Some of those old tractor engines used an open combustion chamber without a quench or wedge design. Being a large displacement engines, lugging hard and having short cam timing due to low rpms. Which raises combustion temps and pressure. You can make a 7.5 to 1 engine detonate on 87 in particular with old gasoline, in high air and coolant temps. With some soot in the combustion chamber and/or hot plugs. Often detonation isn't heard but the spark plugs, piston tops, ring lands, piston rings, cylinder walls and rod bearings say otherwise. We have all seen engines with broken rings and pounded rod bearings and wondered how it happened.
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Today's Featured Article - On the Road with Dave Gohl: Tractors and Farming - by Dave Gohl. I never thought I'd live to see the day, when I could call myself a farmer. What allows me to say this? Well, when our family moved to our 20 acre site near New Prague, Minnesota, I had one thought in mind. You guessed it, farm it somehow. A little history is in order. In my younger days, mom, dad and my brother made frequent visits to dad's youngest brother Pete, who took over the home farm from grandpa MIke. It was the typical set-up, milk cows, pigs & chickens. In the winter, we'd play
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