More ignition questions.

Coil output (spark) is dependent on the dwell time of the pick-up assembly (points, magnetic pick-up & module) in the distributor, and load through the plugs and wires. Using resistor wires and plugs helps put a load on the coil and will help cause it to put out more current.

This is where people get into trouble buying 60,000 Volt coils and then wondering why when it is put on a scope, they only have 15k-20k Volts. A coild can only put out its full potential if it is "saturated" enough to MAKE it put out its Voltage. If there is not enough saturation time or if there is no resistance in the system, you'll have a weaker spark. No one uses solid core wires or non resistor plugs anymore.

Also, remember.. a smaller, more intense spark is better than a big, weak spark, so don't open your plug gaps too much. Most guys thing that because they havea big ignition system they can run bigger gaps and the truth of the matter is, the more power an engine makes, the SMALLER the plug gaps become, sometimes down to .018" of gap.

Top fueler's have 44 AMP electronic magnetos. That's more power than your house uses at one time and enough huice to light your fire into the next world, yet the gaps are about .020" or so. It's because of the wet mixture going back to that smaller, more intense spark being better than a weak, wet, yellow spark.