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Spark plug with single side electrode An electric spark on the spark plug. A spark plug (sometimes, in British English, a sparking plug, [1] and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within ...
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.
Champion went to work producing spark plugs to be used in Buick automobiles. In 1910, the company moved to Toledo, Ohio to be close to the Willys-Overland Auto Company. [1] In 1931, Champion introduced its first suppressor-type spark plugs. It used a carbon-based resistor to reduce the effects of ignition noise on radio waves. [2]
The head castings and valve head sizes from 1969 to 1976 were different, notably in passages for air injection and spark plug diameters (1969–1974 18 mm, 1975 and up 14 mm). From 1977 onward, the 351W shared the same head casting as the 302, differing only in bolt hole diameters (7/16 inch for the 302, 1/2 inch for the 351W).
In 1935, Royce G. Martin, President of the Electric Autolite Company, decided the company should enter the business of manufacturing spark plugs. Robert Twells, a ceramic engineer, led the development team. In 1936, the first spark plug was produced at their Fostoria, Ohio plant. A few months later, the company sold their first spark plug.
The Z18 was also available in some of the commercial vehicle engine lineups; those models were of a single plug cylinder head design. This version was also built to run on LPG, mainly for taxi use. Called the Z18P such an engine produces 84 PS gross (62 kW; 83 hp) at 5600 rpm and 132 N⋅m (13.5 kg⋅m; 98 lb⋅ft) at 2800 rpm when installed in ...