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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).
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.
Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads , as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability.
In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern overhead valve and overhead camshaft engines, the head is a more complicated metal block that also contains the inlet and exhaust passages, and often coolant passages , Valvetrain components, and fuel injectors .
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.
Women online have taken to filming ghoulish murder-fantasy videos in which they romanticize lacing men's beverages with deadly poison as a justifiable response to fears about abortion rights under ...
That huge hit wasn't the end of the fireworks. The replay seemed to show that Nixon recovered the ball as the scrum started to pile on top of him.
The Lotus 900 series of engines replaced the Twin Cam in Lotus' cars after 1973. Vegantune developed their own DOHC cylinder head on the Ford block for an engine called the VTA launched in 1983. Supplied to Caterham Cars as a replacement for the Twin Cam in the Caterham Seven, the VTA featured belt-driven cams. [1]