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Discussion Starter · #1 · (Edited)
This thread is only for official GM information on how the 2015 Corvettes will be new or different!

As some of our forum members are already posting and debating whether to wait for a 2015, it is imperative that this thread only contains accurate information. Consequently, this thread will be tightly controlled, for this thread is only for what GM has officially stated will either be different or new for the 2015 Corvette. This is NOT a thread for speculation, nor beliefs, nor hopes, nor "my cousin is an engineer who works at GM and he said that all 2015 Corvettes will only come in pink." We all remember the many bogus rumors about the upcoming C5, the C6, and the C7, and already the 2015 rumor mill is running rampant.

If you wish to start a separate thread on what someone has stated, or someone believes, or how you hope something will be different for the 2015's, feel free, but please entitle that thread in a way that makes it clear that it is speculation, such as calling that thread "Hopes & Beliefs:How the '15's Might Be Different."

Please THEREFORE do not post anything unless you cite the GM source or link. If no GM source is cited, the info posted here will be questioned, and removed if not verfied.

1). Source:, December 5, 2013:

Chevrolet to Introduce 2015 Corvette Z06 at Detroit Show

Chevrolet to Introduce 2015 Corvette Z06 at Detroit Show

2). Source:, January 4, 2014:

2015's will offer optional Performance Data Recording (PDR):

Fast Feedback: Corvette Performance Data Recorder

3). Source:, January 5, 2014:

2015's will offer 4G LTE & APs:

Chevrolet Accelerates to 4G LTE Speeds in 2014

Thank you!

4,607 Posts
Two new colors: "We spoke with Corvette Exterior Manager Kirk Bennion about the colors and he confirmed with us that 2014 will be the last year for the popular medium/dark Cyber Gray. GM uses different names internally than what we know, and the internal color name is called “Fusion Gray." You can see the difference between the two colors with the “Shark Gray” being a medium gray, though still metallic.

NCM Bash Update Notes: Official Name for new Gray is "Shark Gray." Also confirmed was that 2014 will be the last year for Lime Rock Green, to be replaced by "delayed availability" Daytona Sunrise Orange -- though, as of yet, we have no idea whether delayed availability means a week, a month, or ?

Senior Member
18,670 Posts
Discussion Starter · #3 ·
Source:, 1.13.14

Z06 Information:

DETROIT – Chevrolet today introduced the most track-capable Corvette in the brand's history – the 2015 Corvette Z06. It elevates the performance envelope for Corvette with unprecedented levels of aerodynamic downforce, at least 625 horsepower from an all-new supercharged engine, and an all-new, high-performance eight-speed automatic transmission – all building on the advanced driver technologies introduced on the Corvette Stingray.

"The new Z06 delivers levels of performance, technology and design that rival the most exotic supercars in the world," said Mark Reuss, president, General Motors North America. "And the Z06 leverages the engineering expertise of GM, offering the choice of two world-class transmissions, supercar performance without supercar fuel consumption, and technologies that make it easier to fully enjoy the incredible experience of driving it."

The 2015 model is the first Corvette Z06 to offer a supercharged engine, an automatic transmission and, thanks to a stronger aluminum frame, a removable roof panel. The new, supercharged 6.2L engine is expected to deliver at least 625 horsepower (466 kW), and can be matched with either a seven-speed manual or an all-new, high-performance eight-speed automatic transmission with paddle shifters for manual control. The aluminum frame carries over from the Corvette Stingray and will also be used essentially unchanged for the Corvette Racing C7.R.

A track-focused Z07 Performance Package adds unique components for true aerodynamic downforce, Michelin Pilot Super Sport Cup tires for enhanced grip, and Brembo carbon ceramic-matrix brake rotors that improve braking performance and contribute to greater handling through reduced unsprung weight. Although development testing is ongoing, the Z07 package has already recorded some of the fastest lap times ever for a Corvette, surpassing even the ZR1.

