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In 1967, Pontiac moved on to a technologically simpler nodular cast iron (invented in late 1940s) crankshaft, which they continued to use until the Pontiac V8 engine was discontinued in 1982.The SD racing program was the source of factory supplied performance items such as 4 bolt main bearing caps and windage trays to reduce friction from ...
For this inline-4 engine, 1-3-4-2 could be a valid firing order. The firing order of an internal combustion engine is the sequence of ignition for the cylinders. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated. In a diesel engine, the firing order corresponds to ...
Delage straight-eight racing engine Straight-eight engine with firing order 1-4-7-3-8-5-2-6. The straight-eight engine or inline-eight engine (often abbreviated as I8) is an eight-cylinder internal combustion engine with all eight cylinders mounted in a straight line along the crankcase.
Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.
A Silver streak 8 in a 1949 Pontiac Streamliner - note the large intake silencer leading to an oil-bath air cleaner on the left side of the engine. The Pontiac straight-8 engine is an inline eight-cylinder automobile engine produced by Pontiac from 1933 to 1954. Introduced in the fall of 1932 for the 1933 models, it was Pontiac's most powerful ...
The cylinder firing order was changed to 1-8-7-2-6-5-4-3 [43] so that the LS series now corresponds to the firing pattern of other modern V8 engines (for example the Ford Modular V8). 3.898 in. bore blocks (1997–2005)
90° V angle: This design historically derives from chopping two cylinders off a 90° V8 engine, in order to reduce design and construction costs. An early example is the 3.3 L (200 cu in) and 3.8 L (229 cu in) Chevrolet 90° V6 engines , which have an 18° offset crankshaft resulting in an uneven firing interval.
Boxer crankshaft configuration. Most flat-twin engines use a boxer configuration for the crankshaft and are therefore called "boxer-twin" engines. In a boxer-twin engine, the 180° crankshaft moves the pistons in phase with each other, therefore the forces generated by one piston are cancelled out by the other, resulting in excellent primary balance.