Which is better plug
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Topic author - Posts: 85
- Joined: Tue Jan 08, 2019 10:00 am
- First Name: George
- Last Name: Loranger
- * REQUIRED* Type and Year of Model Ts owned: 1921 touring
- Location: Grafton ND
- MTFCA Number: 32239
Which is better plug
I am going to buy a new set of plugs for my 21 that has a surging problem. I,m not sure if the plugs are the problem but where they look old and rusty I plan to replace. Lang’s champion 25 at$14.50 and motorcraft at $4.50
Should I go with champion and is it worth the extra money?
Should I go with champion and is it worth the extra money?
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- First Name: Steve
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Re: Which is better plug
Autolite 3095 from your local parts store for about $12 a set will get you by while you hunt down some original Champion X or other T era plugs on eBay or at swap meets. There are many Model T plugs — Behtlehem, Wards, Splitdorf, Horseshoe, Firestone, Edison, and dozens of others. Of course you can buy new Champion X for only $144 a set, but good originals are better and can be found for under $10.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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- First Name: Frank
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Re: Which is better plug
Best price on plugs has been RockAuto and their service is great. X's are just $27.79
https://www.rockauto.com/en/catalog/for ... +plug,7212
https://www.rockauto.com/en/catalog/for ... +plug,7212
The past is a great place and I don't want to erase it or to regret it, but I don't want to be its prisoner either.
Mick Jagger
Mick Jagger
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Re: Which is better plug
In my mind a spark is a spark is a spark. I have Motorcraft plugs and Champion 25’s in my 3 T’s. Autolite work fine too.
If you like to be authentic use Champion X’s.
They all work fine in for me.
If you like to be authentic use Champion X’s.
They all work fine in for me.
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Re: Which is better plug
I have had best performance out of Champion X plugs. Autolites will not allow my Roadster to idle without a miss. Smooth as silk with Champion X's.
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Re: Which is better plug
I agree that Champion X spark plugs are the best and most reliable, but it is historically interesting to see a T with Edison #14 spark plugs and Firestone parts that demonstrate how Ford and two of his best friends Thomas Edison and Harvey Firstone were not only friends in private, but were also affiliated with and supported eachother in business. Jim Patrick
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Re: Which is better plug
Edison # 14 spark plugs ..... in our '26, ... also installed in the '22 Touring at the Edison estate in West Orange, NJ.
Last edited by Moxie26 on Sun Jun 26, 2022 4:41 pm, edited 4 times in total.
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Re: Which is better plug
Over time the threads of the spark plug hole may restrict the plug from being properly positioned depth wise. Carbon, sealant etc.
Looking at the plugs there is a definite difference in the spark position past the threads. This may have an effect on each cylinder's performance and may account for plug preferences. viewtopic.php?t=17517
Looking at the plugs there is a definite difference in the spark position past the threads. This may have an effect on each cylinder's performance and may account for plug preferences. viewtopic.php?t=17517
The past is a great place and I don't want to erase it or to regret it, but I don't want to be its prisoner either.
Mick Jagger
Mick Jagger
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Re: Which is better plug
I believe the plug with the spark gap set lower, or further into the chamber, would perform best in a Model T. Getting the spark a little farther from the relatively cold head surface and a little farther into the fuel/air mixture would facilitate ignition and good flame propagation. The plug might also run a little bit cleaner, since the spark gap and insulator tip would be more nearly in the direct path of the incoming charge and it would probably run a little hotter. The deeper set plug would also slightly reduce combustion chamber volume, which improves power and efficiency.
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Re: Which is better plug
Seems a lot of engines differ. Most of mine were/are on X's and run great. My former '15 absolutely hated X's but ran great on 25's. Go figure.
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Re: Which is better plug
I have one car that likes Motorcraft but not so much the Champion 25’s. So I put the 25’s in my 24 Coupe and it runs fine.
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Re: Which is better plug
I want to state I'm no purest. My first T ( a speedster project ) had a distributer when I purchased the engine because because the mag was damaged. It also had modern spark plug adaptors. I run autolite #66 plugs and have never had a issue with them. However they are not very original looking ( not that a distributer is) I was looking for some good original plugs when I found that broken or damaged plugs are anywhere between free & a $1 each.
So I take early plugs machine the crimp off to remove the porcelain the counter bore and thread them for 14mm plugs to make a adapter out of them
when the plug is screwed in they are hardly distinguishable from original plug and they or a similar plug of other makes are cheep and available at most auto parts stores if you needed them.
Just my $.02
Craig.
So I take early plugs machine the crimp off to remove the porcelain the counter bore and thread them for 14mm plugs to make a adapter out of them
when the plug is screwed in they are hardly distinguishable from original plug and they or a similar plug of other makes are cheep and available at most auto parts stores if you needed them.
Just my $.02
Craig.
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