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The new ZR-1 page 1
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The new ZR-1 page 1 - January 20, 2008, 09:15 AM

2009 Chevrolet Corvette ZR1 - Auto Shows

1 | 2 | 3 Head for the fallout shelter: The beastly Corvette ZR1 is gonna wreak some havoc.


BY MIKE AUSTIN, ERIK JOHNSON, AND ALISA PRIDDLE, PHOTOGRAPHY BY JEFFREY G. RUSSELL AND THE MANUFACTURER December 2007
The ZR1 is the most expensive and most powerful production Corvette in history, with a price of about 100 grand ($110,000 for the loaded 4LZ trim level) and an estimated 620 horsepower at 6500 rpm and 600 pound-feet of torque at 4000 rpm from its supercharged LS9 6.2-liter V-8.
It is the first factory-built Corvette to feature forced induction, and it will also be the first Corvette to top 200 mph off the showroom floor. The idea that such a Vette could exist is certifiably bonkers.
And yet here it is. Thank you, Rick Wagoner. Thank you, Bob Lutz. And thank you, Corvette vehicle lead engineer Tom Wallace.

// The Heart of the Beast

Spearheading the myriad mutations needed to turn a run-of-the-mill Corvette into a ZR1 is, of course, that blown hunk of aluminum residing between the front wheels. Contrary to what you might think, the LS9 isnít based on the Z06ís 7.0-liter LS7 but rather the base Vetteís 6.2-liter LS3 (the LS3 has 76-percent carryover parts) with which it shares a 4.06-inch bore and a 3.62-inch stroke. The LS7ís cylinder walls were deemed too thin to reliably handle the extra grunt of the supercharger. The LS9 has been validated to 150,000 hours and had no piston, rod, or crank failure in 6800 cumulative dyno hours. The hand-assembled engines come from GMís Performance Build Center in Wixom, Michigan, and each one is hot-tested before it goes out the door.
The all-new blower is provided by Eaton and is the sixth in its series of Roots-type superchargers. This Twin Vortices Series rides between the cylinder banks, making max boost of 10.5 psi, and Chevy claims an increase in efficiency and noise reduction over past superchargers. An air-to-liquid intercooler sits on top of the supercharger. By lowering the engine inside the car, engineers were able to avoid the telltale hood bulge required for most superchargers. As a result, hood height only increases an inch, although there is little space between the outside of the hood and the engine.
Other less noticeable changes were made under the hood, too. The LS9ís heads are made of an alloy meant to handle higher temperatures, and they sit on four-layer steel gaskets rather than on the two-layer ones found in the LS3. The intake ports have swirl wings, which increase the efficiency of the combustion process but unfortunately also cramp airflow. The superchargerís forced air, however, mitigates the airflow problem, according to Corvette engineers.


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January 20, 2008, 09:16 AM

The LS9 uses a forged steel crank and pistons and has a lower 9.1:1 compression ratio compared with the 10.7:1 ratio of the LS3. The connecting rods are titanium, like the LS7’s. The LS3 and the LS9 have identical valve diameters, but the blown engine gets titanium intake and sodium-filled steel exhaust valves.

// The Rest of the Voodoo

As the LS9 does its work, its many, many ponies invade the transmission, where they encounter a beefed-up six-speed Tremec unit with closer ratios than the one found in the Z06. However, first gear will still be good for 60 mph, ensuring insane performance stats. A dual-plate clutch offers enough feel and modulation, according to Chevy, to make launches a snap. We expect 0 to 60 in 3.5 seconds or better and the quarter-mile in 11.0 seconds.
The spring rates have been softened from those of the Z06, and the ZR1 will get as standard equipment the second generation of Delphi’s auto-reactive magnetic shocks tuned to produce a docile ride around town in a car that required a new speedometer to 220 mph. The footwear is fat. The ZR1 gets 285/30-19s up front and 335/25-20s at the rear. By comparison, the Z06 uses 275/35-18s in front and 325/30-19s in the rear. As GM vice-chairman and head of global product development Bob Lutz puts it, “It’s wonderfully easy to drive, but once in it, Clark Kent turns into Superman.”
The Corvette uses the same Brembo carbon-ceramic brakes as the ones found on the million-dollar Bugatti Veyron supercar. Vented and cross-drilled discs measure a whopping 15.5 inches at the front and an even 15 at the back. The front calipers utilize six pistons and the rears four. Essentially, everything was brought up to the level needed to handle the rush of power the car can create, says Lutz.
The ZR1 will likely weigh 150 more pounds than the roughly 3200-pound Z06, despite the liberal use of carbon fiber for the hood—which has a see-through panel in the middle for an excellent view of the top of the intercooler cover—front fenders, sill extensions, front splitter, and roof. The car has eight major panels of carbon fiber compared with six made of other materials. GM says the ZR1 will be first to offer clear-coat carbon-fiber exterior panels designed to last the life of the car. The chemical additive in the clear-coat costs more than $60,000 a gallon, officials say.