"The Corvette Z06 is a great example of the technology transfer between racing and production Corvettes," said Tadge Juechter, Corvette chief engineer. "First, we took what we learned on the Corvette Racing C6.R and applied that to the all-new Corvette Stingray. Then, using the Stingray as a foundation, the Z06 and C7.R were developed to push the envelope of performance on the street and the track."

Supercharged, efficient performance
The heart of the 2015 Corvette Z06 is the all-new LT4 6.2L supercharged V-8 engine, expected to deliver an estimated 625 horsepower (466 kW) and 635 lb.-ft. of torque (861 Nm). To balance performance and efficiency, the LT4 leverages the same trio of advanced technologies introduced on the Corvette Stingray: Direct injection, Active Fuel Management (cylinder deactivation) and continuously variable valve timing.

These technologies – combined with the fuel-efficient multi-speed transmissions, aerodynamic design and lightweight construction – help make the new Z06 surprisingly fuel-efficient.

"The supercharged LT4 engine delivers the greatest balance of performance and efficiency ever in the Corvette," said John Rydzewski, assistant chief engineer for Small-Block engines. "It is one of the world's only supercharged engines to incorporate cylinder deactivation technology, enabling it to cruise efficiently on the highway with reduced fuel consumption, but offer more than 600 horsepower whenever the driver calls up its tremendous power reserve."

To maintain the Z06's mass and performance targets, the LT4 engine was designed with a more-efficient, more-compact next-generation supercharger. Even with its integrated supercharger/intercooler assembly mounted in the valley between the cylinder heads, the engine is only about 1 inch (25 mm) taller than the Corvette Stingray's LT1 engine – while delivering nearly 37 percent more horsepower and 40 percent more torque.

The new 1.7L Eaton R1740 TVS supercharger spins at up to 20,000 rpm – 5,000 rpm more than the supercharger on the Corvette ZR1's LS9. The rotors are shorter in length, too, which contributes to their higher-rpm capability – and enables them to get up to speed quicker, producing power-enhancing boost earlier in the rpm band. That boost is achieved more efficiently, thanks to a new, more direct discharge port that creates less turbulence, reducing heat and speeding airflow into the engine.

The LT4 engine also has several unique features designed to support its higher output and the greater cylinder pressures created by forced induction, including:

Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional heads
Lightweight titanium intake valves and machined connecting rods for reduced reciprocating mass
High 10.0:1 compression ratio – for a forced-induction engine – enhances performance and efficiency; enabled by direct injection
Forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures
Stainless steel exhaust headers and aluminum balancer that are lighter than their LT1 counterparts
Standard dry-sump oiling system with larger cooler capacity than Z51; used with dual-pressure-control oil pump.

The LT4 will be built in Tonawanda, N.Y., and Bowling Green, Ky., at the new Performance Build Center.

Eight speeds, no waiting
The supercharged LT4 is offered with a standard seven-speed manual transmission with Active Rev Match, or an all-new 8L90 eight-speed paddle-shift automatic transmission designed to enhance both performance and efficiency.

"Unlike most ultra-performance cars, the Corvette Z06 offers customers the choice between two transmissions to suit their driving styles," said Juechter. "The seven-speed gives the driver the control of a true three-pedal manual transmission with perfect shifts enabled by Active Rev Matching. The new eight-speed automatic offers drivers the comfort and drivability of a true automatic transmission, as well as lightning-fast shifts and manual control for track driving."

The seven-speed manual incorporates rev-matching technology for upshifts and downshifts. This driver-selectable feature can be easily engaged or disengaged via paddles on the steering wheel. The seven-speed is used with a new dual-mass flywheel and dual-disc clutch, which deliver greater shift quality and feel through lower inertia.

The eight-speed automatic is tuned for world-class shift-response times, and smaller steps between gears keep the LT4 within the sweet spot of the rpm band, optimizing the output of the supercharged engine for exhilarating performance and greater efficiency.

For performance driving, the transmission offers full manual control via steering wheel paddles, and unique algorithms to deliver shift performance that rivals the dual-clutch/semi-automatic transmissions found in many supercars – but with the smoothness and refinement that comes with a conventional automatic fitted with a torque converter.

