Infos Moteur 290 AMC

Cylinder Block
The block was a slim-wall design using fine-grain cast iron. The casting process required only four cores: A body core and two water jacket cores of the hot-box type, as well as an oil-sand rear core. Eleven oil-sand cores were required for the old engine. The use of only four cores represented a major advancement in the manufacturing of cylinder blocks.
Displacements of the 290 and 343 cubic inch engines were provided by bore diameters of 3.75 inches and 4.08 inches, respectively, using a common stroke of 3.28 inches. Cylinder bore spacing was 4.75 inches, which provided room for large valves and ports for excellent volumetric efficiency while maintaining relatively close bulkhead spacing for good crankshaft support from the five main bearings.