Under the skin: How Chevy's new crate V8 is bigger and bolder
Chevy’s advert headline would be boastful if it wasn’t true to the point of understatement. Its new ZZ632/1000 engine is a big-block V8, which literally means it has a big cylinder block. It’s a term coined in the 1950s and generally implies more power but traditionally more weight and bulk as well. Chevy started the trend but was soon followed byThere’s nothing subtle about this new Chevy V8, and the figures make for staggering reading.
Unusually for a big-block engine, all eight inlet ports are of the same length, volume and layout, and the exhaust ports are all identical too, the symmetry ensuring that each cylinder produces the same power. There are no overhead cams; the valves are operated by pushrods and rocker arms from a single camshaft in the block.
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