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Buenos Aires, 13 January 1974: Niki Lauda, second in the Argentinian Grand Prix



Model

312 B3 - 1974

Type


Formula 1 racing car.

Years of activity


1974/1975.

First race


Argentine Grand Prix of 13.1.1974.

Engine


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.

Compression ratio


11.5:1.

Max. power output


490 bhp at 12,500 rpm.

Timing gear


4 valves per cylinder, 2 overhead cams per bank of cylinders, gear drive at rear of engine.

Fuel feed


Lucas indirect injection.

Ignition


Single. Magneti Marelli Dinoplex capacitive discharge electronic.

Lubrication


Pressurised. Dry sump.

Transmission


Rear. Borg & Beck multi-plate clutch. 627 gearbox with 5 speeds + reverse, positioned longitudinally with overhang, in block with self-locking differential.

Gear ratios


Variable depending on racing circuit.

Frame


Type 628/B. Stress-bearing body. Aluminium panels riveted to a steel tube structure.

Front suspension


Double wishbones: double triangles, inboard spring-damper units, anti-roll bar.

Rear suspension


Double wishbones: upper arm, lower trapezium, one upper strut and anti-roll bar.

Steering


Rack and pinion.

Brakes


Discs with Lockheed callipers. On wheels at front. Inboard at rear. Independent hydraulic circuits on the 2 axles.

Tyres


Front 9.2/20.0/13, rear 14.0/26.0/13. Goodyear.

Rims


Cast in light alloy. Front 10x13, rear 18x13.

Wheelbase


2,500 mm.

Front/rear track


1,606 mm / 1,604 mm.

Length


4,335 mm.

Width


2,056 mm.

Height


900 mm.

Weight with water and oil


582 kg.

Fuel tank (litres)


230. 2 side tanks. (Petrol: NO 98/100).

Battery


12 Volt Safa.

Bodywork


Aluminium single-seater body with composite components.