The Ford Barn

DD931 · 04-09-2019, 03:32 PM

I have just acquired some Champion No. 20 spark plugs. Without an extremely close examination they appear to be suitable for a Model A. They are two-piece, but do not have a copper top. Can anyone offer some insight?

Jim/GA · 04-09-2019, 04:16 PM

Is it a Champion W20? If so, it is a bit hotter than a stock Champion 3X. Works OK on a Model A. A bit hotter than a W18.

I have 6 new ones here, if anyone would like to run them in their engine. You can have them for $5 each + postage (~$6.50).

DD931 · 04-09-2019, 04:49 PM

No - just 20. Only have two ribs at the top - the rest is smooth. Not like the W14 I have which has ribs all down the insulator except where the numbers are.

M2M · 04-09-2019, 05:10 PM

M2M · 04-09-2019, 05:16 PM

M2M · 04-09-2019, 05:22 PM

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JoeCB · 04-09-2019, 05:37 PM

I see an I-H-C logo, that is International Harvester Co. Plugs for the old farm tractor guys. I don't know how the heat range would compare for Model A use... but suggest might be in BIG demand for them with the old tractor restoration crowd.

Joe B

DD931 · 04-09-2019, 07:09 PM

M2M - That's it. No brass top like the first pic.

M2M · 04-10-2019, 02:03 AM

Quote:

Originally Posted by DD931

M2M - That's it. No brass top like the first pic.

Do you have these in new undamaged condition in their original boxes?

DD931 · 04-10-2019, 08:18 AM

Sorry - no. They are used in a bag with others. Insulators appear stained although I haven't tried to clean them. Points look almost new. Nice and clean in the combustion area. And I only have three!! Very much like your pics.

1crosscut · 04-10-2019, 09:32 PM

Quote:

Originally Posted by DD931

Sorry - no. They are used in a bag with others. Insulators appear stained although I haven't tried to clean them. Points look almost new. Nice and clean in the combustion area. And I only have three!! Very much like your pics.

To clean the stain from the insulator material soak the plugs in Oxalic Acid (wood bleach) available at any hardware store. Will clean off any rust and doesn't affect the steel or printing.
Works very well.

Bob-A · 04-11-2019, 04:38 AM

I checked my Feb. 1936, Champion Spark Plug Service Type Selector for Passenger Cars. And no number 20 plugs are listed. The #20 plugs must be for commercial, farm or industrial use.

Bob-A

DD931 · 04-11-2019, 07:22 AM

Thanks for all the helpful comments. You've given me the info I was looking for. FordBarn comes through as always!!

CWPASADENA · 04-11-2019, 08:30 AM

Model A spark plugs have a longer reach which puts the electrodes down into the combustion chamber.

The # 20 plugs as you have shown have shorter reach that puts the electrodes up higher and may be even into the threaded part of the spark plug hole.

I would stay with a plug with longer reach that designed to fit the Model A head.

JMO,

Chris W.

04-09-2019, 03:32 PM	#1
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Champion No. 20 Spark Plugs I have just acquired some Champion No. 20 spark plugs. Without an extremely close examination they appear to be suitable for a Model A. They are two-piece, but do not have a copper top. Can anyone offer some insight? Last edited by DD931; 04-09-2019 at 03:35 PM. Reason: add text.

04-09-2019, 04:49 PM	#3
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Re: Champion No. 20 Spark Plugs No - just 20. Only have two ribs at the top - the rest is smooth. Not like the W14 I have which has ribs all down the insulator except where the numbers are.

04-09-2019, 05:10 PM	#4
M2M Senior Member Join Date: Jul 2012 Location: Australia/USA/EU/Soviet Russia Posts: 1,105	Re: Champion No. 20 Spark Plugs __________________

04-09-2019, 05:16 PM	#5
M2M Senior Member Join Date: Jul 2012 Location: Australia/USA/EU/Soviet Russia Posts: 1,105	Re: Champion No. 20 Spark Plugs __________________ Last edited by M2M; 04-09-2019 at 05:21 PM.

04-09-2019, 05:22 PM	#6
M2M Senior Member Join Date: Jul 2012 Location: Australia/USA/EU/Soviet Russia Posts: 1,105	Re: Champion No. 20 Spark Plugs Sponsored Links (Register now to hide all advertisements) __________________

04-09-2019, 04:16 PM	#2
Jim/GA Senior Member Join Date: May 2010 Location: Young Harris, GA Posts: 1,815	Re: Champion No. 20 Spark Plugs Is it a Champion W20? If so, it is a bit hotter than a stock Champion 3X. Works OK on a Model A. A bit hotter than a W18. I have 6 new ones here, if anyone would like to run them in their engine. You can have them for $5 each + postage (~$6.50). __________________ Jim Cannon Former MAFCA Technical Director "Have a Model A day!" Last edited by Jim/TX/GA; 04-09-2019 at 04:26 PM.

04-09-2019, 05:37 PM	#7
JoeCB Senior Member Join Date: Nov 2018 Location: Farmington MI Posts: 284	Re: Champion No. 20 Spark Plugs I see an I-H-C logo, that is International Harvester Co. Plugs for the old farm tractor guys. I don't know how the heat range would compare for Model A use... but suggest might be in BIG demand for them with the old tractor restoration crowd. Joe B

04-09-2019, 07:09 PM	#8
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Re: Champion No. 20 Spark Plugs M2M - That's it. No brass top like the first pic.

04-10-2019, 08:18 AM	#10
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Re: Champion No. 20 Spark Plugs Sorry - no. They are used in a bag with others. Insulators appear stained although I haven't tried to clean them. Points look almost new. Nice and clean in the combustion area. And I only have three!! Very much like your pics. Last edited by DD931; 04-10-2019 at 08:21 AM. Reason: Add text.

04-11-2019, 04:38 AM	#12
Bob-A Senior Member Join Date: May 2010 Location: Central FL, USA Posts: 1,137	Re: Champion No. 20 Spark Plugs I checked my Feb. 1936, Champion Spark Plug Service Type Selector for Passenger Cars. And no number 20 plugs are listed. The #20 plugs must be for commercial, farm or industrial use. Bob-A

04-11-2019, 07:22 AM	#13
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Re: Champion No. 20 Spark Plugs Thanks for all the helpful comments. You've given me the info I was looking for. FordBarn comes through as always!!

04-11-2019, 08:30 AM	#14
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,882	Re: Champion No. 20 Spark Plugs Model A spark plugs have a longer reach which puts the electrodes down into the combustion chamber. The # 20 plugs as you have shown have shorter reach that puts the electrodes up higher and may be even into the threaded part of the spark plug hole. I would stay with a plug with longer reach that designed to fit the Model A head. JMO, Chris W.