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A single overhead camshaft (SOHC) design was introduced by Pontiac in the 1966 model year as the standard engine in the Tempest. Offered also in 1967, the 230 cu in (3.8 L) OHC 6 shared internal dimensions with the overhead valve Chevrolet straight-6 engine it was based on, [ citation needed ] but had unique cast iron block and head castings.
A camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3 mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310 hp (231 kW) with that cam), but ...
Competition Cams, Inc., often styled as COMP Cams, is a specialty performance automotive aftermarket, motorcycle, and kart parts manufacturer. The company has five US locations including headquarters in Olive Branch, Mississippi .
A 2.4-liter Twin Cam in 1997 Pontiac Sunfire The LD9 Twin Cam was a 2.4-liter Quad 4 variant which debuted in 1996 with balance shafts and a redesigned cylinder head. In the mid-1990s, these engines, like their earlier 2.3-liter counterparts, were known for timing chain failures, as well as water pump failures, in which the water pumps were ...
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A camshaft operating two valves. A camshaft is a shaft that contains a row of pointed cams in order to convert rotational motion to reciprocating motion.Camshafts are used in piston engines (to operate the intake and exhaust valves), [1] [2] mechanically controlled ignition systems and early electric motor speed controllers.
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They were followed in the early 1930s by Nash (with a dual-ignition unit), REO, and the Buick, Oldsmobile, and Pontiac divisions of General Motors. The Buick straight-eight was an overhead valve design, while the Oldsmobile straight-8 and Pontiac straight-8 straight-eights were flathead engines. Chevrolet, as an entry-level marque, did not have ...