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A boxer-style flat-six engine is able to have perfect primary and secondary balance.As in other six-cylinder engines, the overlapping of the power strokes of the different cylinders (with a firing interval of 120 degrees in a four-stroke engine) reduces the pulsating of the power delivery relative to that of similar engines with fewer cylinders.
[5] [6] The most common design of flat engine for motorcycles is the boxer-twin, beginning with the 1905 Fée flat-twin engine, manufactured by the Light Motors Company, which was the first production motorcycle engine. [7] BMW Motorrad have a long history of boxer-twin motorcycles, beginning in 1923 with the BMW R32 [5]
The Porsche flat-six engine series is a line of mechanically similar, naturally aspirated and sometimes turbocharged, flat-six boxer engines, produced by Porsche for almost 60 consecutive years, since 1963. [8] [9] The engine is an evolution of the flat-four boxer used in the original Volkswagen Beetle. [10] [11] [12
Vehicle Type Type MY Engine numbers Technical data Cayenne S M48.00 03 3 813 00501>60000 8 Cyl/4,5L /250 KW Cayenne Turbo M48.50 03 3 823 00501>60000 8 Cyl/4,5L /331 KW Cayenne M02.2Y 04 4 BFD 00501>60000 6 Cyl/3,2L /184 KW Cayenne S M48.00 04 4 814 00501>60000 8 Cyl/4,5L /250 KW Cayenne Turbo M48.50 04 4 824 00501>60000 8 Cyl/4,5L /331 KW ...
Unlike prior Subaru flat-6 designs, the EZ30 has a significantly smaller bore pitch (the distance between adjacent cylinder centerlines on each bank of the engine block) than the contemporary flat-4 EJ-series. The bore pitch of the EZ30 is 98.4 mm (3.87 in), [36] compared to a bore pitch of 113 mm (4.4 in) in the EJ series.
The crankshaft configuration varies amongst opposed-engine designs. One layout has a flat/boxer engine at its center and adds an additional opposed-piston to each end so there are two pistons per cylinder on each side. An X engine is essentially two V engines joined by a common crankshaft. A majority of these were existing V-12 engines ...
The base engine is a 2.7-litre 176 kW (239 PS; 236 hp) flat-six boxer engine, with the Boxster S getting a 3.2-litre 206 kW (280 PS; 276 hp) engine. For 2007, the base Boxster received a revised engine featuring VarioCam Plus and the Boxster S engine was upgraded from 3.2-litre to 3.4-litre.
The Volkswagen air-cooled engine is an air-cooled, gasoline-fuelled, boxer engine with four horizontally opposed cast-iron cylinders, cast aluminum alloy cylinder heads and pistons, magnesium-alloy crankcase, and forged steel crankshaft and connecting rods.