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Old 09-05-2021, 09:39 AM   #9
rotorwrench
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: ford 9n and model a motor

Most car engine conversions with the fuel tank & sheet metal mods also required a structural frame to connect the front end to the transmission due to the fact that the little 9N/8N 119.7 cubic inch engine was designed to be an integral part of the frontal structure. Anyone who has driven an early Ford tractor for a good bit of time can attest to how hard they ride when encountering mud ruts or pot holes. That front end takes a beating and needs all the help it can get.

The 9N & 2N tractors have low compression when compared to the 8N which made about a 4.1 horse power difference between the two. The engines are very much the same design with only a few differences. The model A 200 CID engine with 40 horse power would almost double the horse power but everything else would remain the same. There is no provision for a tachometer on the Model A set up so that would be a needed addition as well. The flywheel & clutch would have to match the tractor and I don't know what would work best for a bell housing. The model B set up may be preferable. The top distributor is definitely a big work around. The Funk conversions used engines that either had front distributor mounting or side mounting so they didn't have the distributor work around problem. They also had better water pumps than the model A.

The governor is also a needed item on a tractor. The PTO RPM has to be maintained to keep loads from killing the engine. The original ball type 9N Novi governors may not be the best type for a conversion since they were gear drive. Funk likely used a belt drive set up that Ford used for industrial engine applications but I'm not sure exactly what it was. It may have been a modified original Novi type set up to run with a belt.

Last edited by rotorwrench; 09-05-2021 at 10:08 AM.
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