GILBERT CHEVROLET - ZZ572/620, ZZ572/720R Performance Crate Engines
GILBERT CHEVROLET - ZZ572/620 AND ZZ572/720R GMPP CRATE ENGINES
GM’s two new 572 big-block engines, one that will be streetable and one that most likely only be seen at shows or on the track.
Gm markets these engines under the names of ZZ572/620 for the 620 HP 92 octane fuel version and ZZ572/720R for the 720 HP racing fuel version. This page contains GM’s specs for both engines and pictures of both engines.
Keys - scperformanceeng, gmperformanceeng, or gmgoodwrencheng for SC, GM, or Goodwrench engines. Use allengine for a complete list of all three.
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The new ZZ572/620 is built around an all-new Gen VI tall deck Bow Tie cylinder block. This all new 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 inch 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 new GM tall deck single plane intake manifold and 850 CFM Demon carburetor deliver enough air and fuel to make the 620 horsepower
at 5,500 RPM and 650 ft. lbs. of torque at 4,500 RPM. Ignition is handled by a GM HEI distributor.
This impressive big-block engine is pump gas friendly, massive torque and horsepower, all from GM, the ZZ572/620 is for 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. In are traditional Chevy orange
paint and 572 on the valve covers.
88962814 - High RPM torsional damper SFI approved, 8”.
Oil Pan
88963707
Windage Tray
New! Screened and louvered
Oil Pan Gasket
10106407
Oil Pump
88963707
Spark Plug
05613878 - R45XLS
12498827 Premium Engine (Long-Block Components Plus The Following:)
Intake Manifold
88961161 - Aluminum tall deck single plane, 4150 series carburetor.
Carburetor
88961560 - 850 cfm Demon, mechanical secondary
Distributor
88961867 - HEI
Water Pump
14058915 - Aluminum, Short Style
Flex Plate
12561217 - Special 572, Automatic Transmission
Intake Gasket
88962213 - Gasket, Intake Manifold
Spark Plug Wires
12499211 - Wires & Looms, Red
ZZ572/720R DESCRIPTION
The new ZZ572/720R was engineered by GM Performance Parts and GM Racing exclusively for sportsman racers. The ZZ572/720R is built
around an all-new Gen VI tall deck Bow Tie cylinder block. This all new 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.
GM’s first purpose built drag race engine is filled with hard core race parts for hard core performance and long term durability.
The redesigned rectangular port aluminum cylinder heads result in a race gas only 12:1 compression ratio. A solid roller cam
with 0.714 inch 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 new GM tall deck single plane intake manifold and 1095 CFM King Demon carburetor deliver enough air and fuel to make the 720 horsepower
at 6,200 RPM and 685 ft. lbs. of torque at 4,500 RPM. Ignition is handled by multiple spark discharge ignition. An SFI approved torsional damper is installed at the
factory. Out of the crate and into your race car - it’ just that simple.
Race gas fueled, high revving horsepower, all from GM, the ZZ572/720R is the engine that will get you down the track consistently,
pass after pass, season after season.
All we can say is it’s the stupendous! Not only is it a dream big-block engine but the R in ZZ572/720R stands for “Race” and race it will,
that’s for certain.
Finally released by GM but gone is the bright red
paint and Chevy Bow Tie logo on the valve covers. In are traditional Chevy orange
paint and 572 on the valve covers.
12498825 Short-Block
12498826 Base Engine (Long-Block)
12498827 Premium Engine
ZZ572/720R SPECIFICATIONS
572 C.I.D. - 12:1 Compression Crate Engine Technical Information
Horsepower
720 @ 6250 RPM
Torque
685 Ft. Lbs. @ 4500 RPM
Max. Recommended RPM
6750 RPM
Compression Ratio
12:1
Block
New! Sportsman Tall Deck Bow Tie Gen VI, 10.200” Deck Height
Bore
4.560”
Stroke
4.375”
Crankshaft
Forged 4340 steel
Connecting Rods
Forged 4340 steel, H-beam style, Shot peened
Pistons
Forged Aluminum, Full Floating Wrist Pin
Piston Rings
Plasma-moly rings
Camshaft
Mechanical roller (Valve lift: .714” I, .714” E; Duration @ .050” 266° I, 274° E)
