is there a motor that will do a job of power assist like the new hybrid cars?

belt driven mounted in place of ac compressor and/or ps pump?

with a switch or a clutch like toyota supercharger?

combined with neptune or s300 that has secondary maps can that be used to add few ponies for a drag car?

that way it can be driven like a normally aspirated engine until the electric motor is engaged

 

No there isn't. Its a good idea on paper to some degree, but you would have to add batteries and capacitors to a car, which would negate any additions in economy or power realistically.

IF the alternator produced power for an electric motor drive, you would lose more "power" making it work than it is worth. The internal combustion engine needs to die already, with its pathetic 25% efficiency.