The Ford Barn

houseof34s · 09-16-2014, 03:08 PM

what is the correct champion spark plug# for a 1940 ford flathead V-8 engine?

Tudor40 · 09-16-2014, 03:19 PM

H10, 5 rib with the black base.

Kube · 09-16-2014, 03:32 PM

Quote:

Originally Posted by houseof34s

what is the correct champion spark plug# for a 1940 ford flathead V-8 engine?

H10 with TWO rib. The so called "coke bottle" plug.
Five rib plugs did not come out until later and when installed in to a 1940 Ford should receive a point deduction of one point per incorrect plug.

houseof34s · 09-16-2014, 05:21 PM

Where can Champion H10 two rib black bottom plugs be purchased?

Kube · 09-16-2014, 06:58 PM

Quote:

Originally Posted by houseof34s

Where can Champion H10 two rib black bottom plugs be purchased?

Just about no where. IF you find NOS, expect to pay $50 each. Good used? About $20+ each.

rufus39 · 09-16-2014, 08:30 PM

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Kube is correct. These are very hard to find. I did manage to find a set at Hershey last year, but I had to look through several of the many vendors to come up with 8. Hershey would be my suggestion.
Good luck with your search..

Don Rogers · 09-16-2014, 04:23 PM

From looking at Champion ads and Plug Charts, it appears that 2 rib H-10's were manufactured thru early World War II (1941-42). Some time during the war the design changed to 5 ribs and was used thereafter. See enclosed image.

Terry,OH · 09-16-2014, 04:24 PM

The plugs do not have the Ford name on them.

ford38v8 · 09-16-2014, 08:36 PM

In reference to what Terry said, it is generally accepted that the two rib coke bottle with the Ford Script is a Service Replacement plug. The correct one is marked Champion H10.

Kube · 09-17-2014, 07:49 AM

Quote:

Originally Posted by ford38v8

In reference to what Terry said, it is generally accepted that the two rib coke bottle with the Ford Script is a Service Replacement plug. The correct one is marked Champion H10.

It is "generally accepted" yet NO ONE has proof one way or the other if the FORD plugs were installed upon the assembly line or were later, service parts.

houseof34s · 09-17-2014, 08:36 AM

Thanks for the all the great info V-8ers <> Much Appreciated For Sure.

houseof34s · 09-19-2014, 10:59 AM

what is the correct spark plug gap for the modern version of the champion H10 plugs/

Kube · 09-19-2014, 11:15 AM

Quote:

Originally Posted by houseof34s

what is the correct spark plug gap for the modern version of the champion H10 plugs/

Same as the authentic plugs

houseof34s · 09-19-2014, 11:26 AM

would that be 0.025/

Kube · 09-20-2014, 11:21 AM

Quote:

Originally Posted by houseof34s

would that be 0.025/

Yes, .025".

DD931 · 09-20-2014, 10:16 AM

0.030", I think.

09-16-2014, 03:08 PM	#1
houseof34s Junior Member Join Date: May 2012 Posts: 14	spark plugs for point judjing what is the correct champion spark plug# for a 1940 ford flathead V-8 engine?

09-16-2014, 03:19 PM	#2
Tudor40 Senior Member Join Date: Aug 2010 Location: Blairstown, NJ/Pemaquid Beach, ME Posts: 185	Re: spark plugs for point judjing H10, 5 rib with the black base.

09-16-2014, 05:21 PM	#4
houseof34s Junior Member Join Date: May 2012 Posts: 14	Re: spark plugs for point judjing Where can Champion H10 two rib black bottom plugs be purchased?

09-16-2014, 08:30 PM	#6
rufus39 Senior Member Join Date: Jun 2012 Location: North Georgia Posts: 111	Re: spark plugs for point judjing Sponsored Links (Register now to hide all advertisements) Kube is correct. These are very hard to find. I did manage to find a set at Hershey last year, but I had to look through several of the many vendors to come up with 8. Hershey would be my suggestion. Good luck with your search..

09-16-2014, 04:24 PM	#8
Terry,OH Senior Member Join Date: May 2010 Posts: 5,394	Re: spark plugs for point judjing The plugs do not have the Ford name on them.

09-16-2014, 08:36 PM	#9
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,634	Re: spark plugs for point judjing In reference to what Terry said, it is generally accepted that the two rib coke bottle with the Ford Script is a Service Replacement plug. The correct one is marked Champion H10. __________________ Alan

09-17-2014, 08:36 AM	#11
houseof34s Junior Member Join Date: May 2012 Posts: 14	Re: spark plugs for point judjing Thanks for the all the great info V-8ers <> Much Appreciated For Sure.

09-19-2014, 10:59 AM	#12
houseof34s Junior Member Join Date: May 2012 Posts: 14	Re: spark plugs for point judjing what is the correct spark plug gap for the modern version of the champion H10 plugs/

09-19-2014, 11:26 AM	#14
houseof34s Junior Member Join Date: May 2012 Posts: 14	Re: spark plugs for point judjing would that be 0.025/

09-20-2014, 10:16 AM	#16
DD931 Senior Member Join Date: May 2010 Location: PA Poconos Posts: 723	Re: spark plugs for point judjing 0.030", I think.