So... I figured I should update this thread.
I'm currently going through design iterations of a new intake. As it stands I have balanced the runners with plenum geometry.
Some pointers to keep in mind when doing this yourself:
- Plenum Geometry is very important with flow distribution to the runners
- Hemholtz equation is useful for understanding the ideal length for a specific RPM
- Plenum volume is important under natural aspiration criteria and less so in forced induction.
- Slowing the intake charge once into the plenum will result in more uniform flow distribution of the runners.