Champion X plug differences

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Model T Ford Forum: Forum 2012: Champion X plug differences
Top of pagePrevious messageNext messageBottom of page Link to this message  By Joseph Magedanz on Saturday, July 14, 2012 - 07:49 pm:

Can anyone tell me why the left plug has an extension beyond the threads at the bottom and the one on the right does not?

plugs 01

Someone said one would be for a hit-and-miss engine and the other for a Model T. If so, which is which?
Thanks.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Craig Anderson, central Wisconsin on Saturday, July 14, 2012 - 08:05 pm:

I'm running all OLD, NOS, X plugs like the one at the left.
Most hit & miss engines have enough room between the head and piston to put a sparkplug INSIDE the cylinder.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Erich Bruckner, Vancouver, WA on Saturday, July 14, 2012 - 08:49 pm:

Caution, I'm no expert.
As far as I know, the type on the right are older than the type on the left. Only a matter of vintage, but they are the same plug and both work for the model T.

Would love to hear more detail from someone who knows. Seems this has come up in the past.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Saturday, July 14, 2012 - 11:39 pm:

The typical Ford X is long length to reach the combustion chamber, early ones were shorter when the low head was used. With the later high head, the longer plug is better.






1918 ad.


Ford script Champion X in high head cutaway showing the plug depth needed for the electrode to give the best fire to the T. Factory recommended plug.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John Carter - South Jersey on Sunday, July 15, 2012 - 07:05 am:

Here is an ad showing that both "long" and "short" were offered at the same time:
x


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Sunday, July 15, 2012 - 09:18 am:

In Dan's first picture the plug on the far right, without ridges in the porcelain, is the type used up to the early twenties. There's a version which came after it, not shown, which had ridges like the later plugs, but was like the earlier plug otherwise. The center post, which was removable, had a 6-40 thread. If I was at home I'd show a picture of it. All the later plugs, from the later twenties on, have a non-removable center post attached by the crimped-on brass cap. The thread on these plugs is 8-32.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Timothy Kelly on Sunday, July 15, 2012 - 09:32 am:

Might anyone be in a position to comment on what spark plug was installed in a Model K Ford from the factory?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Paul Mikeska, Denver CO on Sunday, July 15, 2012 - 09:38 am:

I am not an expert but I bet that the K was supplied with Splitdorf plugs.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Timothy Kelly on Monday, July 16, 2012 - 09:17 pm:

Paul - thanks for the reply. Might you happen to have a picture of said Splitdorf plugs? Timothy


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Monday, July 16, 2012 - 11:16 pm:

The Splitdorf are very pretty green, you can find them for a few bucks at swaps. Good to add to your 1/2" pipe plug collection for your T :-)





Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Dallas TX on Tuesday, July 17, 2012 - 06:46 am:

Ford used Soot Proof plugs on the early Model T. Maybe on the K also?


Top of pagePrevious messageNext messageBottom of page Link to this message  By William L Vanderburg on Tuesday, July 17, 2012 - 07:56 am:

Here's a set I have....

wards


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Tuesday, July 17, 2012 - 12:45 pm:

Now that I'm home I can show that late/early X with the ribbed insulator, and a couple of views of the Wards version. Not as nice as William's set, but OK for three bucks.




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