MPG is worse, but that's mostly tire related. Should technically be able to get better MPG with a blower and driving "responsibly", but no. I am never responsible when I drive the VX and with the tires, I get around 11-13 MPG.

The boost pressure line essentially taps from the fuel/manifold pressure. Stock FPR. Stock fuel pump. I believe another VX'er, Cyrk, had upgraded his fuel system when he supercharged, but I can't recall what all he did.

Remember, the Alpine is a baby blower. Nothing to call home to mom about. With the 5lb pulley, the max boost I have ever seen in 6psi. BUT.... that's instant boost with NO lag. I'll take it!