Chevrolet Turbo-Air 6 engine

Turbo-Air 6
Turbo-Air 6
Overview
Manufacturer	Chevrolet
Designer	Al Kolbe
Also called	Corvair engine; Pancake six;
Production	1960–1969 Tonawanda Engine; (engine block and heads); Massena Castings Plant
Layout
Configuration	Flat-6
Displacement	139.6 cu in (2,287 cc) (1960); 144.7 cu in (2,372 cc) (1961–1963); 163.7 cu in (2,683 cc) (1964–1969);
Cylinder bore	3.375 in (85.7 mm) (1960); 3.4375 in (87.31 mm) (1961–1969);
Piston stroke	2.6 in (66 mm) (1960–1963 NA, 1960–1964 Turbo); 2.94 in (74.7 mm) (1964–1969 NA, 1965–1969 Turbo);
Cylinder block material	Aluminum (crankcase); Iron (cylinder sleeves);
Cylinder head material	Aluminum
Valvetrain	OHV, pushrods, hydraulic tappets
Compression ratio	8.0:1, 8.25:1, 9.0:1, 9.25:1, 10.5:1
Combustion
Turbocharger	Single (some models)
Fuel system	2 Rochester H or HV carburetors; 4 Rochester H or HV carburetors; 1 YH Carter Carburetor (Turbo);
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Air-cooled
Output
Power output	80 hp (60 kW); 84 hp (63 kW); 95 hp (71 kW); 98 hp (73 kW); 102 hp (76 kW); 110 hp (82 kW); 140 hp (100 kW); 150 hp (110 kW) (Turbo); 180 hp (130 kW) (Turbo);
Torque output	125–232 lb⋅ft (169–315 N⋅m)
Dimensions
Dry weight	366 lb (166 kg)

The Chevrolet Turbo-Air 6 is a flat-six air-cooled automobile engine developed by General Motors (GM) in the late 1950s for use in the rear-engined Chevrolet Corvair of the 1960s. It was used in the entire Corvair line, as well as a wide variety of other applications.

The engine's use of air cooling made it appealing to aircraft amateur builders, and small-volume engine builders established a cottage industry modifying Corvair engines for aircraft.