Spark plug wires
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Pit Crew
Joined: May 2006
Posts: 163
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From: CA
Spark plug wires
Anyone know what the normal resistance range for our spark plug wires?
I was told it should be between 10K to 15K ohms. I bought a new NGK set and tested them. They measured 2.4K (short), 3.58K (med) and 3.89K (long). I also tested the old wire set (Denso) and they were 4.98K (short), 7.69K (med) and 7.98K (long). All of them well below the 10-15K ohms range, do I just have wires that are just duds? I am more surprised by the brand new NGK wire set though.
I was told it should be between 10K to 15K ohms. I bought a new NGK set and tested them. They measured 2.4K (short), 3.58K (med) and 3.89K (long). I also tested the old wire set (Denso) and they were 4.98K (short), 7.69K (med) and 7.98K (long). All of them well below the 10-15K ohms range, do I just have wires that are just duds? I am more surprised by the brand new NGK wire set though.
Pole Position
Joined: Nov 2018
Posts: 2,083
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From: CA
I'm running the NGK wires with no problems. Don't over think it 
. I'd expect to see less resistance through them anyway. Better quality. Only certain vehicles I know of actually need to be in a resistance range. In general the lower the resistance the better. That's part of what you pay for with expensive race spec wires. I am actually going to be moving to a set of Magnecor 8.5mm for my NA-T build. I have to do what I can in all areas to support 800whp and want to get the best performance possible.
. I'd expect to see less resistance through them anyway. Better quality. Only certain vehicles I know of actually need to be in a resistance range. In general the lower the resistance the better. That's part of what you pay for with expensive race spec wires. I am actually going to be moving to a set of Magnecor 8.5mm for my NA-T build. I have to do what I can in all areas to support 800whp and want to get the best performance possible.
Thread Starter
Pit Crew
Joined: May 2006
Posts: 163
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From: CA
Thanks, wasn't sure what to make of the lower resistance. I got the range from this article:
https://my.prostreetonline.com/2016/...ignition-coil/
I am replacing valve cover gaskets and thought might as well do the plugs & wires at the same time.
https://my.prostreetonline.com/2016/...ignition-coil/
I am replacing valve cover gaskets and thought might as well do the plugs & wires at the same time.
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