores the high resistance of the outermost conductive coating in which the spark energy actually travels. The conductive coating is rarely shown or mentioned in advertisement illustrations.

The suppression achieved by this practice of coating the windings is only temporary, as the spark current is forced to travel through the outermost high-resistance conductive coating in the same manner the spark current travels through the outermost high-resistance conductive coating of a carbon conductor used in most original equipment and stock replacement wires.

In effect (when new), a coated 'low-resistance' spiral conductor's true performance is identical to that of a high-resistance carbon conductor.

Unfortunately, and particularly with the use of high-output ignition, the outermost high-resistance conductive coating over spiral windings acting as the conductor will fail from burn out in the same manner as carbon conductors, and although in most cases the spiral conductor will not cease to conduct like a high-resistance carbon conductor, any RFI or EMI suppression will be lost as a consequence of the coating burning out. The worst interference will come from the so-called 'super conductors' that are wound with copper (alloy) wire.

However, despite the shortcomings of 'low-resistance' spiral conductor ignition wires, these wires work satisfactorily on older production vehicles and race vehicles that do not rely on electronic engine management systems, or use on-board electronics effected by EMI – although, with the lowest-resistance conductor wires, don't expect much RFI suppression on the AM band in poor reception areas.

Some European and Japanese original equipment and replacement ignition wires, including Bougicord and NGK, do have spiral conductors that provide good suppression – usually none of these wires are promoted as having low-resistance conductors – however, none are ideal for competition use as their conductors and pin-type terminations are fragile, and are known to rarely last as long as good carbon conductor ignition wires.

To be effective in carrying the full output from the ignition system, and suppressing RFI and EMI in particular, spiral conductors need windings that are microscopically close to one another and precisely spaced and free from conductive coatings. To be more effective, the windings need to be wound over a core of magnetic material — a method too costly for wires sold through mass-merchandisers and most speed shops, who purchase only the cheapest (to them) and most heavily promoted products.

links to other component pages
[ V8 engine and component information and pricing ] [ Carburation & fuel Injection ] [ Back to:Electrical ]
[ Transmission 2wd & 4wd ] [ Suspension, Handling,Tyres, Wheels & Brakes ] [ Stainless & Mildsteel Exhaust systems ]

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Prices & stock are subject to change without notice. Information and advice, as always, is free.

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