Pontiac straight-6 engine

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Pontiac straight-6 engine
Overview
Manufacturer	Pontiac (General Motors)
Production	1926-1969
Layout
Configuration	Naturally aspirated Straight-6
Displacement	186.7 cu in (3.1 L) 200 cu in (3.3 L) 208 cu in (3.4 L) 215 cu in (3.5 L) 223 cu in (3.7 L) 230 cu in (3.8 L) 239 cu in (3.9 L) 250 cu in (4.1 L)
Cylinder bore	3.25 in (82.6 mm) (186 cuin.)
Piston stroke	3.75 in (95.3 mm) (186 cuin.)
Cylinder block material	Cast iron
Cylinder head material	Cast iron
Valvetrain	Sidevalve OHV or SOHC (1964-1969)
Compression ratio	4.8:1, 4.9:1, 6.2:1, 6.5:1, 6.8:1, 7.0:1, 7.7:1 10.5:1
Combustion
Fuel system	Rochester Quadrajet or Carter Carburetors
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	40–230 hp (29.8–171.5 kW)
Torque output	150–193 lb⋅ft (203–262 N⋅m)

The Pontiac straight-6 engine is a family of inline-six cylinder automobile engines produced by the Pontiac Division of General Motors Corporation in numerous versions beginning in 1926.