Author Topic: Distributor advance plate markings  (Read 116 times)

Offline thesado

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Distributor advance plate markings
« on: July 14, 2020 - 01:27:49 PM »
Over the weekend I tore apart two similar Chrysler distributors. The advance plates are stamped 13L and 15R. I understand that the digits denote degrees (half of the crank degrees), and I presume that the R and L denote right or left engine rotation direction. What I dont understand is WHY the rotation direction is indicated. As far as I can tell the components are identical aside from the slot lengths. What am I missing here?




Offline jimynick

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Re: Distributor advance plate markings
« Reply #1 on: July 14, 2020 - 10:16:53 PM »
The only reason that I can think of a reverse rotation requirement would be a marine installation with one side turning one way  and ditto the other and the cam for the points would require the mirror image of a standard distributor. That's just a S.W.A.G., but who really knows? I'd be interested if someone else had an opinion.  :cheers:

Offline thesado

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Re: Distributor advance plate markings
« Reply #2 on: July 31, 2020 - 11:32:37 AM »
Just had a thought. Maybe rich/lean instead of right/left?