When designing a manifold. Minus the countless possible hours of R&D. Is there a specific formula that you use when trying to design one. I have read and read and read. Is it really that detailed? Or are there some short cuts? Details like, Runner length, Runner I.D./O.D, Plenum Volume, CFM Velocity, Volumetric Efficiency, Displacement, Desired Powerband, N/a or F/I... etc.. etc... Just curious...