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Old 04-27-2007, 10:27 AM   #1
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Yeeha!! 2008 Corvette Gets Big Boosts of Both Power and Torque

Article HERE.


Yeeha!! 2008 Corvette Gets Big Boosts of Both Power and Torque

Remember the spy shots of the LS3 engine we showed you the other day? Turns out that it was in fact the aluminum, variable valve timed 6.2-liter unit out of the Escalade, although heavily tweaked to the tune of 430 hp and 424 lbs. ft. of torque (up from 400-flat for both). Basically, Chevy slapped on LS7-ish heads (featuring bigger ports) and high-flow fuel injectors right out of the Z06. What's that? You want more? Well, you get more as the new 'Vette, going back to its ZR-1 roots, is (kinda) bi-modal. Check the new dual-mode exhaust option and power nudges up to 436 horses and 428 lbs. ft. of twist. That means the top speed is 190mph and the automatic will hit 60 mph in 4.3 seconds. The revised pipes supposedly sound better, too. Chevy has also spruced up the interior and exterior, offering two new colors. Our crack analysis? Keys, please. And what of the mighty Z06? Unchanged for now, though the Blue Devil lurks just over the horizon. Full press release after the jump. – Jonny Lieberman
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Old 04-27-2007, 10:28 AM   #2
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Here's the press release. It's a little long, but it's got lots of good stuff.



Press Release

2008 CORVETTE: ICONIC SPORTS CAR RECIEVES LARGER, MORE POWERFUL LS3 6.2L V-8 AND HOST OF DRIVING, INTERIOR REFINEMENTS

Get comfortable. There's so much new and exciting with the 2008 Corvette that you'll want to grab a hot drink, sidle up to your computer screen and absorb all the details.

The changes involve everything from an all-new, larger and more powerful V-8 engine to refinements in driving characteristics that solidify the Corvette's position as the preeminent American sports car - and further the argument that it is one of the world's best. There are also a host of exterior and interior refinements that raise the Corvette's luxury status and enhance the feeling of craftsmanship.

"Corvette is an uncompromising sports car that rewards its owners with impeccable performance and great comfort," said Ed Peper, Chevrolet general manager. "The changes and enhancements to the 2008 Corvette reflect continual improvements that speak to Chevrolet's unflagging commitment to building the best sports car - and with nearly 55 years of experience, the Corvette just keeps getting better and better."

Also back again for '08 is the 505-horsepower Corvette Z06, an American super car that has won over enthusiasts, journalists and racers around the world for its balance of racetrack-bred performance, daily-driving civility and value.

Here's a look at the new and enhanced features for '08 Corvette models:

Engine - A new, 6.2L LS3 small-block V-8 is the standard engine in Coupe and Convertible models. It is rated at 430 horsepower (321 kW)* and 424 lb.-ft. of torque (586 Nm)* with the standard exhaust system; with the new, optional two-mode exhaust system, power ratings increase to 436 horses / 325 kW and 428 lb.-ft. / 592 Nm. As a result, the standard Corvette is true supercar, capable of 190 mph. The LS3 with the six-speed paddle-shift automatic is the fastest automatic-equipped Corvette ever, with 0-60 mph capability of 4.3 seconds.

This new iteration of the storied small-block family features a revised, larger-bore cylinder block - 4.06-inch / 103.25 mm vs. the previous 6.0L's 4.00-inch / 101.62 mm bores - high-flow, LS7/L92-style cylinder heads; larger-diameter pistons; revised camshaft and camshaft timing; revised valvetrain with offset intake rocker arms; high-flow intake manifold; high-flow fuel injectors from the Z06's LS7 engine; and a new engine beauty cover.

The LS3 features an aluminum cylinder block with cast iron cylinder liners. In addition to its larger bores, which help create a 376-cubic-inch displacement, the block casting also features revisions and machining in the bulkheads that enhance its strength and improved bay to bay breathing. But while the bore of the 6.2L engine is increased when compared with the previous 6.0L engine, the engine's stroke remains at 3.62 inches (92 mm). The pistons for the larger 6.2L engine also are new and are designed for its high-rpm performance capability.

Breathing for the new 6.2L engine is accomplished via new, high-flow cylinder heads. They're based on the large port/large valve design found on the LS7 engine and other GM L92 engines, with larger-capacity, straighter intake ports. The design optimizes intake flow to the combustion chamber and the exhaust ports are also designed for better flow.

Complementing the larger-port design of the heads are commensurately sized valves. The intake valve size alone increases from 2.00 inches (50.8 mm) to 2.16 inches (55 mm) - an increase of nearly 9 percent. The intake valves feature lightweight hollow stems, which enable the engine's 6,600-rpm capability. The exhaust valves also are large, measuring 1.60 inches (40.4 mm) in diameter.
To accommodate the engine's large valves and enable more direct intake port flow, the intake-side rocker arms are offset 6 mm between the valve tip and the push rod. Actuating the valves is a new camshaft, with intake-side lobes providing more than a 5-percent percent in increase in lift, from 0.521-inch to 0.551-inch (13.25 mm to 14 mm). Exhaust-valve lift remains unchanged from the LS2. The camshaft timing was revised to optimize performance with the higher-lift intake cam profile.

