Posted by Janicholson on January 06, 2015 at 18:54:32 from (74.60.94.18):
In Reply to: Farmall H motor rebuild posted by 1945FarmallH on January 06, 2015 at 18:43:29:
Though controversial, there is no real way that the issue is real. Radically higher powered airplanes have had stub exhaust pipes 4 or 6 inches long and do not warp valves, or need back pressure. It is just nonsense. A open valve could have somewhat cooler air blow into it. It will however cool rather evenly as a result. Back pressure can only help an engine if the pressure pulses are timed through real research/dyno testing to hold in intake charge that would be exiting the port from supercharging or radical cam timing. Usually the header systems are designed to be a partial vacuum at the port to assist in scavenging all exhaust out. I recommend a muffler however. Because an H with a straight pipe has given me tinnitus in both ears (it is very not good) Jim
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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