In fact, the 8L90's controller analyzes and executes commands 160 times per second, and wide-open-throttle upshifts are executed up to eight-hundredths of a second quicker than those of the dual-clutch transmission offered in the Porsche 911.

"There's no trade-off in drivability with the new 8L90 eight-speed automatic transmission – it was designed to deliver performance on par with dual-clutch designs, but without sacrificing refinement," said Bill Goodrich, assistant chief engineer for eight-speed automatic transmissions. "It is also the highest-capacity automatic transmission ever offered in a Chevrolet car."

Featuring four gearsets and five clutches, creative packaging enables the GM-developed eight speed automatic to fit the same space as the six-speed automatic used in the Corvette Stingray. Extensive use of aluminum and even magnesium make it more than eight pounds (4 kg) lighter than the six-speed, as well. Along with design features that reduce friction, the 8L90 is expected to contribute up to five-percent greater efficiency, when compared with a six-speed automatic.

The eight-speed automatic will be built at GM's Toledo, Ohio, transmission facility.

Designed for downforce
The performance targets of the Z06 also posed a challenge for the design team, who had to create a striking design that also contributed to increased capabilities.

"Virtually every exterior change served a functional purpose, as this beast needed more of everything," said Tom Peters, Corvette design director, "The flared fenders accommodate larger, wider wheels and tires for more grip. The larger vents provide more cooling air to the engine, brakes, transmission and differential for increased track capability. The more aggressive aerodynamic package generates true downforce for more cornering grip and high-speed stability."

Indeed, the design changes began not with the exterior panels, but the tires.

To deliver the levels of grip needed for the Z06's performance targets, the Z06 was fitted with larger Michelin tires (Pilot Sport tires for the Z06; Sport Cup tires with the Z07 package). The P285/30ZR19 front tires are 1.5 inches wider than the tires on the Stingray, while the 335/25ZR20 rear tires are two inches wider.

To cover the wider tire tread, the fenders of the Z06 were extended by 2.2 inches (56 mm) at the front, and 3.15 inches (80 mm) at the rear. These extensions give the Corvette Z06 a wider, lower appearance that is further emphasized by a unique rear fascia. It incorporates the same taillamp assemblies as the Stingray, but on the Z06 the taillamps are pushed approximately three inches farther apart, toward to edges of the body.

The tires are mounted on lightweight, spin-cast aluminum wheels that are also wider than the Stingray (19 x 10 inches in front and 20 x 12 inches in the rear). Their open, ultralight design showcases the massive Brembo brakes, which are part of the design aesthetic:

The Z06 features two-piece steel rotors, measuring 14.6 x 1.3-inch (371 x 33 mm) front and 14.4 x 1-inch (365 x 25 mm) rear, with aluminum six-piston and four-piston fixed calipers, respectively
The Z07 package adds larger, 15.5 x 1.4-inch (394 x 36 mm) front and 15.3 x 1.3-inch (388 x 33 mm) carbon ceramic-matrix brake rotors for consistent performance lap after lap, and collectively save 23 pounds over the standard Z06 rotors.

To harness the cornering and braking grip afforded by the larger tires and brakes, the exterior of the Corvette Z06 has also been tailored to produce aerodynamic downforce that presses the tires to the ground at high speeds.

The Z06 will offer three, increasing levels of aerodynamic downforce:

The standard Z06 features a front splitter, spats around the front wheel openings, a unique carbon-fiber hood with a larger vent, and the rear spoiler from the Corvette Stingray's Z51 Performance Package
An available carbon-fiber aero package (in either black or a visible carbon-fiber finish) adds a carbon fiber front splitter with aviation-style winglets, carbon fiber rocker panels, and a larger rear spoiler with a fixed wickerbill – a small, vertical tab at the edge of the spoiler that significantly increases downforce
The available Z07 package adds a larger winglets to the front splitter, along with an adjustable, see-through center section on the rear spoiler for track use; with this package, the Corvette Z06 delivers the most amount of aerodynamic downforce of any production car that GM has tested.

