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Think I would throw your book away! Perkins engines were fitted to the E27N Major at the factory but the E1A Major had a totally Fordson designed engine which was unique at the time, having direct injection instead of indirect. Perkins did not develop a direct injection engine until the middle 1960's. However petrol/kerosene E1A's were not a popular tractor because of their fuel consumption so a number were converted to Perkins L4 engines and exported. This would be the only Perkins connection. Perkins collaborated with Fordson to design an engine for the smaller Dexta tractor but even this was only assembled at Peterborough, the majority of components were still made by Fordson at the Dagenham plant. As I said in my earlier post, I know little about pulling tractors. But: 1. There is little you can do to the injector. 2. Most injectors used on Ford tractors are the same unit. The power increases were obtained by different head/manifold designs and improvements to the tractors breathing. 3. The maximum fuel delivery from the pump can be increased by adjusting the screw at the stop control housing. This allows the rack to travel further and therefore more fuel to the injectors. This will increase the black smoke of course. 4. I would not alter the timing. On a diesel this can cause the tops of the pistons to develop holes and break crankshafts. Even a small change to the air intake can make these engines develop more power. We used to just tweak the fins of the pre-cleaner and improve it. One of my colleagues drove a Power Major about 30 miles with the air cleaner pipe disconnected at the manifold. He achieved speeds of nearly 30mph and on a long straight road even overtook a local resident in a Ford 8hp car. Send the picture to me at bhe at btconnect.com and I will put it on the board.
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