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GM Performance Parts ZZ572/720r |
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Engineered by GM Performance Parts and GM Racing
exclusively for sportsman racers, the new 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 crank with 4.375 inch stroke, shot
peened forged 4340 Hbeam 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 redesigned rectangular port aluminum cylinder heads
result in a race gas only 12 to 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 valve train.
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 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. Out of the crate and
into your race car – it’s 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.
Available in both short block, long block and deluxe
engine configurations. Equipped oil pan may not clear
Chevelle and Camaro applications. |
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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
Deck Bowtie 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" l, .714" E Duration @ .050" 266°I,
.274° E
Lifters ........................... Mechanical roller
tappet
Cylinder Heads ................. Aluminum rectangular
port 118cc combustion chamber
Intake Valves ................... 2.25" Stainless steel
Exhaust Valves .................. 1.88" Stainless steel
Valve Springs ................... Dual valve springs
1.567" coil diameter 2.050" installed height 230 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 plane 4500 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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Click
here for the ZZ572/720r GM Performance Parts
Website. |
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