electric supercharger

The makers claim "over 2psi of boost and about 15% power increase at the wheels". Its unclear whether the device increases boost as the revs increase, by controlling the pump speed. Neither do they indicate what happens to the air-fuel mixture ratio, or how the output from the MAF sensor is "modified" to (maybe) satisfy the ECU program.

True forced induction systems (turbochargers and superchargers) increase the boost as the revs increase, and the ECU is programmed to adjust the mixture and timing accordingly. In addition, the compression ratio is lower so the forced system can compress more air-fuel in to the cylinders. When the normal n/a compression ratio is used, the amount of boost is limited or else the engine will have detonation and hot spots in the combustion chamber that can cause burned valves and pistons. True forced induction systems typically have around 7-9 psi boost.

What this device seems to do is blow more cold air into the engine, and hence more fuel, and relies on the ECU to sort out the mixture, ign timing and hence the emissions. The problem is that the ECU relies in a complex formula that includes rpm, O2 and MAF and coolant temp readings. If the induction pressure, rpm and O2 readings are out of sync, you may have a bit more power (at what rev range?), but the fuel ecomomy and emissions will be messed up.

The clincher is that the manufacturer says the device can removed when you need to have the car serviced at the dealer.

Don't waste your money.