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1991 | F642 / F643 |
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28
Jean Alesi
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USA
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San
Marin
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Monaco
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Mexique
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Grande
Bretagne
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Allemagne
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Hongrie
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Belgique
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Italie
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Espagne
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Fiche technique F642/F643
Engine :
Rear-mounted. 12 cylinders
in 60° V. Special cast iron cylinder block without press-fitted
cylinder liners, light alloy head. Water cooled.
Bore and stroke :
86 x 50.2 mm.
Unitary and total capacity :
291.6 / 3,499.2 cc.
Compression ratio :
13:1.
Max. power output :
710 bhp at 13,800 rpm.
Timing gear :
5 valves per cylinder
(3 intake). 2 overhead camshafts, gear drive at front.
Fuel feed :
Weber-Marelli digital
electronic injection with two injectors per cylinder.
Ignition :
Single. Magneti Marelli
electronic static.
Lubrication :
Pressurised. Dry sump.
Transmission :
Rear. Three-plate carbon
clutch with mechanical and automatic control. Rear longitudinal
overhanging gearbox with 7 speeds + reverse, automatic with
electronic management. ZF self-locking differential.
Frame :
Monococque in composite: carbon fibre
and Kevlar honeycomb.
Front suspension :
Double wishbones: 2 overlapping
elliptic section triangles, strut or push-rod springing.
Rear suspension :
Double wishbones: upper
triangle, lower trapezium, strut or push-rod springing.
Steering :
Rack and pinion.
Brakes :
Ventilated outboard carbon
discs, Brembo monobloc 4-piston callipers.
Tyres:
Front 25x10î, rear 26x15î.
Goodyear.
Wheelbase :
2,881 mm.
Front/rear track :
1,800 mm / 1,675 mm.
Length :
4,400 mm.
Width:
2,130 mm.
Height :
1,004 mm.
Weight with water and oil :
505 kg.
Fuel tank :
215 litres, with 1 centre
and 1 side tanks. Fuel 102 RON.
Alternator/dynamo:
Marelli 50/70 W.
Battery :
Yuasa - 12 Volt.
Bodywork :
Composite. Fully detachable
and removable.
©
Olivier Faugeras
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