A to T Conversion
posted by Robb on 25 Nov 2004

Les Schubert brought this interesting crank to the November 24, 2004 Foothill Model T Ford Club meeting. Les is constantly innovating and finding unique ways to contribute to the old car hobby. It didn’t take long after the Model A was introduced for speed enthusiasts to replace the understated Model T crankshaft with the more robust Model A version. The Model A shaft is not a simple upgrade and a number of modification must be made to get it to fit. The most significant challenge has been to reduce the length of the Model A shaft or to increase the length of the Model T engine and crankcase to accommodate the 5/8” longer Model A crank. One of the more common fixes has been to cut the rear flange from the Model A shaft, shorten it appropriately and weld the flange back on. Experience has proven that it is just a matter of time before the weld fails and the shaft breaks. With Les’s engineering background and experience in manufacturing it was inevitable that he seek a way to solve this problem. The Model A crank flange was removed, the crank shortened, and the end of the crank was machined to a very slight taper. A new thicker flange was fabricated which also receive the same taper in the undersized center hole. The flange was then heated and pressed on to the cold crankshaft. Excess material on the flange was then removed and it was “trued” to the crank. Les is confident that the flange is there to stay. I believe he will be using this crank in his Peking to Paris car.
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