'36 ply. spark plugs

Started by Lew, January 22, 2017, 09:53:49 PM

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TodFitch

I've run Champion J-11 in my '33 since the 1970s. Champion plugs get a bad rap for use in our cars on some discussion boards but I've not had an issue. I tried AC Delco R45 but they did not seem to work as well. Could be because of the resistor in them (I could not find the non-resistor C45 in my local stores). Given my antique coil which is probably not quite up to snuff, any resistance in the ignition system is probably not a good thing for me.
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delaware39

I had to look under the hood! I've got Champion RJ12C in the '39. Got them at AutoZone, but I get most of my parts at NAPA. Be aware that I am running a 12 volt system and the plugs only have about 2000 miles. So far, so good.
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32cabrio

AC Delco C45 is one.
Google is your friend. Rock Auto shows plugs from
a couple of manufacturers.
Here is a link to another supplier:

http://www.automobiliausa.com/sparkplugs.html
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Bill Davis

NAPA Auto Parts has Champion, Autolite and AC spark plugs for your car.
I use the Autolites myself, but others may like something different.  Look it up on-line.
They show plugs for cast iron heads and aluminum heads, too.  All the part numbers
are there.
-Bill Davis, Killen,AL
1951 Plymouth P-23 Cambridge 4 door
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Lew

thanks; is there a recommended part number. for the plug, such as Champion, Autolite, etc.?
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atlbluz

I am running 0.025 on my P-6, as a starting point.  Then I adjust it a little if needed to get the right tip color.
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delaware39

I don't know about a modern reference, but the original service manual calls for 0.025. That's how the plugged are gapped in my 39 and it seems to run fine. I included a copy of the page in case you wanted to see some of the other ignition specs.
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Lew

Does anyone have a modern reference for the '36 Ply spark plugs? (cast iron head). I believe the gap is .025.
Thanks.
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