more aos thinking ...

[blue2000s]

Originally Posted by JFP in PA

Except that none of them will create vacuum in the sump...............

-Confused-

All AOS's pull vacuum from the same place.

[JFP in PA]

Originally Posted by blue2000s

-Confused-

All AOS's pull vacuum from the same place.

No, you are confusing a mechanical air oil separator, which is simply a tank like device with screens and baffles that allows air to detrain or physically come out from the oil, and the AOS system on a Porsche that is a combination mechanical device and a vacuum source (the intake manifold vacuum) to lower the ambient pressures in the sump and allow the low-tension piston rings to seal.

Engines with inherent low manifold vacuum signals, such as a race engine, using a mechanical separator by design still need a vacuum source, usually a belt driven vacuum pump.

[The Radium King]

is not the greatest need for crankcase vacuum at higher rpm, when an exhaust vacuum system would be most effective as that is when the most air is flowing past the venturi?