Dijon, 20 May 1984 - René Arnoux, 4th in the French Grand Prix. |
Model 126 C4
Type Formula 1 racing car.
Years of activity 1984.
First race Brazilian Grand Prix of 25.3.1984.
Engine Type 031. 6 cylinders in 120° V, rear-mounted. Light alloy cylinder block and heads, press-fitted aluminium cylinder liners. Water cooled.
Bore and stroke 81 x 48.4 mm.
Unitary and total capacity 249.4 / 1,496.43 cc.
Compression ratio 6.7:1.
Max. power output In a race 660 bhp at 11,000 rpm. Max. pressure 3.2 bar.
Timing gear 4 valves per cylinder, 2 overhead cams per bank of cylinders. Gear drive at rear.
Fuel feed 2 KKK central upper turbos and Lucas-Ferrari or digital Weber-Marelli indirect injection plus Emulsistem.
Ignition Single. Magneti Marelli electronic.
Lubrication Forced. Dry sump.
Transmission Rear. Multi-plate clutch. 633 gearbox with 5 speeds + reverse, transverse in block with self-locking differential.
Gear ratios Variable depending on racing circuit.
Frame Type 633. Monococque in Kevlar-carbon fibre composite.
Front suspension Double wishbones: double overlapping triangles, pull-rod spring control.
Rear suspension Double wishbones: upper trapezium, lower triangle, pull-rod spring control.
Steering Rack and pinion.
Brakes Ventilated cast iron discs, Brembo 4-piston cast aluminium callipers .
Tyres Front 25.0-9.0-13î, rear 26.0-15.0-13î - Goodyear.
Rims Multi-piece. Front 12.5x13î, rear 16.5x13î.
Wheelbase 2,600 mm.
Front/rear track 1,768.4 mm / 1,680.2 mm.
Length 4,115 mm.
Width 2,125 mm.
Height 1,080 mm.
Weight with water and oil 540 kg.
Fuel tank (litres) 220. Mid-mounted. Fuel 102 octane RON.
Bodywork Composite, only for side panelling of systems.
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