The Ford Barn

Graham 37 · 01-15-2011, 04:20 AM

I am fitting a new pair of Offenhauser heads to my engine and I am having great difficulty sourcing correct fitting plugs locally(Queensland Australia).
I have surfed the Net and it is proving of little benefit.
Is there a plug that will screw straight in without modification to the heads and also 'bottom-out' flush.If I use the Champion H10 they will be short by a few threads,which I believe is unacceptable.
Anyone??
Ol'Ron??
Rumbleseat??
Part numbers and a supplier would be good.

Thanks,

Graham.

joel · 01-15-2011, 06:58 AM

Try a forum search: spark plugs offy heads, there is a post by walt dupont with several autolite suggestions

Walt Dupont--Me. · 01-15-2011, 08:02 AM

I just installed a new set of Offy 400 heads. I used Autolite 414 plugs. There 1/2in. reach, not extened tips, same heat range as H-10. Perfect fit. Walt

4dFord/SC · 01-15-2011, 08:04 AM

I use Autolite 437's in mine.

Graham 37 · 01-15-2011, 11:45 PM

Thanks to everyone.
Where can I buy them?I'll need a supplier that will send overseas(Australia)

Thanks again,

Graham.

Joe/Ct · 01-16-2011, 01:00 AM

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Quote:

Originally Posted by 4dFord/SC

I use Autolite 437's in mine.

I also use Autolite 437's....

4dFord/SC · 01-16-2011, 07:54 AM

Quote:

Originally Posted by Graham 37

Thanks to everyone.
Where can I buy them?I'll need a supplier that will send overseas(Australia)

Thanks again,

Graham.

Amazon has them, and I believe they ship overseas: http://www.amazon.com/Autolite-437-S.../dp/B000C1WBB8

funrunr · 01-16-2011, 08:10 AM

Graham, If you find what plug you need but unable to ship to Australia let me know where to buy them here in the US and I will ship them to you if that will help.
Best of luck, Mark
[email protected]

Ole Don · 01-16-2011, 10:07 AM

NGK B6L You may have to grind out a thread or two to prevent a hot spot, same as for a Champion plug.

36tbird · 01-16-2011, 11:17 AM

Ole Don, please elaborate on that procedure for a not so brite bulb like me. Are you talking about chamfering the bottom threads?

19Fordy · 01-16-2011, 01:35 PM

The NGK GR 2635 spark plug has an 11/16 ' reach with the washer. I use them on my MCF flathead heads. Perhaps they are long enough for Offy's.

Graham 37 · 01-18-2011, 06:18 AM

Thanks everyone for your good info.
After looking through a lot of parts books for equivalents, we found the answer only a mile away. NGK B6HS, 1/2 inch reach, same heat range as H10 they tell us. She runs like a sewing machine. It's a 99A in a 37 Fordor.
The heads were a gift to me from my son Gavin, for Christmas. Thanks to him we are a bit Model T mad also. He has a beautiful 26 roadster, an original car restored, and we're half way through a 27 roadster ute for him. Some other ideas in there too, a warm 8BA in a 27 ute rod, and a speedster for me. We'll see.
Thanks, Graham

01-15-2011, 04:20 AM	#1
Graham 37 Junior Member Join Date: May 2010 Posts: 5	Spark plugs for Offy's I am fitting a new pair of Offenhauser heads to my engine and I am having great difficulty sourcing correct fitting plugs locally(Queensland Australia). I have surfed the Net and it is proving of little benefit. Is there a plug that will screw straight in without modification to the heads and also 'bottom-out' flush.If I use the Champion H10 they will be short by a few threads,which I believe is unacceptable. Anyone?? Ol'Ron?? Rumbleseat?? Part numbers and a supplier would be good. Thanks, Graham.

01-15-2011, 06:58 AM	#2
joel Senior Member Join Date: May 2010 Location: Indiana Posts: 517	Re: Spark plugs for Offy's Try a forum search: spark plugs offy heads, there is a post by walt dupont with several autolite suggestions

01-15-2011, 08:02 AM	#3
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Spark plugs for Offy's I just installed a new set of Offy 400 heads. I used Autolite 414 plugs. There 1/2in. reach, not extened tips, same heat range as H-10. Perfect fit. Walt

01-15-2011, 08:04 AM	#4
4dFord/SC Senior Member Join Date: May 2010 Location: Columbia, SC Posts: 1,579	Re: Spark plugs for Offy's I use Autolite 437's in mine.

01-15-2011, 11:45 PM	#5
Graham 37 Junior Member Join Date: May 2010 Posts: 5	Re: Spark plugs for Offy's Thanks to everyone. Where can I buy them?I'll need a supplier that will send overseas(Australia) Thanks again, Graham.

01-16-2011, 08:10 AM	#8
funrunr Senior Member Join Date: May 2010 Location: Belleville,MI Posts: 1,463	Re: Spark plugs for Offy's Graham, If you find what plug you need but unable to ship to Australia let me know where to buy them here in the US and I will ship them to you if that will help. Best of luck, Mark [email protected] __________________ Thank God this is only a hobby!

01-16-2011, 10:07 AM	#9
Ole Don Senior Member Join Date: May 2010 Location: St. Michael, Minnesota Posts: 1,713	Re: Spark plugs for Offy's NGK B6L You may have to grind out a thread or two to prevent a hot spot, same as for a Champion plug.

01-16-2011, 11:17 AM	#10
36tbird Senior Member Join Date: May 2010 Location: nw SanAntonio, TX Posts: 939	Re: Spark plugs for Offy's Ole Don, please elaborate on that procedure for a not so brite bulb like me. Are you talking about chamfering the bottom threads?

01-16-2011, 01:35 PM	#11
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 11,605	Re: Spark plugs for Offy's The NGK GR 2635 spark plug has an 11/16 ' reach with the washer. I use them on my MCF flathead heads. Perhaps they are long enough for Offy's.

01-18-2011, 06:18 AM	#12
Graham 37 Junior Member Join Date: May 2010 Posts: 5	Re: Spark plugs for Offy's Thanks everyone for your good info. After looking through a lot of parts books for equivalents, we found the answer only a mile away. NGK B6HS, 1/2 inch reach, same heat range as H10 they tell us. She runs like a sewing machine. It's a 99A in a 37 Fordor. The heads were a gift to me from my son Gavin, for Christmas. Thanks to him we are a bit Model T mad also. He has a beautiful 26 roadster, an original car restored, and we're half way through a 27 roadster ute for him. Some other ideas in there too, a warm 8BA in a 27 ute rod, and a speedster for me. We'll see. Thanks, Graham