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 - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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