Many OEM resistance spark plug wires using carbon conductors have around 5,000 to 15,000 ohms of resistance per foot, very much within the measuring capabilities of a common analog VOM or a DVM.
Specialty racing wires with high copper content or special construction will have much lower resistance.
MSD says this:
Quote:
Heli-Core Wires (Blue):
150 - 1,200 ohms per foot
8.5mm Super Conductor (Red):
40 - 50 ohms per foot
If you do not know the specification for your wires, measure the resistance of each wire. Remember to divide the length of the wire by 12 to get a "per foot" measurement. If one wire is out of that average spec, it is at fault
Solid Core Wires: You cannot run Solid Core Spark Plug Wires with an MSD Ignition Control. Solid Core wires do not suppress any Electro Magnetic Interference (EMI) which will interfere with electronics or rev limiters on your vehicle. A suppression style or spiral wound spark plug wire MUST be used.
Some guy on LS1 says he tested various wires:
Quote:
So here's my test. All wires were tested at least 3 times to be sure I have accurate numbers here. Remember, they were all 12.5 inches long. I tested next to a radio but did not pick up any static from any of these wires.
stock LS1 6 in. - 351 ohms
Granatelli 8mm Steel Solid Core Cable - 0.1 ohms
MSD 8.5mm Super Conductor - 71.6 ohms
Accel 8.8 300+ Ferro-Spiral Race Wire - 166.1 ohms
Jacobs Electronics EnergyCore 8.5mm - 178.3 oms
Taylor Spiro Pro 8mm Silicone - 301 ohms
Mallory Pro Sidewinder 8mm Silicone Suppression Wire - 313 ohms
Moroso Blue Maz Spiral Core 8mm - 661 ohms
Magnecor KV85 Competiton 2.5mm - 2053 ohms