What coil..?

Mike69cuda said

Theoretically true, but don’t the ECUs have snubbers that limit the primary voltage peak to a few hundred volts to prevent breakdown of the switching transistor? That would seem to be a limiting factor no matter what coil is used. Seems to me the only way of increasing the peak voltage would be a higher turns ratio or more inductance.

I am always a little skeptical of advertised specs, as they are often derived using “best case” conditions which may not achievable in a normal application.

Click to expand...

I've put an o-scope voltage probe on the coil + and measured this. This voltage at coil + is going several hundred volts minus relative to ground [rest of sentence deleted]. I thought I had some pix of this on the 'scope display, but I only got pix of the details after the arc was fired, when the voltages collapse everwhere. (Once the spark arc is established, it's a short on the system, and the voltages drop like a rock.)

-400 volts x 60 = 24000 volts.... And yes, the 60:1 OR the 46,000 volts may be some nominal value or some special conditions... who knows what the marketing dept did with what numbers LOL.