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The Biggest, Baddest Crate Engine Chevy's Ever Built

The Biggest, Baddest Crate Engine Chevy's Ever Built

Chevrolet Performance has just unveiled its largest, most powerful crate engine ever - The ZZ632/1000 - a 632 cubic inch monster V8 delivering 1,004 horsepower and 876 lb-ft of torque.

Chevy crate engine

Image: Chevrolet

"This is the biggest, baddest crate engine we've ever built," said Russ O'Blenes, GM director of the Performance and Racing Propulsion Team.

The ZZ632's iron block shares a mold with Chevrolet Performance's ZZ572 crate engines, but the castings are machined to accommodate the massive 632-cubic-inch displacement. The bore grows by 0.040 inch compared to the 572-cubic-inch V-8s, with most of the displacement gain coming from a stroke that's 0.375 inch longer. To provide clearance for that long stroke, engineers modified both the block and the connecting rods. Four-bolt main caps and a forged rotating assembly ensure strength and durability. During development, a single engine endured more than 200 simulated drag strip passes on a dynamometer.

The ZZ632/1000 crate engine will be on display at the 2021 SEMA Show in Las Vegas, Nov. 2-5. We'll be there, so expect to see some additional pics and info in the next couple of weeks.

Chevrolet Performance dealers will begin deliveries in early 2022.

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