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Posted

Depends on the scale.

.013" is a good average diameter to use in 1/24-1/25 scale.

Figure lotsa plug wires today are about 8mm in OD.  That's .318". Divide by 25 for 1/25 scale.

You get .0126", very close to .013".

Posted

in my experience, older points type ignitions didn't use 8mm wire unless or until high performance ignition systems were used.

most stock ignition systems before electronic/HEI came along were closer to 7mm spark plug wires.

but I usually go with what "looks" right based on the scale or size of the engine.

Posted

in my experience, older points type ignitions didn't use 8mm wire unless or until high performance ignition systems were used.

most stock ignition systems before electronic/HEI came along were closer to 7mm spark plug wires.

but I usually go with what "looks" right based on the scale or size of the engine.

You're absolutely correct about earlier plug wires being smaller diameters. 

:D  Which is why I said ".013" is a good average diameter to use in 1/24-1/25 scale."

A lot of people apparently think scale garden-hose "looks right", and I know how people hate to measure anything and divide to get scale-correct, so i just said "average" 'cause it looks kinda OK sorta for everything...sorta.   :D

Some old "plug wires" were simple copper strips. 

And check out this old T-model. Barbed wire. :o

Image result for antique spark plug wires

Posted

You're absolutely correct about earlier plug wires being smaller diameters. 

:D  Which is why I said ".013" is a good average diameter to use in 1/24-1/25 scale."

A lot of people apparently think scale garden-hose "looks right", and I know how people hate to measure anything and divide to get scale-correct, so i just said "average" 'cause it looks kinda OK sorta for everything...sorta.   :D

Some old "plug wires" were simple copper strips. 

And check out this old T-model. Barbed wire. :o

Image result for antique spark plug wires

well, that's one way to discourage anyone from touching the plug wires.  ;)

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