GM Performance Parts Largest Displacement,Most Powerful Crate Engine Ever!

HORSEPOWER-620 at 5500

TORQUE-650 FT. Lbs at 4500

Maximum Recommended RPM- 6000

Compression Ratio- 9.6:1-Designed to run on 92 octane Pump gas

The all new ZZ572/620 is built around an all new Gen VI tall deck Bow Tie block.And is filled with the highest quality, most durable parts that GM has to offer! This is a serious big block,for a person looking for serious street/strip horsespower.Each 572 is assembled by hand and is built from the following list of parts-

Block-part # 25534368 - Sportsman , 10.200" Deck height, one piece rear main seal,Mechanical fuel pump provisions,fully CNC machined block ,This block is powder coated Chevy orange,Honed cam and crankshaft bores,nodular iron 4 bolt main caps with grade 8 bolts splayed 16°,machined for production type Gen VI roller camshaft.

Crankshaft-part # 88961554 Forged 4340 Steel, Internally balanced, crossdrilled and nitrided 4.375" stroke. This Crankshaft is manufactured by Callies® For G.M.

Connecting Rods-part # 88962926 Premium 4340 forged steel "H" beam with 7/16" rod bolts These Rods are manufactured by Eagle® for G.M.

Pistons- part # 88962925 Forged Aluminum. These pistons are manufactured by J.E.® for G.M.

Camshaft- part # 88961557 Hydraulic  Roller

Cam specs.-

Intake Lift- .632"             Intake Duration @ .050"-254°

Exhaust Lift-.632"            Exhaust Duration @ .050"-264°

Lobe Centerline-112°

This Camshaft does have a mechanical fuel pump lobe , and must be used with part# 10456413 Melonized distributor gear.

Cylinder Head- part # 12499255 Special 572 cylinder head,Aluminum Rectangular port,118cc combustion chamber,with 2.25" intake valves, 1.88" exhaust valves, 315cc intake runner volume.These heads have two extra head bolt holes (in the lifter valley) and use special springs specifically for the 572's camshaft.

Rocker Arms-part # 12361323 1.7:1 ratio, full roller.

Harmonic Balancer-part # 88962814 Neutral balance, S.F.I. approved 8"

Intake Manifold- part # 88961161 Single plane Bowtie , special tall deck version with integrated end rails and modified distributo mounting boss so that standard chevy V8 distributors can be run. Use with intake gasket part 3 88962213.

Carburator- Part # 88961560 Barry Grant Demon 850 c.f.m. mechanical secondary.Jetting and specs. are in notes section below. 

Distributor- part # 88961867 GM HEI, with coil in cap.

Additional parts included with this engine:

Cast Aluminum Valve Covers, Powder Coated Chevy Orange with raised "572 Chevrolet" script

Chrome push in breather

14" Automatic Flexplate 

6 quart oil pan with screened and louvered windage tray

Oil filter adapter and oil filter

Oil dipstick and tube

This version or the 572 does not include:

Fuel Pump, Starter,  Any front mounted accesories other than those mentioned

Notes:

This engine does have a mechanical fuel pump provision on the block, and it does have a fuel pump lobe on the camshaft.

This engine block has provisions for mechanical clutch "Z" bar linkage in both locations including the 65'-76' Big Block Corvette location.

850 CFM Mechanical Secondary carburator is reccomended.The BG Demon carb used on this engine has 85 primary jets,93 secondary jets,6.5 power valve,45 squirters primary, and 30cc accelerator pumps

This engine uses a Gen VII internally balanced Flexplate part # 12561217 & 6 bolts part # 3727207. If a manual transmission flywheel is needed, part # 12555135  & 6-839756 flywheel bolts must be used,Remember that unlike the 454 and 502 engines, this engine is internally balanced. Using the wrong flywheel/flexplate can destroy the engine due to a severe out of balance situation.

This engine comes with a large 6 quart oil pan with a large sump that will most likely not fit most chassis.The oil pan is 9 1/2" deep, and the length of the bottom of the sump portion is 12". If a different oil pan is needed to clear you particular chassis, please call Pace Performance, so that we can reccomend a specific pan.

Due to the single plane intake used on this engine, it is a relatively tall package in overall height.Measurement form the end rails of the block to the top of the carburator ( where the air cleaner sits is 9 1/2")

A tall deck rectangular port intake manifold, or a standard deck rectangular port intake manifold with end rail spacers and a slip collar distributor must be used with this engine.The Gm intake manifold part # 88961161 is a special tall deck intake that has integrated end rail spacers, and the distributor mounting pad is modified so that a standard chevy distributor fits.

Due to the tall valve covers on this engine, there may not be sufficient clearence for power brake boosters. The measurment from the bellhousing flange of the block to the tallest point of the valve covers is 10"

Any big block water pump can be used on this engine without problems.

