Is the throttle cable mounted on the intake manifold? If so, you might be putting a slight amount of extra tension on the throttle with the aftermarket intake which, when the cable is cold and the metal in the cable is contracted, could cause the throttle to open slightly and the engine to idle high...

Awesome stuff! Just because this topic is called smooth look subwoofer, I had to share my not-so-smooth-looking subwoofer set up I used to be running in my 06 vibe gt http://i1281.photobucket.com/albums/a518/Will_Mccarty/007_zpse6c45815.jpg But is it really loud? YEP :D and that's the way i like it

How is the design coming along? Coming from another engineering student; I think this is one of the coolest projects I've seen, since you and other enthusiasts like us will actually benefit from the product you're designing. Anyway, put me on the list for one, preferably on the top of the list if po...