This +24V +12V conflict regarding the Pertronix ignitor is something I'd like to understand. I've known for a while that there were two schools of thought on that, but didn't understand why.
Quote:
Originally Posted by Two Tone  Scott's instructions say to connect power source to the input at the noise suppressor which reads the same voltage as the output of the ballast. The Pertronix instructions say it may also be connected at the coil. Some others, like yourself say to connect it 28V. The ignitor box says it has an operating voltage of 8v to 16v. See what I mean about conflicting information here? I'm pretty sure that Scott does not recommend running the ignitor at 28v but I may be wrong. |
I dug up my ignitor box and instructions and checked them. The instructions clearly say to connect the red lead to +24V and, if using a ballast resistor, to connect it before the resistor. The box didn't have any voltage values on it. Is it possible there are two variations of the Pertronix UM-161 out there? That would also explain why Scott recommends connecting it to +12V and Pertronix says use +24. I've bought a bit of stuff from EI over the years and gotten a fair amount of info from Scott. His advice has always proven to be correct (other than this ignitor thing).
Hammogger's explanation of voltage fluctuations between the coil and resistor fits with my understanding of how things work.