This unit would make some power:
ProCharger F-3R-136
Base HP Range of NA Engine: 700 – 1,000 HP
Maximum Supercharged HP Rating: 3,000+ HP
Maximum Airflow: 4,000 cfm
Maximum Boost: 50 psi
Inlet Diameter: 6 inches
Outlet Diameter: 4 inches
Maximum Impeller RPM: 72,000
Internal Step-up Ratio: 5.63:1
Self-Contained Oiling: Yes
Reverse Rotation Available: Yes
Tom Vaught
http://www.procharger.com/racedrive.shtml