The original Farmall Cub conversion was part of some other custom work, a tricycle cub, being done. Despite what was said, the Cub clutch, drive line, camshaft, carburetor, and crankshaft are more than strong enough or large enough for the 4 cylinder to 2 duel cylinder conversion. The horsepower will not be significantly larger or smaller although the torque curve will likely change.
The camshaft was cut in half at the center bearing and rotated. Just one cut not 3. There are custom camshaft folks that could also have made the camshaft. The ignition system was composed of 2 duel spark motorcycle coils,each firing 2 cylinders at the same time. Three of the 4 distributor lobes were ground smooth and the remaining lobe opened and closed the points. An additional set of points was added 90 degrees from the original set. One set of points went to one coil which fired pistons 1,4. The second set of points went to the second coil and fired pistons 2,3. The rotor etc... was not needed.
I don't think anyone doing this type of conversion believes it will result in a pot of gold at the end of all the rainbows in the world nor will it place the bluebird of happiness on everyone's shoulder, it is just something interesting to do, for those that like the sound of a 4 cylinder engine then don't do the conversion. It is just a tractor engine not a cure for cancer.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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