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Porting and Relieving
Someone asked what relieving was. I have held off replying to this thread
for fear of showing my age. Relieving was a term used for flathead
engines. It referred to removing metal from the block between the valve
and cylinder to allow more air/fuel mixture into the engine.
Jim Shepherd
1986 IHC S1900 being made into a motorhome
1959 BC150 in need of an engine (among other things)
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