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The knucklehead is a retronym used by enthusiasts to refer to a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker boxes. [1] The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder.
Carburetors used as intake runners A cutaway view of the intake of the original Fordson tractor (including the intake manifold, vaporizer, carburetor, and fuel lines). An inlet manifold or intake manifold (in American English) is the part of an internal combustion engine that supplies the fuel/air mixture to the cylinders. [1]
Ford — Dual-Stage Intake (DSI), on their Duratec 2.5 and 3.0-litre V6s, and it was also found on the Yamaha V6 in the Taurus SHO. The Ford Modular V8 engines and the V6 Cologne use either the Intake Manifold Runner Control ( IMRC ) for four-valve engines, or the Charge Motion Control Valve ( CMCV ) for three-valve engines.
A 600 CFM version of the 4300A with a 0.25" larger primary ventury and 0.20" larger primary and secondary throttle bores, was released in 1968. [1] By 1970, it was factory supplied on most Fords equipped with the 429 and 460, in addition to vehicles with the 351 Cleveland. [3] 4300A 600 CFM specs: [2] 1.25" primary venturi; Primary throttle ...
Its output of 0.45 hp per cubic inch was 7% better than the 0.42 hp per cubic inch of the popular and widely produced 100 hp (75 kW) 1949 Ford Flathead V8. 1952 88 and Super 88 V8s used a 4-barrel carburetor for 160 hp (120 kW) and 265 lb⋅ft (359 N⋅m), while 4-barrel 1953 versions raised compression from 7.5:1 to 8.0:1 for 165 hp (123 kW ...
The compression ratio started at 10.5:1 for 360 hp (268 kW), 375 hp (280 kW), and 400 hp (298 kW), but was reduced to 10.0:1 the following year. These 1959 engines produced 345–350 hp (257–261 kW), but power was down to 315 hp (235 kW) for 1960. Some 1958 Continental Mark IIIs came brand new with the Holley 4150 four-barrel carburetor.
The J30A4 pushed output to 242 hp (180 kW) and 212 lb⋅ft (287 N⋅m) using a three-way VTEC system, a higher (10.0:1) compression ratio and a novel exhaust manifold cast as one piece with the cylinder head. It weighs nearly 20 lb (9.1 kg) less and is an inch shorter than J30A1.
Design features of the B and RB engines include 17 capscrews per cylinder head, a cylinder block that extends 3 in (76.2 mm) below the crankshaft centerline, an intake manifold not exposed to crankcase oil on the underside, stamped-steel shaft-mounted rocker arms (race versions used forged steel rockers), and a front-mounted external oil pump driven by the camshaft.