Frenchtown. Thanks for the input. The motor is a .40 over 225 ci with head work, larger valves and a MoPar cam (460/268). I'm limited on length and carb baseplate width for the plenum.
I kept the width on top to just 3" which is a tad more than the width of the carb bases. The length was kept as short as possible for clearance reasons. Its 19". The runners are 1.75" dia. and 8" long.
The only variable left is the height, which I set at 2.5". My original plan had it at 2", but I increased that to make room for water heat at the bottom of the plenum. Its a street motor.
However, the height is easily changed at this stage. Are you thinking about the Helmholtz Theory and volumetric efficiency?
