Hi all, finally thought i'd post something here. I'm a 2nd year mech engrg undergraduate and I've come across this electric supercharger called "E-RAM". There are many other versions out there but this seems to be the most 'promising'. It's basically an electric motor with an axial type fan connected in-line with the intake piping and it is supposed to act like a turbo/supercharger by increasing the pressure and hence the density of the intake charge. While viewing the video on youtube, there was one clip where the guy setup an experiment to measure the output of the fan. He was measuring the current drawn by the motor and the 'wind speed' of the fan by placing an anemometer at the end of the short duct. Now, for the key question: From what I understand, the factor that increases the power output of an engine is the increase of mass flow into the cylinders right? That's how turbochargers are rated, by their CFM. My aim is to try and prove that this electric supercharger cannot provide enough flow to even meet the demands of a standard 1.6L engine, let alone increase the power output. Now for the calculations, correct me if I have used the wrong formulas or methods. Ohm's law: Power = V * I = 13.8V * 62amp = 855 watts. Assuming 100% efficiency for the motor, that means that 855 watts is 'transferred' into the fluid. Assuming incompressible flow, perfect gas and no frictional or other losses, From the power in fluids equation, Power = pressure * flow rate. (bounded flow) Assuming that the E-RAM does provide 6psi (0.4bar) of positive pressure rise (as seen in another video) so, the flow rate Q = 0.855kW / 0.4 * 101kPa = 0.0211m3/s. The formula i got for the flow requirements of a 1.6L engine @ 6500rpm, assuming 0.8 efficiency: Engine Volumetric Flow = (displacement * rpm * volumetric efficiency/ 3456) = 97cubic inch * 6500 * 0.8 / 3456 = 146 CFM = 0.0689 m3/s Thus, at WOT at 6500rpm, the electric supercharger cannot provide enough flow to even meet the demands of the engine, and hence acts as more like a restriction. Is this statement correct?