ZZ572/620 Deluxe Crate Engine
650 lb.-ft. @ 4,500 rpm 620 hp @ 5,500 rpm
The ZZ572/620 is the ultimate expression of GM Performance Parts’ engineering capability.
We build the ZZ572 with huge 4.560-inch bores and add a forged 4.375-inch-stroke crankshaft. To make sure those cylinders are packed with every cubic centimeter’s worth of atmosphere, we use a camshaft with incredible 0.632/0.632-inch lift and 254°/264° duration specifications.
Aluminum rectangular-port heads with 310cc intake passages complement the airflow capability offered by the big-bore bottom end. They also feature 118cc raised exhaust ports and 118cc combustion chambers. The valves are big, too – measuring 2.250 inches on the intake side and 1.880 inches on the exhausts.
GM Performance Parts delivers the ZZ572/620 Deluxe with an 850-cfm carburetor, HEI distributor, aluminum water pump and distinctive orange powder-coated valve covers that proudly proclaim the 572 legend.
For the builder who wants the foundation of this Big-Block powerhouse, but wants to fi nish it with the induction system of his choice, we offer the ZZ572/620 Base engine P/N12498792. It comes with the bottom end fully assembled – including the forged crankshaft, rods and pistons – along with the unique 0.632-inch-lift roller camshaft.
ZZ572/620 Deluxe Crate Engine Installation Notes
Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installed
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
Requires addition of starter and fuel pump (not included)
Gen VI tall-deck block has machines mechanical fuel pump boss
Comes with a 14" automatic transmission flexplate. Requires internally balanced flywheel for manual transmissions applications
Designed for pre-1976 street vehicles or any off road vehicle
Not intended for marine applications
You do have a strong transmission and rear axle, don't you?
ZZ572/620 Deluxe Crate Engine Tech Specs
Engine type: Chevy Tall Deck Big-Block V-8
Displacement (cu in): 572
Bore x stroke (in): 4.560 x 4.375
Block (p/n 19212195): Cast-iron with 4-bolt main caps
Crankshaft (p/n 88961554): Forged steel
Connecting rods (p/n 88962926): Forged steel, shot peened
Pistons (p/n 88962925): Forged aluminum
Camshaft type (p/n 88961557): Hydraulic roller
Camshaft lift (in): .632 intake / .632 exhaust
Camshaft Duration (@.050 in): 254° intake / 264° exhaust
Cylinder Heads (p/n 12499255): Aluminum rectangular port, 118cc chambers
Valve size (in): 2.250 intake / 1.88 exhaust; stainless steel
Compression ratio: 9.6:1
Rocker arms (p/n 12361323): Aluminum roller style
Rocker arm ratio: 1.7:1
Distributor (p/n 88961867): HEI
Carburetor (p/n 19170095): 850-cfm
Water pump (p/n 19168602): Aluminum, short-style
Spark plugs and wires: Included
Flexplate (p/n 12561217): 14"
Recommended fuel: 92 octane
Ignition timing: Base 8° BTDC, 36° Total
Maximum recommended rpm: 6,000