ZZ 572 720BHP Race Engine 12498827 Deluxe Package $14,600 MSRP - $18,300.00 _______________________ 12498826- 572R Long Block (720 HP Verison) Does Not Include Intake, Carburator,Water Pump, Distributor or spark Plug Wires  $13,050 MSRP - $16,460.00 GM’s most powerful Street engine ever produced will make your Street Rod or Muscle Car the envy of the neighborhood. The ZZ572/720Ris built around an all-new Gen VI tall deck race block, filled with a forged, 4340 steel, 4.375” stroke crankshaft, shot-peened forged 4340 H-Beam rods, and forged aluminum pistons with full floating wrist pins. Plasma moly piston rings are standard 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 newly redesigned rectangular port aluminum cylinder heads result in a race gas only 12:1 compression ratio. A solid roller cam with .714” lift actuates the stainless steel valves. And, of course, hardened chromemoly retainers, roller rocker arms, and dual valve springs are used to complete the valve train. The new GM tall deck single-plane intake manifold and a 1095cfm King Demon carburetor deliver enough air an dfuel to make 720 horsepower at 6250 RPM and 685 ft.lbs. of torque at 4500 RPM. Ignition is handled by a multiple spark discharge ignition. And an SFI approved torsional damper is installed at the factory.  ZZ572 / 720R Technical Information ·HP: 720 @ 6250 RPM ·Torque: 685 Ft. Lbs. @ 4500 RPM ·Compression Ratio: 12:1 ·Bore: 4.560” ·Stroke: 4.375” ·Block: Bowtie Tall Deck with One-piece rear seal ·Crankshaft: Forged 4340 Steel ·Connecting Rods: Forged 4340 Steel, H-Beam style, Shot peened ·Pistons: Forged aluminum with full floating wrist pin ·Piston Rings: Plasma-moly rings ·Camshaft: Mechanical roller (.714” / .714” lift) (266 / 274 duration @ .050”) ·Lifters: Mechanical Roller tappet ·Cylinder Heads: Aluminum Rectangular Port with a 118cc combustion chamber ·Intake Valves: 2.25” Stainless Steel ·Exhaust Valves: 1.88” Stainless Steel ·Valve Springs: Dual spring (1.567” diameter) ·Spring Retainers: Hardened chromemoly steel ·Rocker Arms: Aluminum Roller Rockers, 1.7:1 ratio ·Push Rods: High Performance (1-piece) ·Windage Tray: All new Screened and Louvered design ·Timing: 36 degrees total advance ·Spark Plugs: R42XLS ·Fuel: Race Fuel.

GM Performance Parts Largest Displacement,Most Powerful Crate Engine Ever!

572/720 RACE Version

HORSEPOWER-720 at 6250

TORQUE-685 FT. Lbs at 4500

Maximum Recommended RPM- 6750

Compression Ratio- 12.1:1-Designed to run on 110 octane Race Fuel

The all new ZZ572/720 is built around an all new Gen VI tall deck Bow Tie block.And is filled with the highest quality, most durable parts that GM has to offer! This is a serious big block,for a person looking for serious street/strip horsespower.Each 572 is assembled by hand and is built from the following list of parts-

Cam specs.-

Intake Lift- .714"             Intake Duration @ .050"-266°

Exhaust Lift-.714"            Exhaust Duration @ .050"-274°

Lobe Centerline-112°

This Camshaft does have a mechanical fuel pump lobe , and must be used with part# 10456413 Melonized distributor gear.

Cast Aluminum Valve Covers, Powder Coated Chevy Orange with raised "572 Chevrolet" script

Chrome push in breather

14" Automatic Flexplate 

6 quart oil pan with screened and louvered windage tray

Oil filter adapter and oil filter

Oil dipstick and tube

This version or the 572 does not include:

Fuel Pump, Starter, Any front mounted accesories other than those mentioned

Notes:

This engine does have a mechanical fuel pump provision on the block, and it does have a fuel pump lobe on the camshaft.

This engine block has provisions for mechanical clutch "Z" bar linkage in both locations including the 65'-76' Big Block Corvette location.

1090 CFM Mechanical Secondary carburator is reccomended.The BG Demon carb used on this engine has 96 primary jets,96 secondary jets,42 squirters primary, and 50cc accelerator pumps

This engine uses a Gen VII internally balanced Flexplate part # 12561217 & 6 bolts part # 3727207. If a manual transmission flywheel is needed, part # 12555135  & 6-839756 flywheel bolts must be used,Remember that unlike the 454 and 502 engines, this engine is internally balanced. Using the wrong flywheel/flexplate can destroy the engine due to a severe out of balance situation.

This engine comes with a large 6 quart oil pan with a large sump that will most likely not fit most chassis.The oil pan is 9 1/2" deep, and the length of the bottom of the sump portion is 12". If a different oil pan is needed to clear you particular chassis, please call Pace Performance, so that we can reccomend a specific pan.

Due to the single plane intake used on this engine, it is a relatively tall package in overall height.Measurement form the end rails of the block to the top of the carburator ( where the air cleaner sits is 9 1/2")

A tall deck rectangular port intake manifold, or a standard deck rectangular port intake manifold with end rail spacers and a slip collar distributor must be used with this engine.The Gm intake manifold part # 88961161 is a special tall deck intake that has integrated end rail spacers, and the distributor mounting pad is modified so that a standard chevy distributor fits.

Due to the tall valve covers on this engine, there may not be sufficient clearence for power brake boosters. The measurment from the bellhousing flange of the block to the tallest point of the valve covers is 10"

Any big block water pump can be used on this engine without problems.