McLaren M9A Cosworth DFV 1969

[Pete05]

This is the McLaren M9A as used in the 1969 British Formula One Grand Prix by Derek Bell. This is the only McLaren ever fitted with a 4 wheel drive system. McLaren was not the only one experimenting with 4 wheel drive systems in 1969, Matra and Lotus had 4 wheel drive cars. The Cosworth DFV V8 engine was mounted reversed in the chassis and the transmission followed Ferguson lines.
The M9A failed to finish with suspension failure.
Four wheel drive was not a success and it was banned from the 1970 season.

ENGINE

Configuration
Ford Cosworth DFV 90 degree V8

Location
Mid, longitudinally mounted

Engine Weight
168 kg / 370.4 lbs

Construction
Aluminium block and heads

Displacement
2993 cc / 182.6 cu in

Bore / Stroke
85.7 mm (3.4") x 64.8 mm (2.6")

Compression
11.5:1

Valvetrain
4 valves per cylinder, DOHC

Fuel feed
Lucas Fuel Injection

Lubrication
Dry sump

Aspiration
Naturally Aspirated

Power
430 bhp / 321 kW @ 10000 rpm

Gearbox
McLaren/Hewland 5 speed manual

Weight
570 kg / 1256.6 lbs

http://en.wikipedia.org/wiki/Four-wheel_drive_in_Formula_One