Posted by Jim Becker on December 20, 2009 at 09:45:04 from (173.57.141.22):
In Reply to: exhaust lift posted by Joe Dowling on December 20, 2009 at 08:27:18:
Janicholson said: Control of depth and down pressure were "springy" and (opinion) that is the major performance issue.[/quote:81788146c1]
The usual setup on a pneumatic lift system, the lift was run to either a fully up or fully down position. Operating depth was set with manual levers. The same concept was used on hydraulic operated equipment on the H and M.
[quote:81788146c1="Janicholson"]The pressure was modest, and it had to be to avoid likking the engine.
When in good condition, the pressure valve put a pretty tight seal on the exhaust. If you left it closed after the cylinder hit the end of the stroke, it could stall the engine.
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