[Christ]

If you want to further control the airbox heat, you can use a thermal switch and an electronic valve. Place the thermal switch somewhere in the intake tubing to monitor air temps, wire it to a controller on the valve you already have in place. In this way, the valve will shut off at X temp, and open back up below X temp, keeping a close range of temps in the intake tract. Different switches will allow you to fine tune for the best IAT for FE.

I had a similar idea quite awhile ago, wherein I'd use a small heater core mounted in the airbox. I never got around to doing it, but at least someone is... if it works for you, I might also give it a shot.