plug wires

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can anyone verify the resistance of a copper core plug wire. as of now i've got some carbon moroso wires. both sides show about 5 Ω. everyone says a norton likes a copper core with points but i've yet to find any specs on that. i imagine it should be close to nothing. but would 5 ohms make that much of a difference?
 

L.A.B.

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GavinJuice said:
can anyone verify the resistance of a copper core plug wire.

I just tested a 12 ft length of copper core plug wire and there was no measurable resistance shown on my analogue meter.


GavinJuice said:
as of now i've got some carbon moroso wires. both sides show about 5 Ù.

Carbon wires generally have a built-in resistance of around 1-2 kOhms (1000-2000 Ohms) per foot depending on the type.


GavinJuice said:
everyone says a norton likes a copper core with points but i've yet to find any specs on that.

I've not heard that either, only that copper core wire is recommended by Boyer Bransden to be used with their ignition systems.


GavinJuice said:
i imagine it should be close to nothing. but would 5 ohms make that much of a difference?

5 Ohms should not make any difference whatsoever, or do you mean 5 kOhms?
As a healthy ignition system should work with 5 kOhm resistance and it would have originally had 5 kOhm suppression caps fitted to copper wires when it left the factory as a legal RFI requirement.

What about the plug caps & plugs?
Are yours suppressed or unsuppressed type as you would need to include them with any Ohms value of the wire?
If you have carbon wires then I guess they are an unsuppressed type permanently fixed to the wire?

Digital equipment like an electronic regulators or digital ignition systems (doesn't apply if you've got points) often require 5 kOhm suppressed wires or caps or plugs to be fitted for them to function correctly.
 
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