Teach me about ohms and coils Options

[jsayre914]

I am currently running a stock distributor on my 2.0 w/ Djet. It has the pertronix ignitor module made for my distributor with the vacume advance. I also had a flame thrower 3ohm coil made by pertronix. I am not sure how many ohms a stock bosch coil is, but my question is...

most high performance coils such as mallory, crane, even the flamethrower (not the one I have) comes with a resistance of .06 or less. Why is this, and what does the ohms do for you anyway. I am thinking to put one of the VERY low ohm coils on my engine to see if any better performance.

If you dont mind also explaining why i threw out my ballast resistor when I originally put the pertronix in. (as per installation instructions) what the heck did that do for a stock coil thats not needed for a 3 ohm coil?



(IMG:style_emoticons/default/popcorn[1].gif)

[SLITS]

When we ran the race cars, I set up a hi-output coil with an optical trigger. I did not use a ballast resistor. Found out two things:

1.) Putting 12 VDC to the system produced one hell of a spark through the distributor that burned out the center electrode in the dizzy cap.
2.) The brillance of the spark in the dizzy cap triggered the optical pickup and caused spark to jump across the electrodes.

I added an old style ballast resistor which I believe effectively drops the voltage to the coil to 9 VDC from 12 VDC with no further problems.

The Bosch Blue coil that is run with the systems has an internal resistor to drop the voltage to the primary coil.