Abstract: In an automotive power plant including an electric motor having a drive shaft connected to a transmission and a battery pack connected to the motor for vehicle speeds up to 30 miles per hour approximately, the improvement comprising an alternate power source including an electric generator connectable to the drive shaft having output leads connected to the battery pack and to the motor. An air compressor having a drive shaft is coupled to the motor drive shaft and has a pressurized air outlet connected to a reservoir. A boost pump is connected to the reservoir or air compressor to a combustion chamber having an electric ignition and a connection to a pressurized fuel source and includes a high velocity exhaust gas outlet. A turbine receives exhaust gases for driving an impellor secured upon the compressor shaft.