Nice setup. Why not get a variable vane? Couldn't you get it to compress (decently) at a much lower RPM? Lower than the red map on the first post? Though the red map is the lowest out of the three maps there, and you do use this at the track... couldn't you shoehorn another turbo in there and have a solenoid to switch between the two? Just kidding, that would be
extremely cost prohibitive.
