figured this was as good of a place as any to put this:
http://www.edmunds.com/insideline/do...ticleId=125496
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figured this was as good of a place as any to put this:
http://www.edmunds.com/insideline/do...ticleId=125496
CHEVROLET ANNOUCES CERTIFIED POWER RATINGS FOR THE NEW CHEVROLET CORVETTE ZR1: 638 HP FROM THE SUPERCHARGED LS9 V-8
http://www.blogsmithmedia.com/www.au...09pt_ar001.jpg
PONTIAC, Mich. – When it was introduced at the North American International Auto Show in Detroit earlier this year, the 2009 Chevrolet Corvette ZR1's power was estimated at 100 horsepower for each of its 6.2 liters of displacement. GM Powertrain has completed SAE certification of the ZR1's supercharged LS9 V-8 and the results exceed the estimate: 638 horsepower (476 kW) and 604 lb.-ft. of torque (819 Nm).
The LS9's output is nearly 103 horses per liter, or just about 1.7 horses for each of the engine's 376 cubic inches. It is unquestionably the most powerful automotive production engine ever manufactured by General Motors and enables the Corvette ZR1 to achieve a top speed of more than 200 mph (322 km/h).
"One of the most amazing things about the Corvette ZR1 is the level of refinement that our designers and engineers have attained. Even with all that power, this car has road manners that will allow our customers to enjoy it on the streets as a daily driver, and on the track," said Chevrolet General Manager Ed Peper.
The Corvette ZR1 goes on sale this summer. Its 638-hp supercharged engine is complemented in the chassis by heavy-duty components not offered in any other model, including a six-speed manual transmission with race-hardened gears and dual-disc clutch technology that delivers exceptional clamping power and lower inertia, as well as strengthened axle components.
Fuel economy testing has not been completed, but engineers are confident the ZR1 will be the most fuel-efficient 600-plus-horsepower car on the market.
The LS9 engine is hand-built by specially trained technicians at GM's Performance Build Center in Wixom, Mich. It is a unique, small-volume engine production facility that also builds the Chevrolet Corvette Z06's LS7 engine and other high-performance GM production engines.
"Developing the LS9 involved more than simply striving for a great horsepower number. Endurance and reliability testing have shown the engine to be robust and low-maintenance, just like other engines in the small-block family," said Sam Winegarden, executive director, engine engineering for GM Powertrain. "That it is distinguished as the most powerful engine ever from General Motors is a source of immense pride among everyone involved with the LS9."
Supercharged aspiration
The key enabler of the LS9's performance is the industry's first production application of a new, positive-displacement Roots-type supercharger that has a unique four-lobe rotor design. Its design promotes quieter and more efficient performance, while the large, 2.3-liter displacement ensures adequate air volume at high rpm. Maximum boost pressure is 10.5 psi (0.72 bar). It is teamed with an integrated charge cooling system that reduces inlet air temperature for maximum performance.
"The combination of large displacement and the new, four-rotor design broadens the effective range of the supercharger, allowing the engine to make more power at lower rpm and sustain it throughout the power band," said Winegarden. "The low-end torque is tremendous and the high-rpm charge from the supercharger is simply amazing."
A raised hood provides adequate clearance for the LS9, while a polycarbonate window in the hood provides a view of the engine beneath it.
LS9 details
The LS9 features many unique design and manufacturing details that support its high-performance nature. They include:
Aluminum cylinder block with iron cylinder liners that are finish-bored and honed with a deck plate installed
Forged steel crankshaft with a nine-bolt flange
Titanium connecting rods and forged aluminum pistons
Stronger, rotocast cylinder heads with 2.16-inch (55 mm) titanium intake valves and 1.59-inch (40.4 mm) hollow-stem, sodium-filled exhaust valves
Camshaft with 0.555-inch (14.1 mm) lift for excellent idle and low-speed driving qualities
A dry-sump oiling system with 10.5-quart (9.9 liters) capacity
Integrated oil cooler and piston-cooling oil squirters
Specifications
LS9 6.2L SUPERCHARGED V-8
Displacement (cu in / cc): 376 / 6162
Bore & stroke (in / mm): 4.06 x 3.62 / 103.25 x 92
Block material: cast aluminum
Cylinder head material: A356-T6 rotocast aluminum
Valvetrain: overhead valve, 2 valves per cylinder
Fuel delivery: SFI (sequential fuel injection)
Compression ratio: 9.1:1
Horsepower / kW: 638 / 476 @ 6500 rpm
Torque (lb-ft / Nm): 604 / 819 @ 3800 rpm
Fuel shut-off (rpm): 6600
Recommended fuel: premium required
Exhaust manifolds: stainless steel
Main bearing caps: forged steel
Crankshaft: forged steel
Camshaft:n hollow steel; 0.555-in (14.1 mm) lift
Connecting rods: forged titanium
Valves:
intake: titanium
exhaust: hollow steel
Valve lifters: hydraulic roller
Supercharger: R2300, four-lobe "Roots" type (2.3L)
Additional features: piston oil-spray cooling; direct-mount ignition coils; 11-rib accessory drive
http://www.cadillac.com/_res/i/footer/tmb/chevrolet.jpg
and
http://www.brightcove.tv/title.jsp?title=1519677836
By: Tadge J. Juechter
Corvette Chief Engineer
2008-April-25
I know many of you are interested in the latest details on the new Corvette ZR1. We’ve been working on the car for a while now and recently, we decided to put the pedal to the metal and see just how fast it could go.
