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Spa-Francorchamps , 5 June 1955: Paul Frere, fourth in the Belgium Grand Prix



Model

555 F1


Type


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.