desoto1939 Posted Friday at 05:15 PM Report Posted Friday at 05:15 PM I know alot ow owners ask what plug to purchase for their old MoPar flathead engines. A friend of mine who also owns a 1939 Desoto which is a driver car and not an AACA show car let me know about these plugs. He also uses these in his engine without an issues. Walmart back in the auto section has a rack of various small engine plugs. They only charge $1.98 per plug versus these same plugs that are listed on Ebay and they are selling these same plugs for $8-12 each. You also save on shipping if you purchase at your local walmart. When looking at the package you will also note that they are a replacement plug for Champion J8 plugs that were also used in our MoPars. From some of my early cars catalogs the original Champion plug that was used is the J8C, but the J8 replaced the J8C at some point in time. These Autolite 295 Plugs do not have the black body and do not have the original hash markings, but the body is not chrome plated and give you the BLING look But when you can purchase 6 plugs for a little less than $12 plus tax these are a great buy. I keep six in my tool box in the trunk of my 39 Desoto as spares. Also of note that the older Autolite A9 plugs are getting harder to find, but when at a swap meet look at the end label on the autolite box and look for this number: A00-12405-A these are the A9 14m 3/8 reach. Just passing along information to the members. Refer to the attached pictures. Rich hartung desoto1939@aol.com 4 Quote
Ivan_B Posted Friday at 05:33 PM Report Posted Friday at 05:33 PM Rich, You've already posted this in 2023: Getting a bit older? 😂 Quote
Plymouthy Adams Posted Friday at 05:57 PM Report Posted Friday at 05:57 PM there are those that will say they are not equal but superior..... Quote
moparfun Posted Friday at 06:50 PM Report Posted Friday at 06:50 PM At our age, a reminder is not a bad thing. 1 Quote
Booger Posted Friday at 07:47 PM Report Posted Friday at 07:47 PM dont care what they are as long as theyre not champion Quote
SteveR Posted Friday at 08:29 PM Report Posted Friday at 08:29 PM 1 hour ago, moparfun said: At our age, a reminder is not a bad thing. "Our age"? I'll have you know I am 39 years old and born in 1953! (Just don't tell my daughter or grandkids) 1 2 Quote
Plymouthy Adams Posted Friday at 08:44 PM Report Posted Friday at 08:44 PM I'd visit your world of bad math but there is no coffee and chocolate there.....! Quote
plymouthcranbrook Posted Friday at 11:49 PM Report Posted Friday at 11:49 PM 3 hours ago, SteveR said: "Our age"? I'll have you know I am 39 years old and born in 1953! (Just don't tell my daughter or grandkids) So you are celebrating the 33rd anniversary of your 39th birthday then? Quote
DonaldSmith Posted Saturday at 12:13 AM Report Posted Saturday at 12:13 AM "33rd anniversary" is for those stuck in the past, who vaguely remember that the word "anniversary" meant something like another year. The latest stylebook says "33-year anniversary". I cringe. I retort with "15th month anniversary" or "3-week anniversary". But back to spark plugs - Wally World plugs - good. 1 1 Quote
FarmerJon Posted Saturday at 02:07 AM Report Posted Saturday at 02:07 AM (edited) Despite the factory warning, I had good luck running the "power tip" type plugs in my Plymouth. Autolite AR73 can be had for less than $4 ea from Rock auto and added a little power to the top end, and seemed to have a little more push down low as well, tested by take-offs in 2nd gear. I did not take the time to track down a resistor version, in theory it might give a slight advantage as well. Autolite 74 plugs are the standard performance version. The "racing" plugs are side gapped, so have a shorter service life, but in 2.5 years of running them, I did not put enough miles on them to notice much wear. I put around 5000 on the first set. I replaced them due to a cracked insulator on 1. They also had no problems with fowling. I will dig around on my computer to find the pictures I took of one in a stock combustion chamber. Even with a milled head, there is no chance of valve to plug interference. Edited Saturday at 02:09 AM by FarmerJon Quote
OUTFXD Posted Saturday at 02:53 AM Report Posted Saturday at 02:53 AM 6 hours ago, SteveR said: "Our age"? I'll have you know I am 39 years old and born in 1953! I like to say im 18 with 36 years of experience. 1 Quote
SteveR Posted Saturday at 09:07 AM Report Posted Saturday at 09:07 AM 12 hours ago, Plymouthy Adams said: I'd visit your world of bad math but there is no coffee and chocolate there.....! Oh, they are hidden in the crypto-only drawer Quote
Ivan_B Posted Saturday at 12:58 PM Report Posted Saturday at 12:58 PM 10 hours ago, FarmerJon said: I did not take the time to track down a resistor version, in theory it might give a slight advantage as well I was under impression that the resistor is bad for the spark. The only reason those are used, everywhere now days, is to keep the RFI in check 🤨 Quote
greg g Posted Saturday at 05:27 PM Report Posted Saturday at 05:27 PM I am in my 47th replay of my 29th year. On the car side been runnung AC45 r gapped at .032 no issues for 50k miles. Stock v volt system, Quote
SteveR Posted Saturday at 05:40 PM Report Posted Saturday at 05:40 PM I have a 230 engine and 4 years ago I replaced the plugs to an NGK BR6S I pulled this today to have a look at them. the color was a beige and I have had no problems with them. I would estimate I put on 1-2K miles per year. 1 Quote
Dartgame Posted Sunday at 04:14 PM Report Posted Sunday at 04:14 PM (edited) It's a debate about who makes the best plug, and that's not my intention. The plugs I use are NGK, autolite a close second. Those I will avoid are champion. Edited Sunday at 04:16 PM by Dartgame Quote
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