ACL Ferrari 312PB

1972 Ferrari 312PB SpA Ferrari SEFAC
The racing debut of the engine was made in a 312 B Formula 1 racer. The 'B' represented the Forghieri V12 engine, though it was not a boxer engine. The Ferrari engine rested in an aluminum semi-monocoque, similar to the F1 car. In other words, it was basically a full body Formula One car. It had a five-speed gearbox, vented disc brakes, and weighed around 660 kilograms. The 460 horsepower engine was mounted mid-ship and sent power to the rear wheels.
The 312PB made its inaugural debut at the Brands Hatch 1000km race in April of 1971. The car was immediately competitive and proved its potential by finishing second behind an Alfa Romeo 33/3. This would be one of the few highlights for the car during the 1971 season. For 1972, things shifted in Ferrari's favor, as FIA rule changes abandoned the 5-liter sports car class. Only the 3-liter prototypes were able to run in the World Sports Car Championship.
During the 1971 season, and during the offseason, the car was continually modified and its shortcomings were identified and fixed. Horsepower was increased from an initial 450 to 460. Experimentations and testing were done with aerodynamics resulting in a very refined racer. Next, Ferrari worked on the cockpit, specifically the driver's selection. They hired the best and most talented drivers such as Brian Redman, Arthuro Merzario, Jacky Ickx, Tim Schenken, Mario Andretti and Ronny Peterson to help guarantee another manufacture's championship.