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Tractor Pulling Discussion Forum

8 STROKE IN A 1950 JD B ??????

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JD B

12-08-2003 13:40:13




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Can a 1950 JD B hold an 8" stroke?????




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WTW

12-08-2003 15:21:16




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 Re: 8 STROKE IN A 1950 JD B ?????? in reply to JD B, 12-08-2003 13:40:13  
That's a tough question to answer. Can it be done? Yes with enough time and money. How long will it last? Depends on how hard you pull it and how often. The other most important factor is how good the workmanship is on the crank. I have one "B" John Deere that pulled at Princeton Ind. over the Thanksgiving weekend that started its 15th year / pulling season since the crankshaft and engine had been put in it. Nothing has been done to this engine in 15 years except oil changes, ignition tune ups and I adjusted the valves on it once. Its not the most powerful "B" in the country anymore but still does alright for no bigger than it is. This tractor took a second place in the 3500# 4 mph class. Its less than 280 cube with a 6.75 stroke. My sons "B" is pretty much the same tractor engine with a larger stroke. It won the 3500# and 4000# 4 mph classes at Princeton. Its got at least 1/3 more power than mine and it doesn't have no 8" stroke either. The crankshaft in his broke this last summer with under 4 seasons on it. The thing you have to factor in on both theses tractors is they go to allot of pulls. I know for sure each of them would average over 75 hooks a year. That allot of pulling times 15 years on my tractor. What type of classes are you wanting to pull with your "B"? You can build a pretty competitive tractor with a crank less than a 8" stroke. We don't win them all but very seldom you find us at the back of the pack either. Problem is when you go big stroke the journals get kind of small all and short lived. Email me if you want to chat on this subject some more. Good Luck, Dave W.

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