GM Performance Parts ZZ572 Crate Engines
Tilbake     Hovedside

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The ZZ572/620 is built around an all-new Gen IV tall deck Bow Tie cylinder block. This race block is filled with a forged 4340 steel crankshaft with 4.375'' stroke, shot peened forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins. Plasma-moly rings are standard as is the screened and louvered windage tray. Hard core parts for hard core long term durability.

The redesigned rectangular port aluminum cylinder heads result in a pump gas friendly 9.6:1 compression ratio. A hydraulic roller cam with 0.632'' lift actuates the stainless steel valves. And ,of course, hardened chromemoly retainers, roller rocker arms, and dual valve springs are used to complete the valvetrain.

A GM tall deck single plane intake manifold and 850 CFM Demon carburetor deliver enough air and fuel to make the 620 HP at 5500 RPM and 650 ft/lb or torque at 4500 RPM. Ignition is handled by a GM HEI distributor. This impressive big-block engine is pump gas friendly, with massive horsepower and torque all from GM, the ZZ572 is for those who consider excess to be barely enough and suitable for street/strip applications. Finally released by GM but gone is the bright red paint and Chevy Bow Tie logo on the valve covers. Now it comes in the traditional Chevy orange paint and 572ci on the valve covers!


GM ZZ572/620 HP Crate Engine

  123.300 + Mva

GM ZZ572/720 HP Crate Engine 

  132.400 + Mva