I have a dual PMag installation. Is it ok to bundle spark plug leads together or should they be kept separated?
If I recall, when I installed ours, the manual clearly said that they should be separated with little spacers or combs - not bundled right next to each other. I don't know the "why", but since they called it out, that's what we did....
Excellent points. Thanks!My understanding and practice is to keep the PMag high voltage leads away from each other AND away from any other metal. This is to prevent the very high voltage being contained inside the insulation from escaping by arcing through the insulation to adjacent wires or structures. I have a friend who was chasing an ignition miss with another Electronic ignition and found a spot where there was a tiny black mark on the ignition lead where it was in contact with the engine mount. Arced throught the insulation. Moved it away and no more miss.
I think that the spark plugs work by having a high resistance in the plug that forces a spark to jump at high voltage. With EI, the voltage is so high that you can't use aircraft style leads with metal sheilding because the voltage will simply arc to the sheilding because it is an easier path to ground than the spark plug. Bundling the leads together will put them so close that arcing through the insulation is still an easier path than through the plug.
Nice! I was planning to use the old zip ties with tube separator method, but these look cleanerWe had an EICommander customer who felt a stumble and noticed the coil pack graph was showing a shorted plug. When he decowled he found a plug wire laying against his engine mount. After moving and securing the wire, his problem went away.
Try using some of these to keep your wires separated.
I ask because I was confused by the ambiguous wording in the installation manual...