Pertronix Ignition Coil Help

[Edmond]

My old ignition coil needs to be replaced.
Want to get the pertronix Ignition Coil.
The old coil label is so worn that I can't read the #ohm's on it and what brand it is.
The pertronix comes in 3 different classes.
One has 0.32 ohm, 1.5 ohm, 3.0 ohm.
Would anyone know what are the differences and which would be best to fit bronco?
Running 302,electric distributor.

Much appreciated

 

[broncnaz]

The 1.5 should be what you want with a V8 but you have to bypass the stock resistor wire. The .32 is for CD igintions and the 3ohms is for 4/6 cyl engines

Pertronix coils have the resistance built in. Where a stock coil used a resistance built into the feed wire. Most other aftermarket coils are like stock coils you just run them with the stock wiring but pertronix has to bypass the stock wiring.

 

[Edmond]

Hello Naz

Thank you for the advise.
I will bypass the resistor wire.
If I am not mistaken the old coil has a resistor but not inside of it.
I will just have to cancel that small unit and run a straight line to the pertronix coil. Correct?
Another question,
what would happen if I kept all wires the same and still ran the pertronix just like the existing coil?
Not sure if pertronix will address this issue in its Manuel when I purchase it.
I will bypass it for sure..
Great information to know.

Many thanks

 

[broncnaz]

The old coil probably doesnt have a resistor unless its been replaced before with ne that is internally resisted. The stock resistor is in the wiring near the ignition switch.
Yes just run a new wire off the ignition switch to power the coil.
You may be able to run the pertronix with the stock resistor wire but the spark will probably be weak. I wouldnt do it. There have been people that have run it that way but sooner or later they tend to have problems. If you try to run it off the stock wiring You'd be better off just running a stock replacement coil in that case.
For the most part aftermarket coils are really no better than stock coils. As no matter what the rating is the coil only puts out what is needed to jump the plug gap. Most stock coils can put out about 40K volts. Not much different than the aftermarket ones. Now if you have a engine with really high compression or are boosting then a aftermarket coil may be needed. Just some info for you to ponder but most of us will run aftermarket coils anyhow.

 

[Edmond]

thank you Naz
greatly appreciated.