“Big Chevy Engine!!!” said the press release in so many words. That’s odd, I thought; Chevy’s kind of a buttoned-down company, what on Earth could make them crow like this" Then I read the figures. After I regained consciousness (I think I struck my head on the edge of the desk before hitting the floor), all I could mutter was, “Big Chevy Engine!!!”

Chevrolet Performance ZZ632 Crate Engine

There are two big numbers here. The first is 632. That’s the displacement of this new monster V8 plant from The Bowtie Boys: 632 cubic inches. That’s over 10-liters. That’s big. But that’s not the really big number. The really big number is 1,004. That’s the horsepower output. Over a thousand! Add to that the 876 lb-ft. of torque, making the naturally aspirated ZZ632/1000 the largest and most powerful crate engine in Chevy’s history. 
?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.?

Pump Gas

Pump gas, I thought" What’ll it do on race gas" What’ll this thing do on AV gas" And then my mind really started racing. How strong is the bottom end" How much compression can it take" How big of a blower can it take"...