The exterior design also reflects the increased cooling required for the new Corvette Z06. For example, the mesh pattern on the front fascia was painstakingly designed to deliver the most possible airflow to the supercharger's intercooler heat exchanger. In fact, the mesh grill directs more air into the engine bay than with the grille completely removed.

The unique grille also features dedicated brake-cooling intakes and wider grille outlets on the bottom serve as air diffusers. The grille is complemented with a larger hood vent, which not only vents hot air from the engine compartment, but contributes to downforce by allowing air driven through the grille to exit through the hood rather than being forced under the car, which could create lift.

Additional cooling elements include larger front fender vents and unique air blades over the inlets on the rear fenders, which force about 50 percent more air into the cooling ducts for the transmission and differential coolers than those on the Stingray. To cope with the additional airflow, the Z06 has also has larger rear-fascia openings than the Stingray.

Standard front and rear brake-cooling ducts, including Z06-signature rear ducts integrated in front of the rear fender openings, are also part of the functional design changes.

Inside, the Corvette Z06 is distinguished from the Corvette Stingray by unique color schemes that emphasize the driver-focused cockpit, and a unique, flat-bottomed steering wheel.

Like the Stingray, the Z06 will be offered with two seating choices: a GT seat, for all-around comfort, and a Competition Sport seat with more aggressive side bolstering, which provides greater support on the track. The frame structure for both seats is made of magnesium, for greater strength and less weight than comparable steel frames. They're also more rigid, contributing to the enhanced feeling of support during performance driving.

The Z06 also benefits from interior details designed for high-performance driving, first introduced on the Stingray, including a steel-reinforced grab bar on the center console for the passenger and soft-touch materials on the edge of the console, where the driver naturally braces during high-load cornering.

The performance-supporting elements inside the new Corvette Z06 are complemented by unprecedented attention to detail and build quality. All models feature a fully-wrapped interior, where every surface is covered with premium, soft-touch materials. Available materials, depending on the trim level, include Napa leather, aluminum, carbon fiber and micro-suede.

Track-proven technologies
The 2015 Corvette Z06 leverages the technologies introduced on the Corvette Stingray, including the strategic use of lightweight materials and advanced driver technologies, with unique features and calibrations tailored for its capabilities.

"Our mission with the seventh-generation Corvette was to make the performance levels more accessible, enabling drivers exploit every pound-foot of torque, every "g" of grip and every pound of downforce," said Juechter. "It's a philosophy we introduced with the 460-horsepower Corvette Stingray – and one that's even more relevant with an estimated 625 horsepower at your beck and call."

For the first time ever, the Corvette Z06's aluminum frame will be produced in-house at the Bowling Green, Ky., assembly plant. It's the same robust, lightweight frame used on the Corvette Stingray and it will also be used essentially unchanged for the C7.R racecars.

The stiffer design of the aluminum frame allows the Corvette Z06 to be offered with a removable roof panel for the first time. In fact, with the lightweight, carbon fiber roof panel removed, the new Corvette Z06 offers 20 percent more structural rigidity than the previous model's fixed-roof design – and a 60-percent increase in stiffness with the roof panel installed.

The new Z06 retains the SLA-type front and rear suspension design of the Corvette Stingray, including, but uniquely calibrated for the higher performance threshold. The third-generation Magnetic Selective Ride Control dampers are standard on Z06, and can be adjusted for touring comfort or maximum track performance via the standard Driver Mode Selector.

Like on the Stingray, the Driver Mode Selector tailors up to a dozen features of the Z06 to suit the driver's environment, including:

Launch control: Available in Track mode for manual and automatic transmissions, providing maximum off-the-line acceleration
Active handling (StabiliTrak stability control): A "competitive" setting is available in Track mode and is more suited for on-track conditions. It can also be disabled, giving the driver complete control
Traction control: Weather mode tailors traction control and engine torque for driving in inclement conditions
Performance Traction Management: Available in Track mode and offers five settings of torque reduction and brake intervention for track driving
Electronic Limited Slip Differential: Adjusts the rate at which the limited slip engages, to balance between steering response and stability in different driving conditions; more aggressive performance in Sport and Track modes.

