Manifold Design Process

This is how it all started, after reading "Scientific Design of Exhaust & Intake Systems" by Philip H.Smith, I wanted a tuned length, RAM-Resonant manifold for my LPG 308!
Alas, none are available, so I was faced with a mission, design and build one! What followed was termed insanity by my wife and friends, but their nay-saying only drove me harder to build this thing!



I tuned this thing to capitalise on the resonant pulse crated in the runner when the intake valve closes. I have tuned the length of runners for maximum gains between 2000 and 4000rpm, for daily street use. intake Valve to plenum is 19" in length! I picked up 32% torque at 2000rpm, that translates to brocken auto, diff and axles if your not carefull!