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Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). The P-47 was already in production with a Pratt & Whitney radial engine when the XIV-2220 flew successfully in trials in 1945 as a possible upgrade, but the war was winding down and it did not go into production.
Chrysler's Multi-Displacement System (MDS) is an automobile engine variable displacement technology. It debuted in 2005 on the 5.7 L modern Hemi V8.Like Mercedes-Benz's Active Cylinder Control, General Motors' Active Fuel Management, and Honda's Variable Cylinder Management, it deactivates four of the V8's cylinders when the throttle is closed or at steady speeds.
A hemispherical head ("hemi-head") gives an efficient combustion chamber with minimal heat loss to the head, and allows for two large valves.However, a hemi-head usually allows no more than two valves per cylinder due to the difficulty in arranging the valve gear for four valves at diverging angles, and these large valves are necessarily heavier than those in a multi-valve engine of similar ...
The Super 8 Hemi came equipped with a Chrysler 5.7-liter EZB/EZD HEMI OHV V8 engine developing up to 353 hp (263 kW; 358 PS), 395 lb⋅ft (536 N⋅m) torque and has a top speed of 154 mph (248 km/h). It will go from 0-60 in about 5.7 seconds and mated with a four-speed automatic transmission with an Autostick .
The Hemi-6 is a pushrod O.H.V. (overhead valve engine), with combustion chambers comprising about 35% of the top of the globe. This creates what is known as a low hemispherical shaped chamber. In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines.
An SRT version was unveiled at the 2011 New York International Auto Show, featuring the 6.4 L 392 Hemi V8 engine. The 6.4 L 392 Hemi engine is also used in other Chrysler Group SRT vehicles such as the Dodge Charger and Challenger. With 470 hp (350 kW), the new 300 SRT can go from 0 to 60 mph (97 km/h) in the low 4-second range. [49]
The original Charger 500 prototype was a 1968 Charger R/T with a 426 Hemi and automatic transmission. The prototype was painted in B5 Blue with a white stripe and a white interior. The Charger 500 was one of three models introduced in September 1968. The standard engine was the 440 Magnum, but factory literature described the 426 Hemi as standard.
Work Completed: Limited slip differential fixed with new friction plates, geared down final drive to increase acceleration, speedometer re-adjusted, suspensions and whole exhaust assembly replaced, performance exhaust manifolds, air filter and throttle body installed, smaller pulleys installed to minimize power loss and increase performance ...