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Type: S-4 OHV 8 valves total,
2 valves per cylinder, 5 main bearings
Bore x stroke: 93.50mm x 85.50mm (3.68 in x 3.37 in)
Bore to stroke ratio: 1.09:1
Displacement: 2347 cc (143.223 cu in)
Unitary capacity: 586.75 cc/cylinder
Compression ratio: 8.80:1
Fuel system: Single Webber carburettor, mechanical fuel pump
Aspiration: Normal
Max. output: 116.6 PS (115.0 bhp) (85.8 kW) @5500 rpm
Max. torque: 183.0 Nm (135 lbft) (18.7 kgm) @3500 rpm
Coolant: Water/Glycol mix, Capacity 12 litres (21 pints)
Specific output: 49 bhp/litre (0.8 bhp/cu in)
Specific torque: 77.97 Nm/litre
Power to weight ratio: 87.32 bhp/ton
Distributor: Ducellier DX05i
Spark plugs: Marchal 35/1 or AC42FS, Champion L87Y, Eyquem 705S
Spark plug gap: 0.6 to 0.7 mm (0.024" to 0.028")
Dwell angle: 57° ± 2°
Firing order: 1-3-4-2
Ignition timing: 20° at 2000 rpm
Valve timing:
Inlet opens 0° 30' BTDC
Inlet close 42° 30' ABDC
Exhaust opens 38° 30' BBDC
Exhaust closes 4° 30' ATDC
Valve clearances: adjusted hot, inlet: 0.20mm (0.008") exhaust: 0.25mm
(0.010")
Oil pressure: 60°C to 65°C 4-5 bar (58-73 psi) at 4000 rpm
Oil capacity: 4.5 litres (7.9 pints), with oil filter 5 litres (8.8
pints)
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