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Old 12-19-2020, 09:00 AM   #20
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
Default Re: French Model A aluminum head

Quote:
Originally Posted by Terry, NJ View Post
Brad, Very interesting! So, they just used two connectors per cylinder and it used the same source for each spark! I was imagining something quite different. Maybe a two tiered dist. cap with a longer shaft, maybe keyed, maybe square to accommodate a special rotor, with wires, not connectors and two pressed in brass "tracks" for the rotor pickups to carry the charge from the coil. Interesting problem!
Terry

Having "the same source for each spark" means that only one of the plugs fired at a time, so the only advantage would be longer plug life!

With just one path from the coil to the distributor cap and only one spark being generated by the coil, the spark will only fire one of the plugs, whichever one requires the least voltage. To fire both would require a separate coil for each plug (and a modified or second distributor). Or a coil with two leads as described in my previous post.
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