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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 engine had MPFI (multi-port fuel injection), which gave slightly more power and better fuel economy, and two valves per cylinder. The engine had a bore and stroke of 4 + 1 ⁄ 4 in × 4 in (108.0 mm × 101.6 mm), producing 290 hp (216 kW) at 4000 rpm and 410 lb⋅ft (556 N⋅m) at 3200 rpm. It was used by Mercury Marine, named the ...
The naturally aspirated GMC four-stroke diesel engines were added to the General Motors truck line for the 1965 model year. As introduced, the D351, D478, and DH478 all shared the same 17.5:1 compression ratio. [10]: 34 Although they shared similar displacement, bore, and stroke dimensions with the gasoline engines, very few parts were the same.
The engine was sold in different displacements depending on the model of car and the year and was constructed upon two distinct (possibly more) block castings. The engine block in the smaller displacement versions internally resembled the 1937-53 inline Chevrolet 216, 235 & 261" straight six (the combustion chamber design was quite different ...
The 350 cu in (5,735 cc) B engine was, along with the 361, the first production B engine, first available in 1958. It had a bore of 4 + 1 ⁄ 16 in (103 mm; 4.06 in). The 350 is classified as a big-block engine. All parts except for the pistons are fully compatible with the 361. Vehicles using the B 350: 1958 DeSoto Firesweep; 1958 Dodge Coronet
Between 1932 and 1935, Stuart Turner produced the small (1/2 HP) type N engine, which had an overhung crank. This model seems to have been superseded by the type R 2-stroke engine, which was introduced in 1934 with a full width crank. The R2 being 84 cc, and the R3 having a larger bore size and hence 123 cc.