So, how much power does it take to drive an efficient supercharger like a screw type? The most efficient type of supercharger, flowing 265 cfm and developing a boost of 11.5 psi, takes 14.5kW to drive it. Figures aren't readily available for centrifugal blowers, but they'd be of a similar magnitude. So the best blower design (the same type that's used on the Mazda 800) takes about 14,500 watts to drive it on a modest-sized engine. This power is derived from the engine via a belt connecting the blower to the engine's crankshaft.

But let's say that instead of using a belt-drive from the engine, we power the supercharger by using a 12 volt electric motor powered from the car battery. For an electric motor power of 14,500 watts, we'd need a current flow of about 1000 amps (14,500 watts divided by 13.8 volts = 1050 amps). So, to supply the current to drive an electric supercharger having the same airflow output as the most energy-efficient type currently available, it would take 1000 amps. To generate this much electrical power would require at least 8 heavy-duty alternators bolted to the engine. Furthermore, to handle this current, the wires connecting the battery to the supercharger would have to be enormously thick - perhaps brass or copper bars 10mm square would be needed.

 

ya, ive seen a lot of bullshit chargers on ebay

 

yeah. Those ebay things are just boat bilge pumps. Go to iboats.com and you will see them. yeah, they blow a lot of cfm, but they can't force psi into the motor. Think about it, no way could you put your hand over a real turbo and block the air cause it forces it so much, but these fans you could turn them on pointing at the ground and it would stay on the ground. jsut doesn't have the force.

 

i'm not defending the electric supercharger because they are a POS but they only work at wide open throttle. If the supercharger only works periodically, then it can be driven off the battery. I have a 1100 amp battery in one of my cars. some of your clames are far fetched but regardless, the electric supercharger is a piece of crap but in the future, it is possible.

 

Do you guys think that this will work: http://www.boatdealers.com/mall/inde...ategory=blower
Its 12 amps. ANd blows 250 cfm, which isn't much, but its all if it can move that much of air under load. Thats why the other electric turbos suck, yeah they blow tons of cfm, but who cares, they can't do crap if they are under load. Take a look. It looks sweet. And its not like it will hurt anything, and if it helps at all, it would be worth it. But let me know if its worth buying. It would probably sound cool too.

 

no, it will not work. I promise it will not move any air under load.

 

do you think that it will even blow any extra air and lean out the mixture and maybe at least give better gas mileage?

 

maybe, but i think it would restrict air flow at high rpms.

 

yeah. probably, but if I did install something like this, I would run 2 seperate tubes into the intake, one tube my CAI, and one tube going to the electric turbo, so it doesn't restrict air flow.