Re: Success…Lauson Pony Coil Converison w/ video

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quote Mas:

Thank you guys for the insight. My only question is what determines the required capacitance? Is it the coil (…)

As I understand it, it’s primarily the inductance of the coil’s primary winding. The condenser forms a "tank circuit", which is a (frequency) tuned circuit, with the primary inductance. This means that the condenser / primary winding are most efficient at a particular frequency – and if you’re thinking, you already realize that the frequency is directly related to the speed of the engine.

In short, a given combination of condenser value and coil inductance is most efficient at a particular frequency – aka a given RPM range.

ETA: Gary had it.. it’s almost entirely the inductance of the coil’s primary winding.