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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 a modular design (thus, inline-3 and inline-4 guises share the same unitary displacement and components such as pistons and connecting rods, so are able to be produced on the same production line), with aluminum cylinder heads and blocks and 77.0 mm cylinder bore spacing for all types.
Weslake & Co also known as Weslake Research and Development was founded by Harry Weslake, described as England's greatest expert on cylinder head design, [1] [2] with premises in Rye, East Sussex, England. [3] Weslake is most famous for its work with Bentley, Austin, Jaguar and the Gulf-Wyer Ford GT40 Mk.I.
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.
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. Ports can be modified for maximum power, minimum fuel consumption, or a ...
A Heron cylinder head, or simply Heron head, is a design for the combustion chambers of the cylinder head on an internal combustion piston engine, named for engine designer S. D. Heron. The head is machined flat, with recesses only for inlet and exhaust valves, spark plugs, injectors and so on.
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 ...
The Toyota F series engine was a series of OHV inline-6-cylinder engines produced by Toyota between November 1949 and 1992. They are known for their high amount of torque at low engine speeds, massive cast-iron blocks and heads and also their high reliability. The F engine had one of the longest production runs of any Toyota engine.
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