• Chevrolet Performance announces new 10 liter ZZ632 Crate Engine that produces 1004 horsepower

Here’s everything you need to know about Chevy’s new Crate engine

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Chevrolet Performance has unveiled a new big-block ZZ632 V-8 crate engine with 632-cubic-inch or 10 liters of displacement, of that, produces, wait for it, a little more than 1,000 horsepower and a monstrous 876 pound-feet of torque.


Chevrolet Performance announces new 10 liter ZZ632 Crate Engine that produces 1004 horsepower
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Chevy has had a stranglehold on the crate engine industry for the longest time, however, it hasn’t really been in the news for a while. That changes now as the bow-tie brand is back. Over the past two years or so, the internet has been frenzied with stories of 1,000 horsepower Ford Performance’ 7.3L Godzilla V-8 and 1,000 horsepower Mopar Hellephant swaps.

With the debut of this new 1004 horsepower, 10.4 liter ZZ632 crate engine, Chevrolet Performance reminds us as to why exactly do they dominate the crate engine market. The new ZZ632 does not use forced induction, a turbo, or a supercharger, instead, the engine solely depends on the colossal displacement alone to deliver the big numbers.

So What’s New on the ZZ632?

The ZZ632 features a cast-iron block construction along with four-bolt main caps, a forged steel crankshaft, connecting rods, and forged aluminum pistons, with a 12.0:1 compression ratio. What’s noteworthy here is that the iron block is based on the same mold as the ZZ572 crate engine, with the castings now machined to a whopping 632-cubic-inch displacement.

The bore has also increased by 0.040 inches when compared to the 572-cubic-inch ZZ572 V-8, with the majority of the displacement gain coming from the longer 0.375-inch stroke. In order to accommodate the extra-long stroke, the block, and connecting rods, both had to be redesigned from the ground up.

This Big Block V-8 produces peak power at 6,600 rpm and can be revved to as high as 7,000 rpm. Among the highlights are the ZZ632’s fuelling system, which consists of Eight port injectors and CNC-machined high-flow aluminum heads. The heads have symmetrical intake and exhaust ports, guaranteeing that all cylinders produce the same amount of power.

“The ZZ632 sits at the top of our unparalleled crate engine lineup as the king of performance,” said director of the Performance and Racing Propulsion Team, Russ O’Blenes. “It delivers incredible power, and it does it on pump gas.”

These RS-X Symmetrical Port cylinder heads are named after powertrain engineer, Ron Sperry, who has developed them as one of his final triumphs after working on GM performance and racing engines for over half a century. Sperry also added symmetrical ports to Chevy’s classic Small Block V-8 engine, which was introduced on the ’97 Vette.

ZZ632 Crate Engine Price

There’s no word on pricing yet, although the 621 horsepower ZZ572/620 with which it shares an engine block mold costs $16,304.82. The ZZ632 will be sold through Chevy’s Performance dealer network, beginning early next year. It will be on display at this year’s SEMA Show in Vegas, scheduled between November 2nd through 5th.

To Sum it Up

Well, with the launch of the ZZ632, I guess Chevy is sticking with the old saying ‘There’s no replacement for displacement’. Oh and I completely forgot to mention the best part about this new engine. It can produce all this power while running on good old 93-octane fuel from your local gas station.

Now that’s saying something, isn’t it? I wonder what kind of performance will hot-rodders and tuners alike be able to extract from this new big-block V-8. Only time will tell, but exciting times await for the ZZ632 and we can’t wait to see it hit the drag strip soon. Expect it to be reliable as Chevy ran the ZZ632 through 200 simulated test cycles and the engine didn’t break a sweat.

Chevrolet Performance ZZ632/1000 specifications
Displacement 632 cu in (10,348 cc)
Bore x Stroke 4.60 x 4.75 in
Compression Ratio 12.0:1
Power 1,004 hp @ 6600 rpm
Torque 876 lb-ft @ 5600 rpm
Maximum Recommended Engine Speed 7,000 rpm
Block Tall Deck 632 Bowtie Sportsman, cast iron, four-bolt main caps
Cylinder Heads RS-X Symmetrical Port, CNC-machined aluminum
Crankshaft Forged steel
Connecting Rods Forged steel
Pistons Forged aluminum
Fuel Electronic port injection
Khris Bharath
Khris Bharath
Khris is a classic car aficionado and adores his Jags and Alfas, although he keeps tabs on everything from super exotics like an old EB 110 to the latest from Lucid. Formula One is very close to his heart, and he diligently makes time to tune in for the Grand Prix on Sundays. Khris also loves his road trips and he prefers stick shift over an Auto any day.  Read full bio
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Chevrolet Performance today introduced the ZZ632/1000* crate engine — the largest and most powerful crate engine in the brand’s history. The naturally aspirated 632-cubic-inch V-8 produces 1,004 horsepower and 876 lb-ft of torque.

“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 sits at the top of our unparalleled crate engine lineup as the king of performance. It delivers incredible power, and it does it on pump gas.”

The Big Block V-8 reaches peak power at 6,600 rpm and revs to a recommended maximum of 7,000 rpm. Fuel is delivered by eight port injectors with the engine breathing through CNC-machined high-flow aluminum cylinder heads featuring symmetrical ports. While Big Blocks have traditionally been designed with variations in port shape from cylinder to cylinder, all eight intake ports of the ZZ632 have the same length, volume and layout. Similarly, all of the ZZ632’s exhaust ports are identical. This symmetry ensures individual cylinders all produce similar power.

These RS-X Symmetrical Port cylinder heads are named for powertrain engineer Ron Sperry, who designed them as one of his final accomplishments in more than 50 years working on General Motors performance and racing engines. Sperry also introduced symmetrical ports to Chevy’s iconic Small Block V-8 with the Gen III LS1 engine that debuted in the 1997 Chevrolet Corvette.

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. Chevrolet Performance dealers will begin deliveries in early 2022.

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