The smart electronic limited-slip differential (eLSD) is standard on the Z06, to make the most of the torque split between the rear wheels. The system features a hydraulically actuated clutch that can infinitely vary clutch engagement and can respond from open to full engagement in tenths of a second. It shifts torque-based on a unique algorithm that factors in vehicle speed, steering input and throttle position to improve steering feel, handling balance and traction.

The eLSD is fully integrated with Electronic Stability Control and Performance Traction Management systems. Its calibrations vary among three modes, based on the Drive Mode Selector setting:

Mode 1 is the default setting for normal driving and emphasizes vehicle stability
Mode 2 is engaged when electronic stability control is turned off in the Sport or Track modes. This calibration enables more nimble turn-in and traction while accelerating out of a corner
Mode 3 is automatically selected when Performance Traction Management is engaged. This calibration has the same function as Mode 2, but is fine-tuned to work with Performance Traction Management.

The new Corvette Z06 will be available in early 2015. Performance data and pricing will be announced closer to the start of production.

Senior Member
18,670 Posts
Discussion Starter · #5 ·
Source: 1.13.14

Z06 Dealer Quick Reference Sheet:

The Z06 model returns for the 2015 model year (arriving late 2014) and includes elaborate race car strategies that stem from the Corvette racing program, along with a highly advanced supercharged engine, available technologically advanced Performance Data Recorder that records driving experiences on and off the track and a high level of comfort for the everyday drive. Codeveloped alongside the all-new C7.R race car, it shares the same chassis, engine technologies and aerodynamic strategies that combine for an all-new unprecedented Corvette experience.

• Three trim levels – 1LZ, 2LZ and 3LZ
• (LT4) supercharged 6.2L V8 engine with a GM-estimated 625+ horsepower and 635+ lb.-ft. of torque and a trio of advanced technologies that include Direct Injection, Continuously Variable Valve Timing and Active Fuel Management™
• Available (UQT) Performance Data Recorder
• Track-derived exterior design developed alongside the Corvette C7.R race car
––Unique grille with dedicated brake cooling intakes and wider outlets with air diffusers
––Unique carbon-fiber hood with wider hood vent outlet
––Wider front fenders
––Wider quarter panels
––Unique rear fascia
• Available (CFZ) Black carbon-fiber ground effects or (CFV) Z06-unique visible carbon-fiber ground effects
• Standard (EYK) carbon flash or available (EYT) chrome badges
• Four wheel options that include (Q6A) Pearl Nickel, (Q6U) Black, (Q6J) Spectra Gray with Machined Groove and (Q6B) Chrome
• (XFM) P285/35ZR19 front, and P335/25ZR20 rear Michelin® Pilot® Super Sport ZP fitted summer-only tires1
• Unique Z06 steering wheel, badging, interior color breakup, Dark Gray interior and Blue interior
• Available (Z07) Z07 Performance Package
––Michelin® Pilot® Sport Cup 2 ZP fitted tires1
––Carbon ceramic brakes
––Carbon-fiber ground effects
––Splitter package

An industry-first Performance Data Recorder (PDR) will be available on all Corvette models for the 2015 model year. Codeveloped with Cosworth, this fully integrated system allows users to record high-definition video with telemetry overlays of their drive experiences on and off the track. HD-quality videos can be reviewed in the vehicle (when parked) or downloaded to a personal computer for sharing via social media.

