Racers and custom builders looking to make huge power, look no further than ProCharger. After debuting the design prototype of the world's largest, self-contained, gear-driven centrifugal supercharger at last year's PRI show, ProCharger has announced the production version of the updated ProCharger F-4 supercharger. Designed specifically for ultra-high horsepower applications, the new F-4 supercharger has spent nearly a year undergoing design verification and testing. In a recently conducted engine dyno session, the new F-4 produced a staggering 3,384 crankshaft horsepower at 7,800 rpm when fitted to a 521 cid BAE HEMI engine running methanol fuel. During this instrumented test session, the F-4 also produced 53 psi of boost while supplying airflow of 4,400 cfm. "The new F-4 takes us to an entirely new level – 3,200 plus horsepower, or in the case of this most recent engine dyno testing, just under 3,400 horsepower," notes Dave Werremeyer, Motorsports Operations Coordinator at ProCharger. "We are looking forward to working with some of the top engine builders and racers in the industry to see the F-4's true performance potential realized on the track and in other motorsports applications." Werremeyer notes that the current ProCharger F-3 superchargers have proven capable of 2,000 horsepower on pump gas and nearly 3,000 horsepower on engines specifically designed for use with a supercharger and running alcohol fuels. However, as an industry innovator, the engineering staff and R&D team at ProCharger recognized the desire of racers and engine builders for an even larger centrifugal supercharger design. "The new F-4 is the next step in providing today's racers with the centrifugal supercharger solution they need to produce 3,200 to 3,500 horsepower," says Ken Jones, CEO at ProCharger. "Building on the proven power and durability of the legendary F-3 family of superchargers, the F-4 provides some distinct and quantifiable aerodynamic and compressor performance advantages when compared to the F-3 superchargers." The new ProCharger F-4 supercharger features the performance and racing industry's first production application of a 16-inch diameter volute, or compressor housing. Utilizing ProCharger's patented and proven self-contained transmission, as well as the patented high-speed compound bearing assembly, the new ProCharger F-4 is also designed specifically for a gear drive mounting configuration. NEW ProCharger F-4 Supercharger: specifications Volute Diameter: 16-inches Max HP: 3,200+ HP Base NA HP: 900-1,400 HP Max Flow: 5,400 CFM Max Boost: 50+ PSI Inlet Hose Dia: 7-inches Inducer Dia: 6.32-inches Exducer Dia: 8.89-inches Outlet Hose Dia: 5-inches Outlet ID: 4.26-inches Max Impeller RPM: 55,000 RPM Internal Step-Up Ratio: 5.63:1 Reverse Rotation Available: Yes Self-Contained: Yes Oil Capacity: 4 ounces (larger capacity available for extended run-time applications) For comparison: ProCharger F-3R-139 Supercharger specifications: Volute Diameter: 12-inches Max HP: 2,700+ HP Base NA HP: 700-1,000 HP Max Flow: 4,000 CFM Max Boost: 45 PSI Inlet Hose Dia: 6-inches Inducer Dia: 5.47-inches Exducer Dia: 7.20-inches Outlet Hose Dia: 4-inches Outlet ID: 3.59-inches Max Impeller RPM: 62,500 RPM Internal Step-Up Ratio: 5.63:1 Reverse Rotation Available: Yes Self-Contained: Yes Oil Capacity: 4 ounces