Roush vs Ford Spark plug wires

[169mph]

My 427ir died pulling out of my neighbor. Started back up after a few tries but it was running like crap. I was able to make it back to the house. Before it died I checked each spark plug wire to be sure one didn’t pop off. I don’t recommend doing this with the engine running. The first wire I grabbed shocked the piss out of me. Long story short. I ordered new ford racing 9mm plug wires to replace the roush wires it came with. I was told the ford racing wires were a direct replacement. I checked the resistance in in both sets of wires. The old roush wires were ~400 ohms. The new ford wires measured ~4000 ohms. I thought I would see more resistance on the old wires???? Is this difference enough to worry about?

Appreciate the help. Mike

[Grubby]

4000 to 8000 ohms is normal

John

[BDR0572]

Originally Posted by 169mph

My 427ir died pulling out of my neighbor. Started back up after a few tries but it was running like crap. I was able to make it back to the house. Before it died I checked each spark plug wire to be sure one didn’t pop off. I don’t recommend doing this with the engine running. The first wire I grabbed shocked the piss out of me. Long story short. I ordered new ford racing 9mm plug wires to replace the roush wires it came with. I was told the ford racing wires were a direct replacement. I checked the resistance in in both sets of wires. The old roush wires were ~400 ohms. The new ford wires measured ~4000 ohms. I thought I would see more resistance on the old wires???? Is this difference enough to worry about?

Appreciate the help. Mike

This is ironic i just changed mine this week also, what i did not like is that the ford wires are too long on a couple of cylinders and have this ugly hump in wire routers , I am trying to find original MSD wires now they fit perfect . Dont be suprised you will have too drill wire routers (holders) for the larger wire

[hinoonaz]

I've had good luck, 20 years with Taylor. I make them up for length and routing. Choice of colors.