Buenos Aires, 13 January 1974: Niki Lauda, second in the Argentinian Grand Prix
312 B3 - 1974
Formula 1 racing car.
Years of activity
Argentine Grand Prix of 13.1.1974.
Type 001/12. 12 cylinders in 180° V, rear-mounted, light alloy cylinder block and heads, press-fitted wet cast iron cylinder liners, 112 mm connecting rod, water cooled.
Bore and stroke
80 x 49.6 mm.
Unitary and total capacity
249.317 / 2,991.801 cc.
Max. power output
490 bhp at 12,500 rpm.
4 valves per cylinder, 2 overhead cams per bank of cylinders, gear drive at rear of engine.
Lucas indirect injection.
Single. Magneti Marelli Dinoplex capacitive discharge electronic.
Pressurised. Dry sump.
Rear. Borg & Beck multi-plate clutch. 627 gearbox with 5 speeds + reverse, positioned longitudinally with overhang, in block with self-locking differential.
Variable depending on racing circuit.
Type 628/B. Stress-bearing body. Aluminium panels riveted to a steel tube structure.
Double wishbones: double triangles, inboard spring-damper units, anti-roll bar.
Double wishbones: upper arm, lower trapezium, one upper strut and anti-roll bar.
Rack and pinion.
Discs with Lockheed callipers. On wheels at front. Inboard at rear. Independent hydraulic circuits on the 2 axles.
Front 9.2/20.0/13î, rear 14.0/26.0/13î. Goodyear.
Cast in light alloy. Front 10x13î, rear 18x13î.
1,606 mm / 1,604 mm.
Weight with water and oil
Fuel tank (litres)
230. 2 side tanks. (Petrol: NO 98/100).
12 Volt ìSafaî.
Aluminium single-seater body with composite components.