Check the "view my photo gallery" picture all the way on the right side and you'll see a Weaver Dry Sump pump. I run the Dry sump system with no problems on the street. The dry sump will pull a vacuum if you seal the valve cover vents. And your absolutely right the
oil has to go somewhere. I plan on making the vent set up on top of my
oil tank with a setup that will allow the air out but return the
oil to the tank. Possible?
Also as Jack has said before you should have some method to regulate the vacuum so its not too much. By the way Jack great numbers on Torque and horsepower. How many cubic inches?
Regards,