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Matra-Simca MS 670B
The Matra-Simca MS 670 was a Prototype race car that won the Le Mans 24 Hours 3 times in a row (from 1972 to 1974) as well as the World Manufacturers Championship twice (1973 and 1974).
The car was designed by Bernard Boyer and Jean-Louis Caussin. The long tail version, designed specifically for Le Mans, was still called ‘670 B’, ‘B’ being the distinctive letter of all Matras fitted with the Porsche 5-speeds gearbox.
The chassis was an aluminium monocoque, with fibreglass body.
The engine, whose sound was extremely loud, was a 60° 3-litres V12, with aluminium block and heads, 79.7 mm bore and 50.0 mm stroke.
The motor version used in ‘74 at Le Mans was ‘MS 73’, with maxi- mum torque of 320 Nm at 8400 RPM , and maximum power of 450 HP at 10500 rpm. On the Mulsanne straight the car could top 320 kph. Brakes had Girling ventilated discs, all-round; in 1974, the rear bra- kes were moved inboard. Rims dimensions were 132 x 112 at front and 152 x 152 at rear.
The car weighted 693 kg.
Three were the ‘670 B’s racing in Le Mans in 1974. Number 7 was driven by Henri Pescarolo and Gérard Larrousse who lead the race from start to finish, winning Le Mans for the third time in a row.