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The Cosworth Vega engine was produced in 1975 and 1976 using the 2300 engine block. The engine was de-stroked to 3.16 inches (80 mm) giving 2.0 L; 121.7 cu in (1,994 cc), with a 16-valve aluminum cylinder head, double overhead cams , forged components and solid lifters. It produced 110 hp (82 kW) and 107 lb⋅ft (145 N⋅m).
The Cosworth Vega Twin-Cam engine is a 122 cu in (1,999 cc) inline-four with die-cast aluminum alloy cylinder block and Type 356 aluminum alloy, 16-valve cylinder head with double overhead camshafts held in a removable cam-carrier that doubles as a guide for the valve lifters. Each camshaft has five bearings and is turned by individual cam ...
The Chevrolet Vega is a subcompact automobile that was manufactured and marketed by GM's Chevrolet division from 1970 to 1977. Available in two-door hatchback, notchback, wagon, and sedan delivery body styles, all models were powered by an inline four-cylinder engine designed specifically for the Vega, with a lightweight, aluminum alloy cylinder block.
An advanced design for the time, the Cosworth Vega engine used dual overhead camshafts, 4 valves per cylinder, and electronic fuel injection; in total, 5000 engines were assembled for 1975. [5] For 1975, the introduction of the Chevrolet Monza saw the introduction of V8 engines to H platform (not offered in the Vega and Astre).
In both the interest of fuel economy and weight reduction, the B/C-platform ended the use of "big-block" V8 engines outside of the Cadillac division; after 1980, a 350 cubic-inch V8 was the largest engine fitted in a B-body chassis. In 1985, General Motors underwent a further downsizing of many of its nameplates using the B-platform chassis.
The Quad 4 is the first domestic regular production DOHC four-cylinder engine wholly designed and built by GM, the only similar prior example being the Chevrolet Cosworth Vega, whose DOHC head was designed by Cosworth in England. In addition to the 2.3-liter DOHC Quad 4s, there was also a short-lived 2.3-liter SOHC variant called the "Quad OHC ...
By your logic the engine in the Cosworth Vega led to the Quad 4 which led to the Ecotec - they are all GM DOHC inline-4 engines. This could not be further from the truth. The engine in the Cosworth Vega was a Vega engine topped by a Cosworth DOHC head - designed specifically for a particular, high-performance purpose, limited edition option.
Another example is a 1977 Eagle 72 chassis raced by Bruce Crower in the United States. This engine used the cylinder heads from two Chevrolet Cosworth Vega engines. [5] [6] [7] In 1969, a one-off engine was built for racing driver Emerson Fittipaldi to compete in the Thousand Miles of Guanabara endurance race. [8]