Ensuring the cylinder heads receive all the air they can handles falls to a new, acoustically tuned intake manifold. The composite design is manufactured with a "lost core" process that improves runner to runner variation and reduces airflow losses. An acoustic foam material is used to reduce radiated engine noise; it is sandwiched between the outer top of the manifold and an additional "skull cap" acoustic shell. Also new beauty covers atop the engine shield the rocker covers and also feature a noise-reducing, acoustically tuned insert to provide a more refined engine sound.

Exhaust system - Optional on '08 Coupe and Convertible models is a new, two-mode performance exhaust system. Similar in design and function to the system used on the Z06, the dual-mode exhaust uses vacuum-actuated outlet valves, which control engine noise during low-load operation, but open for maximum performance during high-load operation. It is not identical to the Z06 system; the Coupe/Convertible uses a 2.5-inch-diameter exhaust, while the Z06 uses a three-inch system.

With the new, dual-mode performance exhaust, power output for Coupe/Convertible rises from 430 horsepower (321 kW) and 424 lb.-ft. of torque (575 Nm) to 436 horses (325 kW) and 428 lb.-ft. (580 Nm). This system gives the Corvette a more aggressive exhaust sound character that will appeal to performance enthusiasts.

Transmissions and axle ratios - The shifting efforts for both the six-speed manual transmission and paddle-shift six-speed automatic transmissions have been improved in '08 Corvette models. The manual transmission shifting improvements include a more positive and direct feel during gear changes, with better gate-to-gate location.

The six-speed paddle-shift automatic transmission on Coupe and Convertible is improved with new hardware and a new controller calibration that deliver quicker shifts. This change bolsters the feeling of performance and driver control when using the shifting paddles.

Also new for '08 models is the availability of the 2.73 performance axle ratio with the automatic transmission. It is included with the Z51 package.
Steering system - The Corvette's precise rack-and-pinion steering system is revised to provide improved feel at all speeds. The revisions are due to a new, premium machining process of the system's internal components, a new, stiffer intermediate shaft and controller calibration changes.

Wheels - Corvette Coupe and Convertible models come with a new split-spoke wheel design for '08. The design was introduced on the limited-edition '07 Indianapolis 500 Pace Car replicas with a Sterling Silver finish. The standard 18-inch front wheels and 19-inch rear wheels feature a Sparkle Silver finish, with a Competition Gray version optional.

Also new is a distinctive, performance-oriented forged aluminum wheel for Coupe and Convertible. It comes in a polished finish.

Exterior colors - There are two new premium exterior colors available with 2008 Corvette models: Jetstream Blue Metallic Tintcoat and Crystal Red Metallic Tintcoat; they replace Le Mans Blue Metallic and Monterey Red Metallic Tintcoat.

Custom Leather-Wrapped Interior Package - Available on Coupe, Convertible and Z06 models, the new Custom Leather-Wrapped Interior Package offers a stylish, two-tone leather-appointed cabin with details that enhance the feeling of Corvette's craftsmanship.

Details include:
• Two-tone, leather-wrapped upper and lower instrument panel, door pads and seats
• Choice of new, exclusive colors: Linen or Sienna, with unique color breakup
• Padded door panel armrests
• "Corvette" embroidered on passenger-side dash pad
• Embroidered crossed flags logo on headrests
• Unique center trim plate with Bias pattern.

Interior enhancements - All models feature a new wrapped instrument panel center trim plate, with bright surrounds for the shifter and cupholder. There are also new metal-finish door sill plates that greet passengers as they step into the vehicle, as well as a new lighted control knob for the available Magnetic Selective Ride Control.

Feature changes and enhancements - All Corvette models now come standard with features that were previously optional or part of equipment packages. They include:
• OnStar with available Turn-By-Turn Navigation
• XM Satellite Radio
• Auto-dimming rearview mirrors (with compass)
• Audio input jack on all radio systems except navigation; Personal Audio Link is available as a dealer-installed item with the navigation system.
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Old 04-27-2007, 10:34 AM   #3
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Awesome beyond words. If the Camaro wasn't coming out I'd be over that.
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Old 04-27-2007, 11:44 AM   #4
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Awesome beyond words. If the Camaro wasn't coming out I'd be over that.
I would love to be all over that, but $45,000 is a little outta my price range, especially for a car I would only be able to drive 6-8 months out of the year .

However, I wonder what this big of a change in the C6 will do to the 2007 model prices.... I bet you will be able to snag an '07 C6 for under 40K now...
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Old 04-27-2007, 11:57 AM   #5
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BTW, I don't care what I have to do, I will own an LS3 Camaro. No L76 for me. Even if i have to sell my left arm, there will be one in my driveway (although it would be an automatic if that were the case ).

