This is going to sound stupid and really hard to rig up without looking dumb. But what about a vacum operated induction system similar to what some Mopars & Chevys ran in the muscle car days? Stomp the gas and a flap/scoop opens up letting in more air when you need it. Let off the gas the flap/scoop closes so you car isn't force-fed air it doesn't need. Maybe you could rig a switch under the accelerator pedal,to close a circuit, that activates a electric motor contolled flap to accomplish the same thing.
Just a thought.