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January 20, 2008, 09:17 AM

The weight gain was inevitable, given all the extra hardware under the hood. “It’s literally like being fired out of a slingshot in a time-warp continuum,” Lutz says, but with stability enhancement to help keep the tail straight when nailing the throttle while exiting a corner.

// Production starts in July, and the ZR1 will be on sale in August or September. GM can build about 2000 ZR1s a year with a choice of seven colors. Each car will have a unique VIN that incorporates the sequential build number, which should please collectors.
The Vette to End All Vettes—Literally

Since its launch, the Z06 has always been “the best dollar-for-dollar sports car on the planet,” but that’s kind of like being called the “best pound-for-pound fighter” in boxing. You might be very good, but there are still bigger, stronger opponents out there who’ll knock you flat on your rear. In the case of the Ferrari 599–baiting ZR1, however, it doesn’t look as though we need any qualifiers whatsoever—it’s going to rock, plain and simple.
And with the fear that high-performance vehicles like this may be legislated out of existence in the future because they can’t meet emissions standards, we plan to enjoy every minute we can, just in case.


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January 20, 2008, 09:52 AM

eh, i'd still take this over a beefed up cavalier any day.



Official GTR Specifications
24 Oct 2007
Engine
VR38DETT twin-turbocharged 3.8-liter V6.
480 hp @ 6,800 rpm. 430 lb-ft torque @ 3,200 - 5,200 rpm.
Dual overhead camshafts with variable intake-valve timing.
Cast aluminum cylinder block with high-endurance/low-friction plasma-sprayed bores.
IHI twin turbochargers, one per cylinder bank.
Pressurized lubrication system with thermostatically controlled cooling.

Drivetrain
ATTESA ET-S All-Wheel Drive (AWD) with independent rear-mounted transaxle integrating transmission, differential and AWD transfer case.
Rigid, lightweight carbon-composite driveshaft between engine and transaxle.
Electronic traction control plus 1.5-way mechanically locking rear differential.
Vehicle Dynamics Control (VDC-R) with three driver-selectable settings: Normal (for daily driving, controls brakes and engine output), R-Mode (for ultimate performance, utilizes AWD torque distribution for additional vehicle stability) and Off (driver does not want the help of the system).
Hill Start Assist prevents rollback when starting on an incline. DisclaimerVDC-R cannot prevent accidents due to abrupt steering, carelessness, or dangerous driving techniques. Always drive safely.

Transmission
6-speed Dual Clutch Transmission with three driver-selectable modes: Normal (for maximum smoothness and efficiency), Snow (for gentler starting and shifting on slippery surfaces), and R mode (for maximum performance with fastest shifts).
Fully automatic shifting or full sequential manual control via gearshift or steering wheel-mounted paddle shifters.
Dual clutch design changes gears in less than 0.5 second (0.2 second in R mode).
Downshift Rev Matching (DRM).
Predictive pre-shift control (in R mode) based on throttle position, vehicle speed, braking and other information.

Wheels and Tires
20 x 9.5" (front) and 20 x 10.5" (rear) super-lightweight forged-aluminum wheels with Gunmetal Gray finish.
Exclusively developed nitrogen-filled Bridgestone� RE070A high-capacity run-flat summer tires, 255/40R20 front and 285/35R20 rear.
Tire Pressure Monitoring System (TPMS).
Optional exclusively developed nitrogen-filled Dunlop� run-flat all-season tires, 255/40R20 front and 285/35R20 rear (includes Bright Silver wheels).

Brakes
Brembo 4-wheel disc brakes with 4-wheel Antilock Braking System (ABS), Brake Assist, Electronic Brakeforce Distribution and Preview Braking.
Two-piece floating-rotor 15-inch front and rear discs with diamond-pattern internal ventilation.
6-piston front/4-piston rear monoblock calipers.

Steering
Rack-and-pinion steering with vehicle-speed-sensitive power assist.
2.6 steering-wheel turns lock-to-lock.

Suspension
4-wheel independent suspension with Bilstein� DampTronic system with three driver-selectable modes: Normal/Sport (for automatic electronic control of damping), Comfort (for maximum ride comfort), and R mode (engages maximum damping rate for high-performance cornering).
Electronically controlled variable-rate shock absorbers. High-accuracy progressive-rate coil springs.
Front double-wishbone/rear multi-link configuration with aluminum members and rigid aluminum subframes.
Hollow front and rear stabilizer bars.

