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The general may be investing in a more environmentally friendly future. It announced that it will switch its entire fleet to electric by 2035, but thankfully, for our reducers, today is not that day.

Chevrolet Performance today launched a new ZZ632/1000 crate engine-the largest and most powerful crate engine in the brand's history. The naturally aspirated 632 cubic inch V-8 engine produces 1,004 horsepower and 876 pound-feet of torque, designed for off-road racing.

"This is the biggest and worst crate engine we have ever built," said Russ O'Blenes, Director of General Motors' Performance and Racing Propulsion Team. "As the king of performance, the ZZ632 is at the top of our unparalleled crate engine lineup. It provides incredible power, and it is achieved by pumping air."

The bulk V-8 reached peak power at 6,600 rpm and the speed reached the recommended maximum of 7,000 rpm. Fuel is provided by eight-port injectors, and the engine breathes through CNC-machined high-flow aluminum cylinder heads and symmetrical ports. Traditionally, the shape of the intake port designed for large cylinders varies from cylinder to cylinder, and all eight intake ports of ZZ632 have the same length, volume and layout. Similarly, all exhaust ports of ZZ632 are the same, and this symmetry ensures that each cylinder produces similar power.

As the king of performance, the ZZ632 is at the top of our unparalleled crate engine lineup. It provides incredible power, and it is achieved by pumping air. – Russ O'Blenes, General Manager

The RS-X symmetrical port cylinder head is named after the powertrain engineer Ron Sperry, who designed it as one of his last achievements in 50 years of GM performance and racing engines. Sperry also introduced symmetrical ports to Chevrolet's iconic small V-8 engine, which was equipped with the third-generation LS1 engine that debuted in the 1997 Chevrolet Corvette.

The iron block of ZZ632 shares a mold with Chevrolet Performance's ZZ572 crate engine, but the casting is processed to fit the huge displacement of 632 cubic inches. Compared with the 572 cubic inch V-8 engine, the bore is increased by 0.040 inches, and most of the displacement gain comes from the 0.375 inch long stroke. To provide clearance for long strokes, engineers modified the slider and connecting rod. The four-bolt main cap and forged rotating components ensure strength and durability.

During the development process, an engine withstood more than 200 simulated drag belt tests on a dynamometer.

In September, Chevrolet quietly discontinued its 6.2-liter, 755-horsepower LT5 crate engine, paving the way for this new behemoth. The ZZ632 confronts Mopar's 1,000-horsepower, 7.0-liter "Hellephant" HEMI crate engine.

The ZZ632/1000 crate engine will be exhibited at the 2021 SEMA show in Las Vegas from November 2 to 5. Chevrolet Performance dealers will begin deliveries in early 2022.

Displacement: 632 cubic inches (10,348 cubic centimeters) Bore x Stroke: 4.60 x 4.75 inches Compression ratio: 12.0:1 Power: 1,004 hp @ 6600 rpm Torque: 876 lb-ft @ 5600 rpm, maximum recommended engine speed 0 Deck 7 632 Bowtie Sportsman, cast iron, four-bolt main head cylinder head: RS-X symmetrical ports, CNC machined aluminum crankshaft: forged steel connecting rod: forged steel piston: forged aluminum fuel: electronic port injection

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