• High-Definition Camera
––Mounted within the windshield header trim
––Records the driver’s point of view throughthe windshield
––Self-Contained Telemetry Recorder
––Uses a dedicated GPS receiver that operates at 5Hz (five times faster than the in-dash navigation system) for more precise positioning and corner traces
• Dedicated SD Card Slot
––Located in the glove box
––Allows for recording and transferring video and vehicle data
––Data can be uploaded to Cosworth Toolbox telemetry software (similar to that used by Corvette Racing) to help improve driver’s techniques and lap times

• Track Mode – shows the maximum level of data on the screen, including speed, rpm, g-force, location based map, lap time and more
• Sport Mode – shows fewer details but includes key data including speed and g-force
• Touring Mode – no data overlay, just video and audio
• Performance Mode – records performance metrics such as 0-to-60 MPH acceleration, 1/4-mile speed and elapsed time and 0-100-0 MPH runs

Senior Member
18,670 Posts
Discussion Starter · #8 ·

Senior Member
18,670 Posts
Discussion Starter · #10 ·
Any word on when prices will be announced John?
No news yet. Most are expecting pricing info in early June (that is the expectation from two top dealers here), and consistent with GM allowing formal orders to be placed June 26th (from dealers with 2015 allocation). Timing for 2015 allocation info release is also early June. I do expect that question to come up tomorrow during the final session (it always does). If anything comes up tomorrow, I will immediately post.

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18,670 Posts
Discussion Starter · #11 ·

Senior Member
18,670 Posts
Discussion Starter · #12 ·
Summary of "previously posted" 2015 StingRay changes and Z06 options/features, i.e., while a repeat of previously shared information, included here in this one thread so that all 2015 StingRay changes and Z06 specs/components can be found in one location:

Overall 2015 information:

* Dealers expected to receive 2015 order books late May. Pricing and allocations for StingRay expected in early June -- though so e believe pricing will be the last week of May with the order books. Some believe that GM will start receiving, but not acting upon 2015 StingRay orders in late May; that remains a non-confirmed rumor at this time; almost all believe that GM will not take any action on orders prior to June 26th. No date yet for dealers to receive their StingRay allocations -- though many are thinking early-to-mid June.
* Z06's, as noted before, are on a completely separate, and much later timetable; expected approximate end of August/September timeframe for dealers to receive their Z06 order books and separate Z06 allocations -- with orders going in afterward. Very first customer Z06 coupe deliveries very, very end of 2014, full production in first quarter 2015; Z06 convertibles are expected to start deliveries start of 2nd quarter, 2015. This tiered Z06 production delivery schedule will mandate, at least at the beginning, separate Z06 allocations for coupes vs. convertibles.
* Software updates will no longer require visits to your dealer, but will be electronically sent to you car.
* If Dash trouble light on, it will show exactly what that symbol means on your 8" center LCD display screen.
* All StingRay and Z06 options were previously divulged or are listed below, i.e., no further, "new for 2015 options" forthcoming.
* 2015 StingRays and Z06's share identical ten exterior colors.

2015 StingRay Specific Changes:

* 3LT contains both IWE and PDR , though PDR available for 1LT and 2LT interiors if nav system ordered; thus, another change, you can get a 1LT '15 and get nav system; not confirmed but many believe that unlike the 3LT option, that if you get a 1LT or a 2LT, you can order a nav system without having to also get (pay for) the PDR system.
* Carbon flash badging an option (EYT);
* Shark Gray Exterior Vents available (EXF), as are Body-Colored Exterior Vents (EFY);
* Convertible has optional real carbon fiber tonneau inserts (E57);
* NPP included with all Z-51's;
* OnStar 10.0 with 4G/LTE (Standard)
* If select black carbon fiber aero components on stage 2 or 3, black is "glossy."
* Guage Cluster Additions: MPH can be shown on "Tour"; Instantaneous HP on "Sport";
* Z-51 additionally can show eLSD instantaneous status, as well as "wheel slippage" info;
* Z-51 option package will mandatorily contain NPP for 2015;
* Color changes (previously noted) include "Shark Gray" replacing Cyber Gray; and,
"Daytona Sunrise Orange" replacing Lime Rock Green BUT "delayed availability". When shown the following picture (thanks Manuel Carrillo III), Harlan Charles said the new Daytona Sunrise Orange Metallic was a little lighter, a little brighter than the following picture.

