MSD Spark Plug Wires : User Manual

11

M S D I G N I T I O N • www.m s di gni ti o n. com • (9 15) 857 -5 2 00 • FAX ( 915 ) 85 7 -3 344

The Super Conductor Wire has less than 50 ohms per

foot, the lowest available in a helically wound wire. A spe-

cial copper-alloy conductor is wrapped very tightly around

a ferro-magnetic impregnated center core which gives the

wire extremely high EMI suppression. This design ensures

that optimum spark energy will reach the spark plugs while

EMI noise is held at a minimum.

NOTE: Solid Core spark plug wires cannot be used with any

MSD Ignition controls or Pro Mags.

Just like tires, oil or spark plugs, the spark plug wires

are a maintenance item. Service of the wires hinges on

your application and ignition control. If you have a 6AL

Ignition and use the car as a daily driver, the wires will

last for thousands of miles. Conversely, if you are racing a

high compression engine with nitrous and an MSD 10, the

wires should be inspected and even replaced during the

race season. When checking wires, closely inspect for signs

of burning or arc-through. Look at the boots for signs of

cracking or burning and using an ohm meter to check resis-

tance of each wire is a good idea. Also, keep in mind that

the coil wire is delivering eight times the spark so it should

be checked closely. When checking resistance of the wires

note that the longer wires will have more total resistance,

but their values should average out. If one wire stands out

among the others, it should be replaced.

Spark Plug Wires

Spark plug wires have two main objectives; transfer the

spark energy to the plugs and suppress the Electro Magnetic

Interference (EMI) that the spark voltage projects. Too high

of resistance decreases the spark energy, yet too low of resis-

tance may generate too much EMI noise which will interfere

with the operation of other electronics on the vehicle. A

good quality wire, proper routing and routine inspection

are all important in getting the most performance out of

your ignition system.

MSD offers two great spark plug wires; Heli-Core Wire

and the 8.5mm Super Conductor Wire. The Heli-Core Wires

are a performance wire upgrade for any car or truck. For

serious performance, the 8.5mm Super Conductor Wire is

the wire of choice. Both sets of wires feature a conductor

that is helically wound around a special center core that

is designed to suppress, or choke, EMI. Helically wound,

sometimes called spiral core, must be used with an MSD

Ignition Control. Solid core wires do not suppress EMI

so there could be interference with the ignition or other

electronics on the vehicle.

Spark Plug Wires and Spark Plugs

pn9615_wiring_diagram_print_vers11 11 8/18/2009 9:31:27 AM