When it comes to big-inch, big-power crate engines, there’s a new sheriff in town, and his badge is bowtie shaped. Yep, Chevrolet Performance just announced a 632-cubic-inch (that’s over 10 liters for the metric crowd) big-block monster that belts out a tick over 1,000 hp and a whopping 876 lb-ft of twist. But as the guy said in the infomercial, “But wait, there’s more.” You see, this is a street engine, and it makes this power on pump gas and without any power adders.
“This is the biggest, baddest crate engine we’ve ever built,” said Russ O’Blenes, 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.”
While the ZZ632 makes peak power at 6,600 rpm, it easily revs out to a recommended maximum of 7,000 rpm. Fuel is delivered by eight port injectors with the big-block breathing through high-flow CNC-machined aluminum cylinder heads that feature symmetrical ports. Traditionally, big-blocks have been designed with variations in port shape from cylinder to cylinder. But in this case, all eight of the ZZ632’s intake ports 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.
For the full story, check out this article from Motor Trend.