Z06 General Info, Options, Etc:

* Tadge announced that Z06 will go 0-60 in less than 3.4 seconds! (Significance is that GM's announced time for the ZR1 was 3.5 seconds.)
* Months more testing to go, with expected announcements as to final HP & TQ this summer; final tweaking on aero components and MPG specs going into this fall;
* Goal is to make first customer deliveries late, late 2014!
* HUD standard on all Z06's -- as will be previously announced NPP, MSRC, Z-51 options;
* Z06 embossed logo on all GT seats;
* Interiors shown @ NCM Bash (and pics from there) are "final design" Z06 interior;


* Z06 interiors limited to five options, as follows:
1LZ: Black, Adrenaline Red, Dark Gray;
2LZ: Black, Adrenaline Red, Dark Gray, Kalahairi;
3LZ: Black, Adrenaline Red, Dark Gray, Kalahairi, Twilight Blue (same as 60th Anniv.)
* Chrome exterior badging is optional, though Z06 badge always black chrome!
* Even with stage 2 or 3 front splitters, car will meet GM's 9% ramp angle standard (no difference in ground clearance on a ramp), but going over dips and humps, driveway entrances/exists, etc. could be a greater challenge with the stage 2/3 front splitters. Biggest challenge with stage 2/3 could be splitter damage if you go too far forward, hit an end of parking space "mini-curb!"
* Due to much greater front grill air intake requirements, front license plate bracket (required in 37 states) is not as wide as StingRay "aero plate bracket." Recommended removal of license plate/bracket when tracking the car. For the two states that require a minimum license plate height, there will be a separate bracket that fits right on the "nose," above the grill.

Sources: Tadge Juechter, Harlan Charles, Kirk Bennion and Ryan Vaughan and other GM staff @ NCM Bash.

Information accurate as of April 30, 2014 (will be subsequently changed if GM alters dates, specs, etc.)

Senior Member
18,670 Posts
Discussion Starter · #13 ·
2015 Mandatory Combinations:

If you get the StingRay Z-51 package, it will always contain/include NPP.

If you get 3LT or 3LZ interiors, it will always contain/include IWE (sueded microfiber upper interior covering).

As previously noted, if you get the 3LT or 3LZ interiors, it will always contain/include PDR (performance data recorder).

Source: Corvette Team at NCM April Bash.

Senior Member
18,670 Posts
Discussion Starter · #14 · (Edited)

Senior Member
18,670 Posts
Discussion Starter · #15 · (Edited)
Confirmation today: 2015 Ordering Timelines

Ken Fichtner (Fichtner Chev, super good guy/highly reliable) just confirmed the timelines for the 2015 ordering process (same identical ones he first shared on March 19th), as follows:

Plant start date is 8/11/14 (2015 models)

Dealers will begin consensus and know initial allocations in late June 2014 (2nd consensus cycle).

Dealers can begin submitting order requests within allocations on either July 3rd or 10th, 2014.

Final 2014 Stingrays will be produced on 8/8/14.

Senior Member
18,670 Posts
Discussion Starter · #16 ·
Now officially confirmed by Media.GM, the LT4's 650 HP & 650 TQ, as follows:

Media.GM said:
2015 Corvette Z06 Rated at 650 Horsepower!

Supercharged LT4 V-8 engine is the most powerful ever from Chevrolet: The all-new 2015 Corvette Z06 is the most powerful production car ever from General Motors and one of a few production cars available in the United States that delivers more than 600 horsepower.

The Z06’s LT4 supercharged 6.2L V-8 engine is SAE-certified at 650 horsepower (485 kW) at 6,400 rpm and 650 lb-ft of torque (881 Nm) at 3,600 rpm.

“The LT4 Small Block sets a new benchmark for power and torque at GM,” said Steve Kiefer, vice president, GM Powertrain Engineering. “The engine also puts the new Corvette Z06 on par with the most powerful supercars offered in America, while delivering performance with impeccable manners that make it suitable for daily driving.”

Compared with other supercar engines, the LT4 is a veritable fountain of low-end torque, producing 457 lb-ft (619 Nm) just off idle and 625 lb-ft (847 Nm) by only 2,800 rpm. The V-12-powered Ferrari F12 Berlinetta, for example, produces about 28 percent less torque than the Z06, despite offering about 12 percent more horsepower – and its peak torque isn’t achieved until 6,000 rpm. The LT4 maintains 90 percent of its peak torque, or 592 lb-ft (802 Nm), from 2,500 to 5,400 rpm.

