  John Surtees, Drivers' World Champion in 1964 |
 Model 158 F1
Type Formula 1 racing car.
Years of activity 1964/1965.
First race Siracusa Grand Prix of 12.4.1964.
Engine Type 205/B. Rear-mounted. 8 cylinders in 90° V, light alloy cylinder block and heads, cast iron cylinder liners, crankshaft with 5 bearings, 120 mm connecting rod, water cooled.
Bore and stroke 67 x 52.8 mm.
Unitary and total capacity 186.1544 / 1,489.2355 cc.
Compression ratio 10.5:1.
Max. power output 210 bhp at 11,000 rpm.
Timing gear 2 valves per cylinder, 2 overhead cams per bank of cylinders, chain drive.
Fuel feed Bosch direct injection, pump driven by toothed belt.
Ignition Double. Marelli coil-ignition (2 distributors and 4 coils).
Lubrication Pressurised with radiator. Dry sump.
Transmission Rear. Dry, multi-plate clutch, 579 overhanging longitudinal gearbox with 5 speeds + reverse, plunger type limited slip differential.
Gear ratios Variable depending on racing circuit.
Frame Type 579. Aluminium panels with double wall riveted to a steel tube structure to form a stress-bearing semi-monococque.
Front suspension Double wishbones: upper rocker arm, lower triangle, coaxial inboard coil springs and dampers.
Rear suspension Double wishbones: upper arm, inverted lower triangle, coaxial springs/dampers, 2 longitudinal struts per side.
Steering Rack and pinion.
Brakes Dunlop discs and callipers. Inboard at rear on the differential housing, independent circuits with double pump.
Tyres Front 5.50/6.00x13î, rear 7.00x13î. Dunlop.
Rims Cast in light alloy. Front 7.00x13î. Rear 8.50x13î.
Wheelbase 2,380 mm.
Front/rear track 1,350 mm / 1,350 mm.
Length 3,950 mm.
Width 697 mm.
Height 768 mm.
Weight with water and oil 468 kg.
Fuel tank (litres) 125 (2 side tanks). Petrol: NO 98/100.
Battery 12 Volt ìSafaî.
Bodywork Aluminium single-seater body with composite components.
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