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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.
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 ...
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.
2014 Ram 1500 Urban Concept – The 2014 Ram 1500 Urban Concept features a 6.4 L (390 cu in) Hemi V8 producing 470 hp (350 kW) and 470 lb⋅ft (637 N⋅m) of torque. The engine comes from the Dodge Challenger SRT8 which is paired with a 5-speed automatic W5A580 transmission or a 6-speed manual Tremec TR6060 transmission.
A camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3 mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310 hp (231 kW) with that cam), but ...
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.
Work Completed: Engine performance problem resolved by replacing one of the VarioRam lifters in the intake manifold, shock absorbers replaced with custom-made coilovers complete with Wheeler Dealers logos on top of the strut mounts, brake backing plates and suspension drop links replaced, faulty rear spoiler mechanism fixed by replacing broken ...
The 100th Anniversary Edition is a version of the 2014 Dodge Charger SXT Plus with the Pentastar V6 engine or R/T Plus with HEMI V-8 engine, commemorating the 100th anniversary of brothers Horace Elgin Dodge and John Francis Dodge introducing the Dodge Model 30, with choice of 8 body colors (Pitch Black, Bright White, Billet Silver, Granite ...