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  McLaren M23 Cosworth
 

  Article Image gallery (147) Chassis (9) Specifications  
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Country of origin:Great Britain
Produced from:1973 - 1977
Numbers built:13
Designed by:Gordon Coppuck for McLaren
Predecessor:McLaren M19C Cosworth
Successor:McLaren M26 Cosworth
Author:Wouter Melissen
Last updated:October 27, 2014
Download: All images

Engine
Configuration Ford Cosworth DFV 90º V8
Location Mid, longitudinally mounted
Weight 168 kilo / 370.4 lbs
Construction aluminium block and head
Displacement 2,993 cc / 182.6 cu in
Bore / Stroke 85.7 mm (3.4 in) / 64.8 mm (2.6 in)
Compression 11.0:1
Valvetrain 4 valves / cylinder, DOHC
Camshaft Gear driven
Fuel feed Lucas Fuel Injection
Lubrication Dry sump
Aspiration Naturally Aspirated
Power 465 bhp / 347 KW @ 10,500 rpm
BHP/Liter 155 bhp / liter

Drivetrain
Body fibreglass
Chassis aluminium monocoque
Front suspension double wishbones, coil springs over dampers, anti-roll bar
Rear suspension reversed lower wishbones, single top links, twin radius arms, coil springs over dampers, anti-roll bar
Steering rack-and-pinion
Brakes ventilated discs, all-round
Gearbox Hewland FG 400 5 speed Manual
Drive Rear wheel drive

Dimensions
Weight 575 kilo / 1,268 lbs
Wheelbase / Track (fr/r) 2,565 mm (101 in) / 1,575 mm (62 in) / 1,578 mm (62.1 in)
Wheels (fr/r) 10 x 13 / 17 x 13
Tyres (fr/r) 10.0/20.0 - 13 / 16.2/26.0 - 13

Performance figures
Power to weight 0.81 bhp / kg

Race history
Major wins
1973 Swedish Grand Prix (Denny Hulme in M23/1)
1973 British Grand Prix (Peter Revson in M23/2)
1973 Canadian Grand Prix (Peter Revson in M23/4)
1974 Argentine Grand Prix (Denny Hulme in M23/6)
1974 Brazilian Grand Prix (Emerson Fittipaldi in M23/5)
1974 Belgian Grand Prix (Emerson Fittipaldi in M23/5)
1974 Canadian Grand Prix (Emerson Fittipaldi in M23/8)
1975 Argentine Grand Prix (Emerson Fittipaldi in M23/9)
1975 Spanish Grand Prix (Jochen Mass in M23/8)
1975 British Grand Prix (Emerson Fittipaldi in M23/9)
1976 Spanish Grand Prix (James Hunt in M23/8)
1976 French Grand Prix (James Hunt in M23/6)
1976 German Grand Prix (James Hunt in M23/6)
1976 Dutch Grand Prix (James Hunt in M23/6)
1976 Canadian Grand Prix (James Hunt in M23/10)
1976 USA Grand Prix (James Hunt in M23/8)

Resources
Suggested reading
  • McLaren, the Grand Prix, Can-Am and Indy Cars, by Doug Nye
  • McLaren - The cars 1964 - 2008, by William Taylor
Related articles
Useful links

  Article Image gallery (147) Chassis (9) Specifications