Locally the 4020's had problems if they went much past 115-120 horses...Just about all the 5010-5020's around here had problems when turbos were added and the fuel screw was turned too much....The 806 IH's would handle 130-140 horses..My 856 IH ran a much bigger turbo and was run at about 150-160 horses in the field...It carried lots of oil with a truck oil filter added...It was capable of 190-200 horses in the field but puked water in warm weather so had to turn it down...It was run at 300-350 hp on the pulling track and I had no major problems..After the serious tractor pulling was over with we did ring it but nothing else..
A neighbor had a 5000 Ford with a M&W turbo...It stayed together good at 90 horses..
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Today's Featured Article - Tractor Profile: Ferguson TO-20 - by Staff. When the infamous "Handshake Agreement" between Henry Ford and Harry Ferguson fell by the wayside (that's a story in itself), Harry Ferguson quickly set up manufacturing plants for a United States version of his English TE-20. The TO-20 was relatively the same as the TE-20 except utilized some different casting materials and had a US-style electrical system. The TO-20 was a dead ringer for the Ford 9N and 2N models and they say that Ferguson did this on purpose when the Handshake Agreement wen
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