  Kyalami, 1 March 1969: Chris Amon in the South African Grand Prix |
 Model 312 F1 - 1969
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 5.00-10.00-13î, rear 6.00-13.50-15î. Firestone.
Rims Cast light alloy. Front 10x13î. Rear 14x15î.
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.
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