Just my $.02...
A similar product, the eRam, will produce an effective 1psi of boost while drawing 100amps in a dual unit install. In most cases, that's good for about .5 in the 1320. To do this setup properly, one would need a seperate battery not connected to the main electrical system(except perhaps through a manual isolator for recharging). For the money it would take to do that setup, one could run a mild "nahs" setup with less weight and better results.
Don't get me wrong, I like the electric compressor idea as much as anybody - but it takes a lot of sustained current to run one. I'd just as soon run an exhaust driven compressor.

Dan Beggs
99 Cougar V6, loud