So in a post a year or so ago it was mentioned that someone in the Engine Masters comp had used a windowed block to reduce effects of pumping losses by increasing the cubic volume of the sump area (no vac pumps in engine masters?)
So if using a vac pump, its got to pull vs a set volume, if you could reduce that volume, it would work better?
So if you put a big sealed triangular wedge under the valley cover you could take out a bunch of CI from the internal space of the motor and make the pump work better?
That was my build in 2014 and you are correct-No vac pumps in EMC. I agree with your theory about reducing volume the vac pump has to act on. I also know how theories often pan out. J.Rob
