Top Definition
A small block is an engine block with usually less than 6 litres of displacement. Although there have been exceptions where the displacement has been more than 6 litres and one of them is the ever famous 427 or 7.0 litre engine.
A small block is an engine block. Pretty simple, an engine block is a machined part that holds the pistons and other parts into place. It is basically the frame of the engine. Displacement describes the total air/fuel mixture an engine can draw in during one complete engine cycle.
by Jeff Kingyens October 20, 2006

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A V8 engine from a family used in Chevrolet and some other GM cars from about 1955 forward.
The smallblock in his Camaro was getting tired so he decided to hotrod it when he rebuilt it.
by Pufnblu4u January 26, 2005

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