On a cool day with light wind in early April, the Corvette Development Engineering team took it to the test track in Papenburg, Germany. The ZR1, with its 638 horsepower supercharged LS9 V-8 engine, clocked in at a staggering 205 miles an hour (330 km/h). We’re thrilled with the results and excited for it to hit the streets. We even brought a camera along for the ride to document our experience. Check out the video posted above.
**** yeah
dat ***** is a beast...
A streetable NASCAR competitor!
probably the first time the pace car will actually be competitive with the cars of the race series!
that's right, top speed in 6th gear
http://www.brightcove.tv/title.jsp?title=1519677836
so i was going 165ish.......and then i grabbed 6th:gigem:Quote:
Originally Posted by agjohn02
my question is, does he adjust the A/C vent just before he starts the run at 100 mph? or resetting the trip odometer? maybe switching it over to the instant fuel economy display...
That was at the bottom of Brandon's post....ass! :flipoff2:Quote:
Originally Posted by agjohn02
The first time I have seen the white stripes truly look like a near solid line. :eek: I would think you would need ballistic glass up front incase you ever hit a bird or something. I have seen what kind of damage a buzzard does at 60, a humming bird at 205 would decapitate you. :D
**** yo' Nissan GT-R
http://jalopnik.com/397308/corvette-...rgring-in-7264
Did anybody click on the other article links. the lap time one...It has other cars and their lap times. fastest ever was the Porsche 959. did it in 6min 11 sec! The article stated what's even more amazing is that it was done 25 yrs ago.
It also talked about an SR8...I had no idea what that was... found this:
http://www.youtube.com/watch?v=ISev_EPA6uE
That's fast.
The 956 has a place for a license plate? Would hardly classify it in the same category as a vette.
I saw an Audi R8 in Frisco yesterday, nice looking car.
Something tells me that article isn't exactly accurate. If a 959 did it that fast, it sure as **** wasn't the "road version". This car did it in 6:55.Quote:
Originally Posted by Graystroke
http://www.radicalextremesportscars....ring/index.php
EDIT: I just realized that Grayson put 959 when they were talking about a 956. BIG difference! I can't see the videos here at work so I didn't know until I started reading the comments below the article. Still though, that's not even a fair comparison.
oops, I was thinking 959 not 956. wasn't comparing. just stating.
ya'll don't need to get your LS based GM panties in a wad!:flipoff2:
Whatever, it's too close to the 4th for you to be even talking about other countries! America...FAWK YEAH!!
hehe, no, I wasn't getting them in a wad. It just sounded like you weren't impressed that a bone stock ZR1 that carries a 3yr/36000 warranty is that f'n fast.
Don't get me wrong, I love the looks of a 956...those things were evil. Short lived career, but evil none the less.
Speaking of short lived....this is definitely one of my favorite "what could have been" race cars. The Jaguar XJ13.
http://www.ultimatecarpage.com/car/222/Jaguar-XJ13.html
a ZR1 isn't really a Vette either by that logic, they are both tuned production models.Quote:
Originally Posted by BMFScout
I bet they make more than 150 ZR1's.
I think I read something like 1500-2000 a year.
holy crap, they are going to build 2000 a year?
They averaged about 1400 per year in the 5 year run of the old ZR1's. 6939 total in 5 years.
Fixed it.Quote:
Originally Posted by Graystroke
i was getting a little confused when Jimmy switch to a 956, I was thinking 959. Other thing to bear in mind is that was 25 years ago, what is the comparable P car time now? I have no idea, just throwing that out there. I love the performance of the vettes, but I am with Clarkson on the fit and finish. You still have to drive it everyday, for that money I don't want to see a GM truck radio.
Quote:
Originally Posted by Fredo
Make sure you turn up your speakers.
http://www.youtube.com/watch?v=HJpjr...eature=related
Don't go quoting wiki like it's fact. Please notice the NOTES section to the right.Quote:
Originally Posted by Jackasic
don't get in a tither, i just post the first list I found, heck that one doesn't even have a 959 on it.
I'm not in a tither...I just can't believe you of anyone would believe wikipedia to be accurate. :)
it's close, thats about all we need here ;) We all know that VW's are the best cars EVER!!!111!!!!11!!!!
don't forget that the gearbox is rubbish and that the bumpers are plastic.Quote:
Originally Posted by Jackasic
I'll definitely agree with the latter and I can see where he comes up with the former after riding in a few nice cars.
this may count as porn for Fred: http://videos.streetfire.net/video/2...LS9_168134.htm
they put that whole engine together in 6 minutes!! dayum!
Nah, that Jag I posted does make me feel funny in the swimsuit area, but watching them assemble that motor, not so much. I do really like how they torque the headbolts on LS motors though.
May be a R, but saw on barrett jackson last night that the first production ZR1 sold for a mil
No Maybe About It....