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ZZ572 Crate Engine 720R Deluxe Race Engine 19201334
Description
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ZZ572/720R …AND THE R STANDS FOR RACE!
Engineered by GM Performance Parts and GM Racingexclusively for sportsman racers, the new ZZ572/720R isbuilt around an all-new Gen VI tall deck Bow Tie cylinderblock. This all new race block is filled with a forged 4340 steelcrank with 4.375 inch stroke, shot peened forged 4340 Hbeamrods, and forged aluminum pistons with full floatingwrist pins. Plasma moly piston rings are standard is thescreened and louvered windage tray. GM’s first purpose builtdrag race engine is filled with hard core race parts for hardcore performance and long term durability.
The redesigned rectangular port aluminum cylinder headsresult in a race gas only 12 to 1 compression ratio. A solidroller cam with 0.714 inch lift actuates the stainless steelvalves. And, of course, hardened chromemoly retainers, rollerrocker arms, and dual valve springs are used to complete thevalve train.
A new GM tall deck single plane intake manifold and 1095CFM King Demon carburetor deliver enough air and fuel tomake the 720 horsepower at 6250 RPM and 685 ft.lbs. oftorque at 4500 RPM. Ignition is handled by a multiple sparkdischarge ignition. And an SFI approved torsional damper isinstalled at the factory. Out of the crate and into your race car– it’s just that simple.
Race gas fueled, high revving horsepower, all from GM, theZZ572/720R is the engine that will get you down the trackconsistently, pass after pass, season after season.
Available in both short block, long block and deluxe engine configurations. Equipped oil pan may not clear Chevelle and Camaro applications. 
ZZ 572/720R 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 DeckBowtie Gen VI10.200" deck height
Bore ............................. 4.560"
Stroke ........................... 4.375"
Crankshaft ...................... Forged 4340 steel
Connecting Rods ............... Forged 4340 steelH-beam styleShot peened
Pistons .......................... Forged aluminumFull floating wrist pin
Piston Rings .................... Plasma-moly rings
Camshaft ........................ Mechanical rollerValve lift: .714" l, .714" EDuration @ .050" 266°I, .274° E
Lifters ........................... Mechanical roller tappet
Cylinder Heads ................. Aluminum rectangular port118cc combustion chamber
Intake Valves ................... 2.25" Stainless steel
Exhaust Valves .................. 1.88" Stainless steel
Valve Springs ................... Dual valve springs1.567" coil diameter2.050" installed height230 Lbs. seat pressure
Spring Retainers ................ Hardened chromemoly steel
Rocker Arms .................... Aluminum roller rockers 1.7:1 ratio
Push Rods ...................... High performance one piece
Intake Manifold ................. Aluminum tall deck single plane4500 series carburetor
Carburetor ...................... 1095cfm, mechanical secondary
Rear Main Seal ................. New! One piece design
Windage Tray ................... New! Screened and louvered
Damper ......................... High RPM torsional damper
Distributor ....................... Multiple spark discharge
Ignition Timing .................. 36° total advance
Spark Plugs ..................... R42XLS
Fuel ............................. Race fuel
Technical Note:
Paint Code: 49-24550
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Products Accessories for ZZ572 Crate Engine 720R Deluxe Race Engine 19201334
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