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However, the advent of fuel injection and electronic ignition has made most of the reverse-flow head's advantages redundant in a modern engine and as a result the design has lost its popularity. The reverse-flow head still enjoys some popularity among enthusiasts including Leyland Mini, Chrysler Slant-6, Holden and Ford Inline 6 fans.
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.
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Piston valves are one form of valve used to control the flow of steam within a steam engine or locomotive. They control the admission of steam into the cylinders and its subsequent exhausting, enabling a locomotive to move under its own power. The valve consists of two piston heads on a common spindle moving inside a steam chest, which is ...
A sleeve valve takes the form of one (or in the case of double sleeve valves, two) machined cylinders which fit concentrically between the piston and the cylinder block bore of an internal combustion engine having cross-flow induction/exhaust. These sleeves have inlet and exhaust ports machined in the periphery, analogous to a two-stroke motor ...
Summit Racing Equipment currently sponsors NHRA Camping World Drag Racing Series Funny Car driver Tim Wilkerson, [3] Top Fuel drivers Antron Brown [4] and Clay Millican, [5] and Pro Stock drivers Greg Anderson, Deric Kramer, Matt Hartford, Kyle Koretsky, Dallas Glenn, and Rodger Brogdon.
Only ca. 20% of the flow passes through the propeller turbine and therefore requires screening but fish and aquatic life can pass safely through the venturi (80% of the flow), preventing the need for large screens. Venturi turbines can be used at low heads (1.5–5 metres) and medium to high flows (1m 3 /s–20 m 3 /s). Multiple turbines can be ...
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