The new LT4 engine eclipses the Porsche 911 Turbo S engine’s peak power levels by 90 horsepower (67 kW) and 134 lb-ft of torque (182 Nm).

“Torque is the pulling power of an engine and the LT4’s abundance of it at every rpm in the engine’s speed range helps the 2015 Corvette Z06 accelerate quicker and respond nearly instantaneously,” said Jordan Lee, chief engineer for Small Block engines. “It’s the very definition of power on demand.”

The new Z06 engine produces 40 percent more peak torque (180 lb-ft / 244 Nm) than the previous-generation’s 7.0L LS7 engine – and 7.5 percent more than the supercharged 2013 Corvette ZR1’s 604 lb-ft (819 Nm). At 3,200 rpm, the new LT4 surpasses the LS7 by 208 lb-ft of torque (252 Nm). On the horsepower side of the graph, the LT4’s 650-hp rating is 29 percent greater than the LS7’s 505 horsepower (376 kW), and 12 horses more than the ZR1’s LS9 engine.

“The new LT4 engine builds on the design strengths of our previous supercharged engine and leverages the technologies introduced on the Corvette Stingray – direct injection, cylinder deactivation and continuously variable valve timing – to take Corvette performance to an all-new plateau,” said Lee. “Our new, very compact supercharger also helps the engine make power more quickly, and perhaps more importantly, it helps produce more torque earlier in the rpm band.”

“It’s also worth mentioning that the LT4’s supercar performance numbers are achieved with an engine that is nearly the same size as the very compact LT1 engine introduced in the 2014 Corvette Stingray,” Lee said. “The power density of the LT4 makes it one of the smallest and lightest 650-hp engines in the industry.”

LT4 details

The new LT4 engine is based on the same Gen 5 small block foundation as the Corvette Stingray’s LT1 6.2L naturally aspirated engine, incorporating several unique features designed to support its higher output and the greater cylinder pressures created by forced induction, including:

Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional aluminum heads
Lightweight titanium intake valves
Machined, forged powder metal steel connecting rods for reduced reciprocating mass
High 10.0:1 compression ratio – for a forced-induction engine – enhances performance and efficiency and is enabled by direct injection
Forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures
Stainless steel exhaust manifolds and an aluminum balancer that are lighter than their LT1 counterparts
Standard dry-sump oiling system with a dual-pressure-control oil pump.
A new 1.7L supercharger spins at up to 20,000 rpm – 5,000 rpm more than the supercharger on the Corvette ZR1’s engine. The rotors are smaller in diameter, which contributes to their higher-rpm capability – and enables them to produce power-enhancing boost earlier in the rpm band. That boost is achieved more efficiently via a more direct discharge port that creates less turbulence, reducing heat and speeding airflow into the engine.

“The Small Block’s cam-in-block design heritage has always enabled very high performance and responsiveness in a small, compact package – an attribute amplified by the performance of our new supercharger’s design,” said Lee.

The LT4 is assembled at the new Performance Build Center at GM’s Bowling Green Assembly Plant and at GM’s Tonawanda engine plant in New York. It is matched with a standard seven-speed manual transmission or an all-new, paddle-shift eight-speed automatic transmission built in Toledo, Ohio.

Designed to deliver shift responses on par with the world’s best dual-clutch transmissions, it is the first automatic offered in a Z06. It also makes the Z06 one of the few cars this powerful to offer the choice of a conventional manual transmission or an eight-speed automatic.

The 2015 Corvette Z06 goes on sale in the fourth quarter of 2014.

The all-new LT4 supercharged 6.2L V-8 peak torque and horsepower figures are certified for accuracy by SAE. The LT4 maintains 90 percent of its peak torque, or 592 lb-ft (802 Nm), from 2,500 to 5,400 rpm.
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