There are electric "superchargers" on the market that report about a 1 psi boost. It's kind of like getting a ram air effect as soon as you hit WOT. (Ram air benefits don't usually kick in until you hit around 70 or 80 mph). The gains are modest compared to conventional turbos and supers, but the guys selling them are honest about what they are selling.
BTW, this ain't it, and this guy's claims are outlandishly inflated. Avoid him.
Here's the real deal:
www.electricsupercharger.com Compare and decide for yourself.
