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 - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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