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Does a dry sump engine have two oil pumps? One to force oil thru the engine and a second to scavenge the sump oil over to the external oil tank?
No need for more than one.Does a dry sump engine have two oil pumps? One to force oil thru the engine and a second to scavenge the sump oil over to the external oil tank?
A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines. The dry-sump system uses two or more oil pumps and a separate oil reservoir, as opposed to a conventional wet-sump system, which uses only the main sump (U.S.: oil pan) below the engine and a single pump.
I have no idea how it can be done without two oil pumps. The two pumps might be in one housing, like a Harley. I know when you shop for a Harley oil pump it is one pump but it has two sets of gears.
Interesting. Just curious . . . what does this mean? Why is it done?. . . one to pressurize the gearshafts in the gearbox.