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A note about the butterfly valves: Yes, you can make the manifold run at max volume all the time by zip tying the cable to the actuator open, however you won't notice any performance gains (realistically you should get less low end torque).
It's meant to be there for a reason. If you disconnect it, the intake will function more like a regular multi-valve intake. Your basically creating a fixed geometry intake manifold by doing this mod. If the butterfly valves are tied to be left open partially or all the way, your creating a slower charge motion, which means the flame spreads slower, resulting in sluggish burn rates and lower engine output.
And since the actuator is controlled by vacuum pressure and ECU, wouldn't you think that by modifiying it to stay partically or fully open, that it may send a different signal back to the ECU causing you some problems?
As for the switch idea, I don't think it'd be beneficial personally, not very practical for a daily driver. If your in the middle of a race, you need to be focusing on the road. Not to mention human error, I mean if you don't flip the switch at the correct time, your forcing your engine to breath through a restricted intake setup at high RPM's. That spells lower engine output.
This of course is just my 2 cents...
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