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The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi ...
Parts are cast at Bedford Casting Operations in Indiana. [2] Assembly is at Spring Hill Manufacturing, Tennessee, USA. [3] The L3B is the successor to the 3.6L V6 LGX, 3.6L V6 LGZ, and 4.3L V6 LV3 engines. [3] For 2025 the L3B is used in the redesigned Buick Enclave. [4]
The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines that was developed and have been produced by the Chevrolet Division of General Motors from the late 1950s until present. They have powered countless General Motors products, not just Chevrolets, and have been ...
The top-oiler block sent oil to the top center first, the side-oiler block sent oil along a passage located on the lower side of the block first. All FE and FT engines have a bore spacing of 4.630 in (117.6 mm), and a deck height (distance from crank center to top of block) of 10.170 in (258.3 mm).
The big-block engines initially used a forged crankshaft with a stroke of 3.975" for the 1965-1967 425 and 400 CID versions; starting in 1968, both the 400 cu in (6.6 L) and the 455 cu in (7.5 L) big blocks used a stroke of 4.25 in (108 mm), with crankshaft material changed to cast iron except in a few rare cases.
The Gen-2 is closer to the physical size of U.S.-made small-block V8s except for the bore centers, which are the same as some big-block engines. The only parts shared between the 1966-67 Rambler V8 and 1966-91 AMV8 are the lower cam timing sprocket and the timing chain.
With an identical bore and stroke of 4 + 1 ⁄ 16 in (103.2 mm) and 3 + 3 ⁄ 4 in (95.3 mm) it was precisely half the displacement of the 389 and shared numerous parts with the V8, [4] yet weighed considerably more than half as the engine lower half and block casting were not simply divided down the middle.
Cylinder block material: Cast iron: Cylinder head material: Cast iron: Valvetrain: Cam-in-block 2 (B-Series) or 4 (ISB, QSB) valves/cylinder: Compression ratio: 17.2:1, 17.3:1, 17.5:1, 19:1: Combustion; Turbocharger: Holset Engineering (variable) Fuel system: Common rail high pressure direct injection, symmetrical combustion chamber with 7-hole ...