If you saw the intro thread of mine (don't blame you if you didn't, I never check the **** things either), you would see I plan on putting a rocket engine in a clubman kit car, eliminating the traction problem and positioning problem of a PP SC.
The way I see it is 4psi across the rev range is significantly more usable on road and hill driving than waiting for a mad rush at the end that may be pushing up towards 8psi a la a centrifugal blower or aerocharger. The main problem I see is the extra torque that would be placed on the crank at idle, making it a ticking timebomb. Not to mention the imminent destruction of 1st and 2nd gears.