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The big bore allowed for larger, 2.08 in (53 mm), intake valves, and the relatively short stroke helped it to be a free-revving and free-breathing engine. Producing a maximum of 330 hp (246 kW; 335 PS) ( gross ) and 460 lb⋅ft (624 N⋅m) of torque for the 1960 model year, the 383 beat the 392 Hemi that had reached 435 lb⋅ft (590 N⋅m).
The following year saw the introduction of the RB Block in Chryslers and Imperials; this was a modified B Block with a raised deck resulting in an increase of stroke from 3.18 inches to 3.75 inches. In 1960 and 1961, Chrysler began offering RB-engine vehicles with its new "cross ram" induction system that had been developed by the Ramchargers ...
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.
Both had a bore of 3.875 in (98.4 mm), but the stroke decreased slightly from 3.4375 in (87.31 mm) on the earlier engine to 3.414 in (86.7 mm) on 1996 and later engines. The small stroke change of 0.03 in (0.76 mm) was accomplished by moving the piston pin and changing the crankshaft stroke; the rod length did not change.
The 3.5 L; 214.7 cu in (3,518 cc) engine was a version of the 3.3 with a larger bore of 96 mm (3.78 in) and featured overhead cams. The 3.5L version has an intake arrangement with two separate manifolds and throttle bodies connected with a crossover valve. This provides better low and midrange torque.
An engine is described as oversquare or short-stroke if its cylinders have a greater bore diameter than its stroke length, giving a bore/stroke ratio greater than 1:1. An oversquare engine allows for more and larger valves in the head of the cylinder, higher possible rpm by lowering maximum piston speed, and lower crank stress due to the lower ...
The gross power and torque outputs decreased to 72 hp (54 kW; 73 PS) and 112 lb⋅ft (152 N⋅m), respectively, when the engine had a 6.9:1 compression ratio. Bore and stroke dimensions were the same as the L-head engine at 3 + 1 ⁄ 8 x 4 + 3 ⁄ 8 inches, giving 134.2 cu in (2,199 cc). [3] The F4-134 was introduced in 1950 in the Jeep Truck. [4]
Wave Dynamic considerations: Although four-strokes have this problem, two-strokes rely much more heavily on wave action in the intake and exhaust systems. The two-stroke port design has strong effects on the wave timing and strength. Heat flow: The flow of heat in the engine is heavily dependent on the porting layout.