holy crap, i just noticed that the link provided
isn't from GM itself. don't tell that you people, the supposed resource for GM inside information, are too lazy to go to media.gm.com to read the press releases each day, and
actually rely on this site for news. i in no way mean any disrespect to the people here, but some of the info on this board comes at a much later date than what is posted originally at some official sites, and you guys even have paid advertising. my auto board doesn't have a single ad, nor does it censor what is said. but i guess i've been aclimatized to the concept of free speech, and the fact that i'm not inundated with GTO ads that freeze my computer and suck my RAM up... anyway, enough of me venting.
here are some specs from GM. BTW, there's two or three tables that i can't include here, so i suggest going to the site.
http://media.gm.com/events/sema/sema03gm/s...PO_Engines.html
***
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.