Can someone tell me why the Year One date coded ignition wires cannot be used with electronic ignition?

Thanks
Frank

I think Pertronix wants no solid core wires. that's about all I can add

These ?

https://www.lectriclimited.com/spark-plug-wire-set-215377


If so , what I can tell you is that they are CARBON CORE wires - Not that there is anything wrong with that , however I can state for a fact they are very very high ohm resistance

I had been running a set on my 383/432 Stroker for a few years now - They look great and even fit better then expected , but when it came to inconsistent RPM’s , especially higher , I was chasing my ass between ignition coils and ECU s , even fuel pressure , just couldn’t put my finger on it because it was so inconsistent

So this past month after getting my car out of storage , the first few drives on the street I just wasn’t happy

Pulled the plugs , wires , and compression test AGAIN , just looking everything over while I had time on my side

I couldn’t believe the ohm resistance on these wires when I tested them used , and even against another new set that I have here in the bag

The longest wire #7 was in excess of 20,000 Ohms brand new

OK

So last month I put on a new set of Pertronix 7mm SPIRAL CORE wires set up for a big block

I wanted to use the factory spark plug wire holders

The longest wire #7 had less then 2,000 Ohms


Beyond happy with the fit (A little long on some) , looks and PERFORMANCE difference - Night and day honestly


Picture is my old set up last year with those date coded wires



Now running a Pertronix coil that I installed last year chasing my ass , ballast resistor is bypassed on the back side - Pertronix 7mm Spark Plug wires - Same distributor - Same Mopar Chrome ECU that I have had like forever

Only thing that I changed this spring was those plug wires - Difference maker

383/432 Stroker - 75cc E Street Heads - XE275HL - Chrysler / Pertronix Ignition - 800 AVS 2

the factory used carbon core wires with electronic ignition.

So who knows what Year One is thinking.

Electronic Ignition wires where Orange correct ?

Not that it matters

However was 1972-1974 Factory Electronic Ignition Wires 7mm or 8mm ?

Thanx

You are asking the wrong guy here, I don't do resto stuff so I don't know the answers you need.

I do know the factory used carbon core wires on electronic ignitions though, because I replaced many of them over the years. Cheap radio interference suppression that still carried enough energy to fire the plug was all they cared about.

I suspect the person having the issue with the repro ones was due to poorly made wires and not that they were carbon cored.

I have my original wires from my 72 barracuda and they are 7mm.

I think the factories, all American car makers, started using resistor carbon core 7 MM spark plug wires in the mid 1960s under Federal mandate I believe .
The good Packard 440 spark plug wires where either copper core or tin plated copper wires before that
I'm sure none of the American car makers used 8MM spark plug wires on production cars.

Thanx

Good to know info

I ask this question because I'm planning on using Mopars electronic ignition kit in place of a points distributor. On Year Ones website when you look for date coded ignition wires at the end of the product description it states "not for use with electronic ignition".

Electronic ignition was an option on the barracuda in 1972. I ordered mine with it and it came with the orange wires. I think the black wires are correct only on the points ignitions.