Spa-Francorchamps , 5 June 1955: Paul Frere, fourth in the Belgium Grand Prix |
Model 555 F1
Formula 1 racing car.
Years of activity 1955/1956.
First race Bordeaux Grand Prix of 24.4.1955.
Engine Type 106. 4 cylinders in line, aspirated, front-mounted, light alloy cylinder block and head, 138 mm connecting rod, steel cylinder liners, water cooled.
Bore and stroke 100 x 79.5 mm.
Unitary and total capacity 624.39 / 2,497.56 cc.
Compression ratio 13:1.
Max. power output 260 bhp at 7,200 rpm.
Timing gear 2 valves per cylinder, 2 overhead camshafts with tappets and rollers, gear drive at front.
Fuel feed 2 twin-choke horizontal Weber 50 DCOA-3 carburettors.
Ignition Double with 2 Marelli magnetos.
Lubrication Forced, with dry sump.
Transmission Rear. Multi-plate clutch, gearbox with 5 speeds + reverse, rear- mounted in block with self-locking differential.
Gear ratios Variable depending on racing circuit.
Frame Steel tube frame.
Front suspension Double wishbones: double triangles, coil springs and anti-roll bar.
Rear suspension De Dion live axle, 2 longitudinal struts, transverse upper leaf spring, Houdaille hydraulic lever dampers.
Steering Worm and sector.
Brakes Finned bimetallic drums on all four wheels with hydraulic control.
Tyres Front 5.50x16", rear 7.00x16". Englebert.
Rims Spoked light alloy.
Wheelbase 2,160 mm.
Front/rear track 1,278 mm / 1,250 mm.
Length 3,988 mm.
Width 1,427 mm.
Height 1,020 mm.
Weight with water and oil 590 kg.
Fuel tank (litres) 180 with 2 side and 1 tail tank.
Bodywork Aluminium single-seater body with 2 side tanks.
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