Tegheim - Home made 4 rotor Wolvo 142

[infernosg]

Originally Posted by Tegheim

Yes, "full" sideport as large as possible. Like the secundary maybe.
And then a little peripheral port, maybe 25-32mm

I would suggest that only if you could stage them. Side ports optimized for low/mid-range power and driveability and have the peripheral ports activate at higher engine speeds to really open up the top-end. Unfortunately that would call for one hell of an intake manifold: 8 runners for the side ports, probably merging into less, and another 4 for the peripheral ports!