I tired to search and didn't find the exact answer I was looking for. Long story short, car would start fine then after a while it would stubble and shut off. So, pulled my Jacobs Ign. box and ultra coil off and starts up like a champ after I replaced all the sensors, etc before I tried this.

Anyways, how much voltages does the stock coil support? I had about 47,000 with the old setup and the new Jacob's are 60,000 volts but just curious how the stocker compared.

Is it 30,000 volts?

 

if its in good condition, the external delco coil will put out 50+.
with the coil wire off they will easily fire down the tower to the laminations.
if i remember right, it takes around 22,000 volts to jump 1 inch, its about 2.5 inches to the laminations, so 22,000 times 2.5 comes to 55,000.

 

I believe the stock divorced coil only puts out 44000.

 

Irrelevant.

Voltage will only ever go as high as necessary to ionize the gas between the two spark plug electrodes. In a running engine that's almost never more than 15-20K volts even under highest load (WOT operation). Beyond that it's all about the total electrical energy in the coil how long it can keep that spark lit (measured in mili Joules, I believe).

In short, don't worry about the "voltage rating" of ANY of your ignition components EVER. It's completely irrelevant and misleading. The main thing is to diagnose what's gone screwy in your current ignition system. Whatever it is, the engine will instantly run better once you discover and correct the problem.

 

I'm not worried about it. Just would like to know....b/c I am testing AF ratios between the two so...info would be nice.
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Its in good condition but about 17 years old.