- Engines & Components
- Engine - Assembled / Ready-to-Run
- Chevrolet Performance ZZ572/620 Base 572ci/621HP Crate Engine
Perfect Foundation For A Pump-Gas Boulevard Shaker!
Proving the adage there's no replacement for displacement, the ZZ572/620 is the ultimate expression of Chevrolet Performance's engineering capability, wrapped up in a soul-stirring combination of performance and attitude. They build the ZZ572/620 with huge 4.560-inch bores and a 4.375-inch stroke to help it deliver 621-horsepower and a stunning 645 lb.-ft. of grunt! Strength comes from a latest-generation tall-deck block casting with four-bolt main caps, forged steel crankshaft, forged steel H-beam connecting rods, forged aluminum pistons, while high-flow aluminum rectangular-port cylinder heads with massive 310cc intake passages, 118cc raised exhaust ports and 118cc combustion chambers process tremendous airflow. A hydraulic roller camshaft with incredible 0.632/0.632-inch lift and 254/264-degree duration specifications optimizes the airflow volume enabled by the large-port heads.
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Horsepower ratings were achieved using a single plane intake manifold, 850cfm 4150-style carburetor and HEI distributor.
ZZ572/620 BASE TECH SPECS:
- Engine Type: Chevy Tall Deck Big-Block V-8
- Displacement: 572ci
- Bore x Stroke: 4.560'' x 4.375''
- Block: Cast-iron with four-bolt main caps
- Crankshaft: Forged steel
- Connecting Rods: Forged steel, shot peened
- Pistons: Forged aluminum
- Camshaft Type: Hydraulic roller
- Camshaft Lift: .632'' intake / .632'' exhaust
- Camshaft Duration (@.050 in.): 254° intake / 264° exhaust
- Cylinder Heads: Aluminum rectangular port, 118cc combustion chambers
- Valve Size: 2.250'' intake / 1.880'' exhaust
- Compression Ratio: 9.6:1
- Rocker Arms: Aluminum roller rockers
- Rocker Arm Ratio: 1.7:1
- Flexplate: 14'' diameter
- Recommended Fuel: Premium pump (92 octane)
- Ignition Timing: 36° Total @ 4000 rpm
- Maximum Recommended RPM: 6000
- Balanced: Internal