The Ford Barn

Standing Elk · 04-05-2019, 07:51 AM

How were the model A engines different than the N series tractor engines or were they?

Kurt in NJ · 04-05-2019, 08:10 AM

I think they used the same nuts for cylinder head, I don't think much else interchanges
They have more interchange with flathead V8

jhowes · 04-05-2019, 08:28 AM

I think that they are basically one half of an early V8. Does that mean that they use the same head and cylinders, I don't know. around 1940 or 1941 ford put this engine in there pickups as an option. It came with a four speed as they were so underpowered that the three speed was inadequate. Someone that knows something about this will chime in I hope. The engine is definitely smaller than the Model A. Jack

midgetracer · 04-05-2019, 10:15 AM

The 8N-9N tractor engine was identical with the four cylinder engine used in the early 40s Ford pickup with the exception that the pickup engine had a fuel pimp boss. No parts were interchangeable with the Model A engine. Bore was smaller. Oil pump ran off the timing gear and was part of the front main bearing cap. The engine was totally insert bearings. Intake and exhaust manifolds were cast in one piece. Definitely lower horse power....Pistons were 3 1/16 I believe.

ronn · 04-05-2019, 11:03 AM

It is kind of surprising that Henry didnt just use A engines in the tractors.

there must be a reason.

100IH · 04-05-2019, 12:23 PM

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I think that the time to prepare, pour, and machine the bearings was enough to not go that way. The daily numbers going out the door was cars / minute.

rotorwrench · 04-05-2019, 01:18 PM

The model A engine is 40 horse power and 200 CID so its larger than the 20/25 horse power 120 CID 9N/8N engine. Fasteners might be the only thing that would interchange. As was previously mentioned, there is some relation in design to the 239 V8 engine and some parts are interchangeable with it but not a lot.

04-05-2019, 07:51 AM	#1
Standing Elk Senior Member Join Date: Aug 2017 Location: St. Maries, Idaho Posts: 162	Engine question How were the model A engines different than the N series tractor engines or were they?

04-05-2019, 08:10 AM	#2
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Engine question I think they used the same nuts for cylinder head, I don't think much else interchanges They have more interchange with flathead V8

04-05-2019, 08:28 AM	#3
jhowes Senior Member Join Date: Jul 2010 Location: upstate NY near Mass border Posts: 789	Re: Engine question I think that they are basically one half of an early V8. Does that mean that they use the same head and cylinders, I don't know. around 1940 or 1941 ford put this engine in there pickups as an option. It came with a four speed as they were so underpowered that the three speed was inadequate. Someone that knows something about this will chime in I hope. The engine is definitely smaller than the Model A. Jack

04-05-2019, 10:15 AM	#4
midgetracer Senior Member Join Date: May 2010 Location: Bismarck ND Posts: 1,189	Re: Engine question The 8N-9N tractor engine was identical with the four cylinder engine used in the early 40s Ford pickup with the exception that the pickup engine had a fuel pimp boss. No parts were interchangeable with the Model A engine. Bore was smaller. Oil pump ran off the timing gear and was part of the front main bearing cap. The engine was totally insert bearings. Intake and exhaust manifolds were cast in one piece. Definitely lower horse power....Pistons were 3 1/16 I believe.

04-05-2019, 11:03 AM	#5
ronn Senior Member Join Date: Feb 2011 Location: NNNNNNNNJJJJJJJJJJ Posts: 6,790	Re: Engine question It is kind of surprising that Henry didnt just use A engines in the tractors. there must be a reason.

04-05-2019, 12:23 PM	#6
100IH Senior Member Join Date: Dec 2011 Location: SW Idaho Posts: 970	Re: Engine question Sponsored Links (Register now to hide all advertisements) I think that the time to prepare, pour, and machine the bearings was enough to not go that way. The daily numbers going out the door was cars / minute.

04-05-2019, 01:18 PM	#7
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: Engine question The model A engine is 40 horse power and 200 CID so its larger than the 20/25 horse power 120 CID 9N/8N engine. Fasteners might be the only thing that would interchange. As was previously mentioned, there is some relation in design to the 239 V8 engine and some parts are interchangeable with it but not a lot.