Ford 8N heads

brownell3387 · Nov 23, 2021

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

Dean · Nov 23, 2021

OEM side mount heads are different from OEM front mount heads.

Aftermarket heads are universal.

Dean

wore out · Nov 24, 2021

(quoted from post at 22:13:12 11/23/21) OEM side mount heads are different from OEM front mount heads.

Aftermarket heads are universal.

Dean

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?

Hobo,NC · Nov 24, 2021

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.

Dean · Nov 24, 2021

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

Dean · Nov 24, 2021

Yes.

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

Dean

8NChris · Nov 24, 2021

(quoted from post at 07:18:04 11/24/21) 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

s the Sherman head a lower than stock compression? If so what advantage did it have as a replacement?

Dean · Nov 24, 2021

No, the rare Sherman is an exception to my post above.

Somewhat higher CR and better heat dissipation.

Dean

8NChris · Nov 24, 2021

(quoted from post at 12:21:20 11/24/21) No, the rare Sherman is an exception to my post above.

Somewhat higher CR and better heat dissipation.

Dean

k, I heard it was better but have never seen it's combustion chamber side by side with the stock 8N head.
Thank's

DMartin9N-2N · Nov 28, 2021

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.

Ford 8N heads

brownell3387

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Dean

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wore out

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Hobo,NC

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Dean

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Dean

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8NChris

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Dean

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