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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.
Long block - a short block, with mounted and gasketed cylinder head, valves and camshaft Crate engine - a new or remanufactured engine, considered to be equivalent to a new engine. [ 3 ] Parts include more than a long block, including intake manifold, and carburetor or fuel injection system, oil pan, valve covers, and perhaps an alternator
The 2008 4.7 also features other upgrades including a more aggressive camshaft profile, a 74 mm (2.91 in) throttle body, and an improved intake manifold with shorter runners. See Allpar's page on the latest 4.7 L.
In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines. The Hemi-6 valves are angled apart (splayed) 18 degrees (included angle) along the crankshaft axis, and the intake valves are as large as 1.96 in (50 mm). The 6 intake and 6 exhaust valves open slightly towards each other ...
The standard Hemi V8 produces 410 horsepower (306 kW) and 429 pound force-feet (582 N⋅m) of torque. For Chassis Cab models, the engine is downrated to 370 hp (276 kW) but retains the same torque. The engine is equipped with Variable Cam Timing (VCT) and a Multi-Displacement System (MDS) which shuts down four of the engine's eight cylinders ...
The car also had unique engine management software that removed the stock R/T speed limiter. The 2009 features the new Variable Camshaft Timing HEMI, producing 368 hp (274 kW). These are the First Daytona's to wear a badge listing the number it was produced out of total production numbers
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