Ok, just kidding about the arm bit, but I will have the LS3 version... I mean 430 HP! Wowzers!
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Old 04-27-2007, 12:28 PM   #6
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Old 04-27-2007, 01:02 PM   #7
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Sometimes the brain gets warped by all the insane numbers that are casually tossed around the automotive press... it dawned on me when I was reading this that I was thinking ' aw shucks, I wanted more..' then I realized WHAT 436hp is.. and its insane. 436hp and 428lbft? That's just flippin awesome.

I love GM, they do us proud.

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Old 04-27-2007, 03:32 PM   #8
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Sometimes the brain gets warped by all the insane numbers that are casually tossed around the automotive press... it dawned on me when I was reading this that I was thinking ' aw shucks, I wanted more..' then I realized WHAT 436hp is.. and its insane. 436hp and 428lbft? That's just flippin awesome.

I love GM, they do us proud.

~LSx
I know what you mean. When i first read that I thought... Man, I was hoping for 450. Then i stopped and thought to myself, the last Camaro had about 350 HP... that is nearly 100 more.... and the Mustang GT has 300... 430 is awesome!
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Old 04-27-2007, 03:51 PM   #9
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I know what you mean. When i first read that I thought... Man, I was hoping for 450. Then i stopped and thought to myself, the last Camaro had about 350 HP... that is nearly 100 more.... and the Mustang GT has 300... 430 is awesome!
Yeah, when it really comes down to it, 430hp is pretty unbelievable. AND its easy to forget that the accompanying torque is MUCH higher than many competing cars... Mustang GT = 320lbft, 2009 BMW M3 = 295lbft, etc. I think this will make the Camaro FEEL even faster than maybe the numbers would indicate. Big torque down low will do a lot... big horsepower only lets you get to a higher top speed.

Either way, pretty soon we'll all be celebratin'

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Old 04-27-2007, 04:21 PM   #10
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Yeah, when it really comes down to it, 430hp is pretty unbelievable. AND its easy to forget that the accompanying torque is MUCH higher than many competing cars... Mustang GT = 320lbft, 2009 BMW M3 = 295lbft, etc. I think this will make the Camaro FEEL even faster than maybe the numbers would indicate. Big torque down low will do a lot... big horsepower only lets you get to a higher top speed.

Either way, pretty soon we'll all be celebratin'

~LSx
This almost makes me want to figure out how to buy a new vette instead of the Camaro, but I must be disciplined and patient.

The only thing is that the current 300hp/320 ft-lb Mustang GT isn't a competitor to the Camaro. The current Mustang GT really doesn't have a competitor with the exception of import cars like the RX-8, 350Z, and Mitsubishi Eclipse GT.

Ford will have something to answer back with the Mustang. It might not be a 430 hp car like the Camaro, but it will have alot more than 300hp.

There is a good battle coming ahead between Ford, Dodge, and GM. I don't think this will be a walk in the park for GM, but the best fought battles are the challenging ones.

Here's to the future
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Old 04-30-2007, 09:28 AM   #11
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New for 2008

All-new LS3 6.2L V-8 engine for Coupe and Convertible:
430 hp (321 kW)*
424 lb.-ft. of torque (575 Nm)*
436 hp / 428 lb.-ft. (325 kW / 580 Nm)* with new, optional dual-mode exhaust system
High-flow cylinder heads
Enhanced valvetrain
High-flow intake manifold
Larger-bore block with structural enhancements
Improved manual transmission shift effort
Quicker shift times on paddle-shift six-speed automatic
2.73 performance axle ratio available with six-speed paddle shift; included with Z51 package
Improved steering feel
Standard split-spoke cast aluminum wheel design for Coupe and Convertible (Competition Gray finish optional)
Available polished forged aluminum wheel design
New Keyless Access remote key fob with integrated key
Interior trim enhancements for all models, including wrapped center trim plate with Cyber pattern and new, brushed aluminum accents
Custom Leather-Wrapped Interior Package available for all models in exclusive, new Linen and Sienna colors
New sill plates
iPod/MP3 jack included on all sound systems except navigation (Personal Audio Link available as accessory for navigation system)
OnStar and XM Satellite Radio standard on all models
Auto-dimming mirrors with compass standard on all models
Two new premium exterior colors: Jetstream Blue Metallic Tintcoat and Crystal Red Metallic Tintcoat
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Old 04-30-2007, 02:15 PM   #12
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All of that is marvelous, except that I personally like a little more than 2.73s out back, but hey that is just me
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Old 04-30-2007, 07:56 PM   #13
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Sounds awesome.. i want one.. but maybe in 5 years.. not that quickly.. new job has to pick up some first!
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Old 05-01-2007, 08:11 AM   #14
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Several of my "car rags" arrived in the mail last week. One of them has some more info. on the "Super Vette". Here's the highlights;

-Right now, the leading candidate for a name, ZO7.
-"ZO7" in the neighborhood of 700HP.

It was also written that once the C7 arrives, the "basic" C7 will have HP comparable to the current ZO6, and the ZO(whatever) will be around 700HP.

I'd take that with a grain of salt. But it'll be great of there's any truth to it.
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