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Ford 9N, 2N & 8N Discussion Forum
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Ford 8N heads

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brownell3387

11-23-2021 18:54:29




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Hey everyone I am curious are the heads on all the 8NS the same or are they different between the front mount and side mount distributors




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DMartin9N-2N

11-28-2021 10:06:13




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
Good morning, Dean & all: I have a 9N/2N engine block with an aftermarket head intended for later 8N. It has the rearward positioned oil filter bolt holes. so that is where my oil filter is located. The (slight) problem is that my oil filter covers or blocks viewing the serial number on the block. Just one more tiny detail with a Frankenstine tractor.

Dennis M. in W. Tenn.



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8NChris

11-24-2021 12:22:59




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
Quoting Removed, click Modern View to seeOk, I heard it was better but have never seen it's combustion chamber side by side with the stock 8N head.

Thank's



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8NChris

11-24-2021 09:44:57




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
Quoting Removed, click Modern View to seeIs the Sherman head a lower than stock compression? If so what advantage did it have as a replacement?



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Dean

11-24-2021 11:21:20




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 Re: Ford 8N heads in reply to 8NChris, 11-24-2021 09:44:57  
No, the rare Sherman is an exception to my post above.

Somewhat higher CR and better heat dissipation.

Dean



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Hobo,NC

11-24-2021 05:30:09




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
I will add OEM 8N heads have a littler more compression over the 9/2N head. Aftermarket replacement heads have a deeper combustion chamber much like a 9/2N head. That's the big difference in all the heads.
Oil filter mounting can easily be overcome the compression difference is harder and more expensive to overcome.



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Dean

11-24-2021 06:18:04




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 Re: Ford 8N heads in reply to Hobo,NC, 11-24-2021 05:30:09  
Bingo, Hobo.

Installing an aftermarket head to an 8N will decrease HP and torque a bit. The OEM 8N head is well optimized for the era.

Dean



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wore out

11-23-2021 22:04:34




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
Quoting Removed, click Modern View to see

To add to that, the OEM side-mount heads have drilled and tapped "bosses" for the coil mounting bracket that the older heads didn't have or need.

Replacement heads have the holes, they are left unused when installing that head on an older engine.

Dean, were the oil filter mounting bolt holes ever moves over the "N" production run?

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Dean

11-24-2021 06:21:02




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 Re: Ford 8N heads in reply to wore out, 11-23-2021 22:04:34  
Yes.

The oil filter mounting bosses were moved to allow moving the filter rearward when the generator was moved to the left side.

Dean



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Dean

11-23-2021 21:13:12




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 Re: Ford 8N heads in reply to brownell3387, 11-23-2021 18:54:29  
OEM side mount heads are different from OEM front mount heads.

Aftermarket heads are universal.

Dean



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