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Kyalami, 1 March 1969: Chris Amon in the South African Grand Prix



Model

312 F1 - 1969


Type


Formula 1 racing car.

Years of activity


1969.

First race


South African Grand Prix of 1.3.1969.

Engine


Type 255/C. Rear-mounted. 12 cylinders in 60° V, light alloy cylinder block and head, press-fitted special cast iron cylinder liners, 116 mm connecting rod, lateral exhausts, water cooled.

Bore and stroke


77 x 53.5 mm.

Unitary and total capacity


249.129 / 2,989.556 cc.

Compression ratio


11.8:1.

Max. power output


436 bhp at 11,000 rpm.

Timing gear


4 valves per cylinder, 2 overhead camshafts per bank of cylinders, chain drive.

Fuel feed


Lucas indirect injection.

Ignition


Single. Coil-ignition, Marelli coil and Dinoplex transistorised capacitive discharge.

Lubrication


Forced with radiator. Dry sump.

Transmission


Rear. Borg & Beck multi-plate clutch. 609 rear longitudinal overhanging gearbox with 5 speeds + reverse, ZF plunger-type differential.

Gear ratios


Variable depending on racing circuit.

Frame


Type 609. Stress-bearing body: aluminium panels in double wall riveted to steel tube structure.

Front suspension


Double wishbone: upper arm, lower triangle, inboard spring/damper units and anti-roll bar.

Rear suspension


Double wishbone: upper arm, inverted lower triangle, 2 longitudinal struts and anti-roll bar.

Steering


Rack and pinion.

Brakes


Girling discs and callipers. Inboard at rear on differential housing, independent hydraulic circuits.

Tyres


Front 5.00-10.00-13, rear 6.00-13.50-15. Firestone.

Rims


Cast light alloy. Front 10x13. Rear 14x15.

Wheelbase


2,400 mm.

Front/rear track


1,550 / 1,561 mm.

Length


4,060 mm.

Width


738 mm.

Height


910 mm.

Weight with water and oil


554 kg.

Fuel tank


180/220 litres. Pirelli rubber-canvas containers.

Battery


12 Volt Safa.

Bodywork


Aluminium single-seater body with composite elements.