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SOHC design (for a 1973 Triumph Dolomite Sprint) . The oldest configuration of overhead camshaft engine is the single overhead camshaft (SOHC) design. [1] A SOHC engine has one camshaft per bank of cylinders, therefore a straight engine has a total of one camshaft and a V engine or flat engine has a total of two camshafts (one for each cylinder bank).
A crossflow head gives better performance than a Reverse-flow cylinder head (though not as good as a uniflow), but the popular explanation put forward for this — that the gases do not have to change direction and hence are moved into and out of the cylinder more efficiently — is a simplification since there is no continuous flow because of valve opening and closing.
The main advantage of the reverse-flow cylinder head is that both the entering inlet charge and the exiting exhaust gas cause a tendency to swirl in the same direction in the combustion chamber. [1] In a crossflow head the inlet and exhaust gases promote swirl in opposite directions so that during overlap the swirl changes directions.
It is Chevrolet's last production first-generation small-block. The cylinder heads feature combustion chambers and intake ports very similar to those of the LT1 V8, but lacking the LT1's reverse-flow cooling and higher compression. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade.
In police slang usage, twoc became a verb, with twocking and twockers (also spelled twoccing and twoccers) used respectively to describe car theft and those who perpetrate it: these usages subsequently filtered into general British slang. [2]
The Family II is a straight-4 piston engine that was originally developed by Opel in the 1970s, debuting in 1981. Available in a wide range of cubic capacities ranging from 1598 to 2405 cc, it simultaneously replaced the Opel CIH and Vauxhall Slant-4 engines, and was GM Europe's core mid-sized powerplant design for much of the 1980s, and provided the basis for the later Ecotec series of ...
The cylinder heads also sport a more conventional three-port exhaust manifold. Output was rated at 140 hp (104 kW; 142 PS) at 4600 rpm and 170 lb⋅ft (230 N⋅m) at 2600 rpm for the light trucks (1986–92 Ranger and 1986–90 Bronco II) and 144 hp (107 kW; 146 PS) at 4800 rpm for the Merkur Scorpio in the US market and 150 to 160 hp (112 to ...
To reduce weight, the engine uses aluminum for both the engine block and cylinder head, magnesium valve covers [7] and a plastic intake manifold. [2] The M60 was BMW's first car engine to use a "split conrod" design, [ 2 ] where sintered connecting rods are made as a single piece and then fractured in order to ensure increased rigidity and an ...