Start with a RS, remove engine/trans/gas tank/exhaust system/smog equipment/radiator, replace all panels with CF, light wheels, light seats, lexan windows, target weight 1500 lbs. Then add EVdrive 350kw motor to drive front wheels and 350kw motor to drive rear wheels. 610 ft/lbs of torque, 940hp (with a 160 lbs electric motor). Now for the weight - Add 50kwh of lifepo4 cells to the car, and a 10kw solar panel on the garage to provide enough power to daily drive long distances purely on sunlight.