FWIW
Before reading his post, I was thinking "a sump doesn't have check valves or holes here" and thought about asking about it but it didn't seem to be worth mentioning at the time oops-I should have...Sometimes ya step on one toe trying to miss another...
Afterwords, I only mentioned it as a suggestion for why he and I weren't on the same page (guessing he missed the last design upgrade/pic or ???)...Subtle indeeed!

Actually, I take credit for mudding it up...I should of said, "...but the later discussion was about a [proposed device] with sump/baffle* with check valves (not free flowing holes) and a return into the baffle[], after pointing out it was a baffle [since it sits on rather than below the bottom of the tank, in this case]".

Quote Originally Posted by DMCVegas View Post
No, I disagree. The fluid level in the Sump/Baffle can only be as high as the reserve level in the tank. You might have a "check valve" system that keeps fluid escaping, acting as a one-way baffle, but with out a secondary pump whose sole purpose is to keep the Sump/Baffle filled with fluid, it will never rise above the fluid level in the tank.
NOW we're on the same page!

(Add "except with KOEO and I'm right with you totally)

Quote Originally Posted by nkemp View Post
The question discussed is if the GM unit's fluid level can be above the tank level.
OK my mistake there...I thought you dave and dave were discussing the unit you were proposing. But I still think the equation you gave and the expansion on it indicates the level in the baffle will never raise above the tank level unless the pump is running and the engine is not.