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Chevrolet Performance 12498792 - Chevrolet Performance ZZ572/620 Base 572ci/620HP Engine

Chevrolet Performance 12498792 - Chevrolet Performance ZZ572/620 Base 572ci/620HP Engine
Chevrolet Performance 12498792 - Chevrolet Performance ZZ572/620 Base 572ci/620HP Engine

JEGS Part Number: 809-12498792

ZZ572/620 Base Engine
  • 621 HP @ 5400 RPM
  • 645 ft/lbs TQ @ 4200 RPM

    Chevrolet Performance 12498792 Details

  • Clutch linkage boss is now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads, for clearance
  • Gen VI tall-deck block has machined mechanical fuel pump boss
  • Comes with a 14'' automatic transmission flexplate. Requires internally balanced flywheel for manual transmission applications
  • Designed for pre-1976 street vehicles or any off-road vehicle
  • Not intended for marine applications

  • Chevrolet Performance ZZ572/620 Base 572ci/620HP Engine

    Perfect Foundation For A Pump-Gas Boulevard Shaker!

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    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.

    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: 92 octane
  • Ignition Timing: Base 8° BTDC, 36° Total
  • Maximum Recommended RPM: 6000
  • Balanced: Internal
  • GM Warranty

    Chevrolet Performance 12498792

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