How to Install Capacitor to High Tension Wire of Spark plug to increase power?
My guess is that he wants to increase the spark to a sparkplug in order to a) increase power or b) increase efficiency or c) both. If you insert a capacitor in series you risk changing the time at which the electrical charge arrives at the sparkplug, throwing off the timing of the explosion of the fuel/air mix in the cylinder. There is already a capacitor in parallel with the high-tension wire going to the sparkplug, to control when the spark arrives at the sparkplug. It is called a condenser. Either get a larger coil, or increase the input to the existing coil.
