For Release: Oct. 28, 2003, 8 a.m. ET

GM PERFORMANCE PARTS BRINGS POWER TO SPARE WITH NEW ENGINES

People who live for acceleration and top speed know one thing – life gets better the faster you go. Well, the team at GM Performance Parts understands this and is making higher performance possible with a selection of new crate engines.

ZZ572/620
For muscle car, off-road and street-rod enthusiasts, there’s nothing more important than power. From the start line to red line, big thrust under the hood is a must. GM Performance Parts fills that need by introducing GM’s largest, most powerful street engine, the 620 horsepower ZZ572. This big rippin’, tire burnin’, butt kickin’ V-8 is for those who think excess is barely enough.

“The excitement of ‘seat of the pants’ muscle under the hood is what real hot rodders are looking for when they build up their dream machine,” said Will Handzel, program manager, GM Performance Parts. “The ZZ572/620 has all the essential ingredients that make a hot rod really ‘hot’ with the added reliability that only GM’s engineering and durability testing can provide.”

To start, this all new race block is filled with a forged 4340 steel crank with a 4.375-inch stroke, shot peened forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins.

A new GM, tall-deck single-plane intake manifold and 850 CFM Demon carburetor deliver enough air and fuel to make 620 horsepower at 5500 rpm, and 650 ft.-lb. of torque at 4500 rpm. And, because of the redesigned rectangular port aluminum cylinder heads, all this power and performance is delivered with a gas-pump friendly 9.6 to 1 compression ratio.

ZZ572/720R
For serious racers who need great off-the-line power that’s there round after round, the GM Performance Parts 720 horsepower ZZ572 is the real deal. Built around the all-new Gen VI tall-deck Bow Tie cylinder block, this all-new race block is similar to the 620 hp ZZ572 but has more compression and a more aggressive camshaft.

“This drag racing engine is filled with hard core race parts for hard core performance and durability,” Handzel said. “It’s the engine that’s intended to quickly and consistently get a racer down the track, pass after pass, season after season. It’s probably the only ‘race engine’ on the planet that has been through ‘durability schedule’ dyno testing to provide power for a long, long time.”

The rectangular port aluminum cylinder heads produce a race gas only, 12 to 1 compression ratio, and combines with the GM tall-deck plane-intake manifold and 1095 CFM Demon carburetor to deliver 720 horsepower at 6250 rpm and 685 lb.-ft. of torque at 4500 rpm.
Since both ZZ572 engines are built in multiple completion levels – short block, base engine with intake and as a deluxe engine with carburetor and distributor – they fit any budget, usage and application.

Ecotec Supercharged 2.0-liter
For those looking to boost the performance of their small car or off-road vehicle, GM Performance Parts offers a ready to install, out of the crate solution. The Ecotec supercharged 2.0-liter for 2004 slams out an impressive 200 horsepower (estimated) at 6200 rpm and 200 lb.-ft. torque (estimated) at 4400 rpm.

At the heart of this powerful engine is an Eaton M62 helical Roots-type supercharger. GM Engineers chose the Eaton unit because of its optimum response characteristics and ease of “packaging” with the Ecotec architecture. With a maximum boost of 12 pounds, and an air to water intercooler, this unit delivers enhanced power and reduces a supercharged engine’s propensity to “knock” at high boost levels.

To attain the durability targets, the Ecotec supercharged 2.0-liter received upgraded components in critical stress areas. Experience in the tortuous crucible of the NHRA’s Championship Drag Racing series – where Ecotec has developed a “bullet-proof” reputation as a formidable powerplant for front-wheel drive dragsters – told engineers where the production supercharged Ecotec would most benefit from heavy-duty components. The result: a package built to deliver power on demand time after time, year after year.

Consumers can purchase GM Performance Parts engines from any GM dealership. To locate the closest dealer, call 1-800-GM USE US or visit www.gmaccessorieszone.com.

 

  ZZ572/620 ZZ572/720
Horsepower 620 @ 5500 rpm 720 @ 6250 rpm
Torque 650 lb-ft @ 4500 rpm 685 lb-ft @ 4500 rpm
Max rpm Recommended 6000 rpm 6750 rpm
Compression Ratio 9.6:1 12:1
Block new Sportsman Tall Deck Bowtie Gen VI 10.200” deck height new Sportsman Tall Deck Bowtie Gen VI 10.200” deck height
Bore 4.560” 4.560”
Stroke 4.375” 4.375”
Crankshaft forged 4340 steel forged 4340 steel
Connecting Rods forged 4340 steel
H-beam style
shot peened
forged 4340 steel
H-beam style
shot peened
Pistons forged aluminum
full floating wrist pin
forged aluminum
full floating wrist pin
Piston Rings plasma-moly rings plasma-moly rings
Camshaft hydraulic roller
valve lift: 632” l, 632” E
duration @ .050” 254°l, 264° E
mechanical roller
valve lift: .714” l, .714” E
duration @ .050” 266°l, .274° E
Lifters hydraulic roller tappet mechanical roller tappet
Cylinder Heads aluminum rectangular port
118cc combustion chamber
aluminum rectangular port
118cc combustion chamber
Intake Valves 2.25” stainless steel 2.25” stainless steel
Exhaust Valves 1.88” stainless steel 1.88” stainless steel
Valve Springs dual valve springs
1.540” coil diameter
1.800” installed height
197 lbs. seat pressure
dual valve springs
1.567” coil diameter
2.050” installed height
230 lbs. seat pressure
Spring Retainers hardened chromemoly steel hardened chromemoly steel
Rocker Arms aluminum roller rockers 1.7:1 ratio aluminum roller rockers 1.7:1 ratio
Push Rods high performance one piece high performance one piece
Intake Manifold new aluminum tall deck single plane 4150 series carburetor aluminum tall deck single plane 4500 series carburetor
Carburetor 850cfm, mechanical secondary 1095cfm, mechanical secondary
Rear Main Seal new one-piece design new one-piece design
Windage Tray new, screened and louvered new, screened and louvered
Damper high rpm torsional damper high rpm torsional damper
Distributor H.E.I multiple spark discharge
Ignition Timing 36º total advance 36º total advance
Spark Plugs R42XLS R42XLS
Fuel 92 octane race fuel
Part Number for ZZ572/620 Description
12499190 partial (9:1 comp)
12498792 base (9:1 comp)
12498793 deluxe complete (9:1 comp)
Part Number for ZZ572/720 Description
12498825 partial (12:1 comp)
12498826 base (12:1 comp)
12498827 deluxe complete (12:1 comp)

Ecotec supercharged 2.0-liter specifications:

Part number  
Type 2.0L I-4 supercharged
Displacement 1998cc (122 ci)
Compression ratio 9.5:1
Valve configuration dual overhead camshafts (4 valves per cylinder)
Assembly site Kaiserslautern, Germany
Valve lifters hydraulic roller finger follower
Firing order 1 - 3 - 4 - 2
Bore x stroke 86 x 86mm
Fuel system sequential fuel injection with high pressure (56 psi)
Horsepower 200 hp (149 kw) @ 6200 rpm (estimate)
Torque 200 lb-ft (271 Nm) @ 4400 rpm (estimate)
Fuel shut off 6500 rpm
Emissions controls three-way catalyst
Applications Saturn ION Red Line
MATERIALS
Block cast aluminum with cast iron cylinder liners
Cylinder head cast aluminum
Intake manifold aluminum
Exhaust manifold cast iron
Crankshaft forged steel with induction hardened fillet
Camshaft cast iron
Connecting rods forged steel
Additional features extended life platinum spark plugs and coolant
electronic throttle control