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The CH-Type was a 90° V6 engine developed by Renault-Gordini for Renault's autosport activities. This François Castaing design was the predecessor of the famous EF series.

CH-Type engine
Overview
Manufacturer Renault-Gordini
Layout
Configuration90° V6
Displacement2.0 L (1,997 cc)
2.1 L (2,138 cc)
Cylinder bore86 mm (3.39 in)
89 mm (3.5 in)
Piston stroke57.3 mm (2.26 in)
ValvetrainDOHC 4 valves x cyl.
Combustion
TurbochargerOn CHS & CHS 2
Fuel typePetrol
Cooling systemWater-cooled
Output
Power output285–540 bhp (213–403 kW; 289–547 PS)
Torque output150–300 lb⋅ft (203–407 N⋅m)
Chronology
SuccessorEF series

In 1972, after an agreement was reached with Elf, François Castaing, technical director of Renault Gordini, was given the go-ahead to build a 2-litre engine that could be used in a "sports" model and then in Formula 2. His team opted for a 90° V6, which was released in 1973 and was named the "type CH1" in honour of Claude Haardt, who had died in an accident a few months earlier.


Engines



CH1



1973-1977

285 bhp (213 kW; 289 PS) @ 9,800 rpm (1973), 300 bhp (224 kW; 304 PS) @ 10,500 rpm (1977)

This V6 engine with four overhead camshafts and four valves per cylinder would prove highly successful. Its record reads as follows:

in 13 races.


CHS



1975-1978

500 bhp (373 kW; 507 PS) @ 9,500 rpm (1975-1978)

Used for the 1975 and 1976 World Championship for Makes and the 1977 and 1978 Le Mans 24 Hours, this engine fully accomplished its second goal, with:


CHS 2



1975-1978

520 bhp (388 kW; 527 PS)/540 bhp (403 kW; 547 PS) @ 9,500 rpm (1978)

Taking full advantage of engine capacity regulations by extending the bore to 89 mm (3.5 in) while maintaining the same stroke of 57.3 mm (2.26 in), this engine enabled the only Alpine A443 entered at Le Mans in 1978 to tire out the Porsches and help the Alpine A442 B to victory.




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