Body/Chassis
Exclusive Premium Midship platform with jig-welded hybrid unibody.
Aluminum hood, trunk and door skins. Die-cast aluminum door structures.
Carbon-reinforced front crossmember/radiator support.

Exterior
Wide-beam headlights with High Intensity Discharge (HID) low beams.
LED taillights and brake lights.
Dual heated power mirrors.
Flush-mounted aluminum door handles.
Body-color rear spoiler with integrated center high-mounted stop light.
UV-reducing tinted glass. Audio/Navigation/Performance Monitor
Digital Bose� audio system with AM/FM/in-dash 6-CD changer and 11 speakers including dual subwoofers.
HDD Music Box system, including hard drive with 9.4 GB for audio storage.
MP3, WMA and DVD audio capable. In-dash Compact Flash card reader.
HDD-based GPS navigation with touch screen.
Driver-configurable performance monitor, developed with Sony� Polyphony, with graphical readouts of vehicle data and driving data displayed on a total of 11 screens.
7-inch WVGA high-resolution color-LCD display for audio, navigation and performance monitor.

Interior
Automatic Temperature Control (ATC).
Electronic analog instrument cluster with multi-function trip computer and digital gear indicator.
Power front windows with one-touch auto-up/down feature.
Intelligent Key system with pushbutton start. Power door locks.
Cruise control.
Tilt/telescoping steering column.
Bluetooth� Hands-free phone system with voice recognition. Seating/Appointments
Leather upholstered front seats with perforated Alcantara inserts.
8-way power front seats with entry/exit switch for rear-seat passengers.
Driver-shaped bucket seat.
Dual individual rear seats.
Heated front seats.
Leather-wrapped steering wheel and shift knob.
Drilled aluminum pedals. Safety/Security
Nissan Advanced Air Bag System (AABS) with dual-stage supplemental front air bags, seat belt sensors and occupant-classification sensor.
Driver and front-passenger side-impact supplemental air bags and roof-mounted curtain supplemental air bags.
Front seat belts with pretensioners and load limiters.
Nissan Vehicle Immobilizer System.
Vehicle Security System.


The East Coast Kid


Quote:
Originally Posted by Rossi
This is America I can shit where I want. FREEDOM!!!

Last edited by eck226; January 20, 2008 at 10:03 AM..
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January 20, 2008, 09:59 AM

Thats bad ass. What is it?


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January 20, 2008, 10:03 AM

The new Nissan GTR, if you have a spare $85,000 laying around (actually $70, but i've heard there is a $15k mark up) you can place one on order for a June release.

Specs added in post above


The East Coast Kid


Quote:
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January 20, 2008, 11:38 AM

Quote:
Originally Posted by eck226
eh, i'd still take this over a beefed up cavalier any day.
beefed up cavalier...right.

Interestingly enough the GT-R is about 2 seconds quicker around Nuremburg than the current LS7 based ZO6 but so should a AWD car be.

The ZR1 should be faster than the ZO6 but at least that margin.
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January 20, 2008, 11:52 AM

ZR-1 #3 sold for $1 million on Barret-Jackson last night.
http://www.barrett-jackson.com/appli...LotNumber=1316


'08 MARRC Expert Racer of the Year
2009 #3 Combined Overall Championship

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January 20, 2008, 04:31 PM

Quote:
Originally Posted by BlackHatch
beefed up cavalier...right.

Interestingly enough the GT-R is about 2 seconds quicker around Nuremburg than the current LS7 based ZO6 but so should a AWD car be.

The ZR1 should be faster than the ZO6 but at least that margin.
i'm just sayin, sit in a cavalier, then sit in any other GM vehicle, they all have the same interiors, maybe some fake wood grain or leather here and there, but for the most part the same.


The East Coast Kid


Quote:
Originally Posted by Rossi
This is America I can shit where I want. FREEDOM!!!
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January 20, 2008, 05:49 PM

Quote:
Originally Posted by SVbadguy
ZR-1 #3 sold for $1 million on Barret-Jackson last night.
http://www.barrett-jackson.com/appli...LotNumber=1316


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January 20, 2008, 05:55 PM

2 too many wheels


Chris
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January 21, 2008, 12:57 AM

Quote:
Originally Posted by eck226
i'm just sayin, sit in a cavalier, then sit in any other GM vehicle, they all have the same interiors, maybe some fake wood grain or leather here and there, but for the most part the same.
Go sit in a new CTS and tell me that.

Also, would you rather have 200 more HP and much more potential of some nicer interior parts...?

Go sit in a new ZO6...the finish quality is nice but not without a few squeaks and rattles but from a car that rides that tight...that is pretty good.
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