MeefZ06

Let me be the first to say I'm quite uninformed. So, this post may seem to some as a "you've got to be kidding me" post. But for those of you w/ the patience and time (I know you're bored to tears at work also hehe), I'd appreciate your replies.

Background: I'm new on the board- first post actually. I have a black 97 Z28; will graduate college in May and aspire to own a silver Z06 some day (approx 2 years from now actually).

Now the questions: specifically what separates a Z06 from a regular C5? Here's what I know (or think I know). Appearance: badge, rear ducts, no verts; Performance: Suspension upgrades, Exhaust upgrade. I'm sure there are others, but I dunno them.

Also, if the Z06 has improved exhaust, then why put aftermarket exhaust on a Z06? Same with suspension, assuming people change this too (haven't seen as many posts on that though).

I will undoubtedly ask more dumb questions in the future, but I'll leave it at this for now. Thanks for the input,
Jay

OatBoy

im no z06 buff but the there's always hp to be gained with stock exhaust systems no matter how good, more specifically the engine is an ls6 rather than an ls1 and has numerous upgrades, i think the head and cam and intake are all different than ls1 but not positive. the suspension and clutch are upgraded. hopefully someone who really knows their stuff will chime in.

Bman

Welcome!! :cheers:

Other that what you said
Body type the z only comes in a hard top (not coupe)
Wheels
Exhaust
6 speed manual (only)
motor (LS6) (Coupes,Verts and FRC's have a LS1)

Im sure im forgetting somthing!

Anyway Welcome aboard!! :cheers: :thumbs:

tpocock

engine is 405hp.
performance front brake pads.
painted red brake calipers
functional rear brake air vents.
performance suspension.
non-run flat tires that are larger than the other models.
fixed shaft radio antenna only.
few additional options (really only the memory package, electrochromic mirrors, and body side molding)
cannot order the multi-disc CD player (though it can be installed with the purchase and installation of the cable).

Shylor

Most of your questions can be answered at the Chevy site, http://www.chevrolet.com/corvette/index.html

But most of what you have is correct. Some put an aftermarket exhaust on because they want a different sound and improved horsepower. And some change the suspension because they want to improve it. Remember GM still had to make a compromise between performance and cost. While the Z06 is a faster car than the Coupe or Vert, it doesn't mean GM used the best equipment.

Also, the Z06 does not come with a power passenger seat, Telescoping steering wheel, run flats or Twilight Sentinal. The radio antenna is a fixed mast. It is a lighter car with thinner front and back glass. It does have better brakes and F1 Supercar tires.

KCvetteowner

Jay,

I'm a new owner.....

To answer your question quickly - the Z06 is simply built to race...
- more power
- less weight
- more even weight distribution front/back (tranny is located in the rear of the car)
- more stopping power and vents to cool the brakes
- fewer options to minimize weight
- no spare tire for example - also no tire pressure monitoring system (???why??)
- Titanium exhaust eliminated a significant amount of weight vs. stainless steel on the other C5s.
- only 6-speed tranny is available - it's built stronger and geared differently than the other C5s.
- hundreds of other things.....

Aftermarket exhaust because like stereos, you can't ever have one that is too loud...Many people are trying to get a lower tone as well.

I would suggest you buy a Z06 owners video on eBay (probably will be sold with an owners manual). The 1hr video will give you some insight into the car. It even explains what you should do to your Z06 to set it up for racing such as adding 1qt of oil. The Z06 is capable of 1G lateral excelleration which results in the oil getting pinned against the sides of the engine so it can't properly flow through the motor. It also discusses lowering the Z06 for racing and gives you an overview of the design considerations and weight reductions made in the car...

LTC Z06

From: http://www.z06vette.com/02.php


New for 2002 Z06

LS6 engine (Z06 model) receives 20 horsepower increase, to 405 hp, and receives 15 foot pounds more torque for a total of 400 lbs. ft. of torque
Pre-cat deletion
Revised rear shock valving
Aluminum front and rear stabilizer bar links
Aluminum transmission cooler case
Magnesium wheels no longer available (coupe and convertible)
Z06 wheels are now cast aluminum, not forged aluminum
Head-Up Display (HUD) now standard
Cam/Valve/Spring change
Electron Blue exterior color

Model Lineup Engine Transmission
Coupe 5.7-liter V8 w/ 4-speed automatic (S) 350 hp (LS1) 6-speed manual (O)
Convertible 5.7-liter V8 w/ 4-speed automatic (S) 350 hp (LS1) 6-speed manual (O)
Z06e 5.7-liter V8 w/ 6-speed manual 405 hp (LS6)


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For Release: June 20, 2001
CHEVROLET BUILDS THE QUICKEST Z06 CORVETTE EVER, AT 405 HP, AND REFINES COUPE AND CONVERTIBLE
DETROIT - For nearly 50 years, the Corvette has had a special place in America's garage. Crafted from a precise blend of power, performance, style and comfort, Corvette's success has been based on a willingness to embrace advancing technology while remaining true to its heritage. Today's Corvette exemplifies this philosophy like no other.

More Power
Last year's introduction of the Z06 Corvette, based on the former hardtop model and the legendary 1960s Z06 option package, is aimed at true performance enthusiasts at the upper end of the high-performance market. And now, an extra boost of 20 hp, to 405, makes Z06 the quickest production Corvette ever.

This upgrade to the LS6 engine's output is the result of new hollow stem valves, a higher-lift camshaft, a low restriction mass air flow (MAF) sensor and a new low restriction air cleaner design. Eliminating the PUP converter from the exhaust system enables better flow of spent gasses and reduces vehicle weight, without compromising Corvette's NLEV (National Low Emission Vehicle) status.

Suspension Upgrades
The Z06-specific FE4 High-Performance suspension system features a larger front stabilizer bar, a stiffer rear leaf spring and specific camber settings - all calibrated for maximum control during high-speed operation. The 2002 model year Z06 also has new rear shock valving for a more controlled ride.

Although retaining the same design and color finish, the unique aluminum Z06 wheels are now produced using a cast rather than a forged process. The magnesium wheel option for Coupes and Convertibles is no longer available.

Maximum Agility
The foundation of Corvette's agile handling is hydroformed frame rails. Its four-wheel independent front suspension features cast aluminum upper and lower A-arms. The Z06 and models equipped with the available Z51 package now have aluminum front stabilizer bar links for lighter weight. A transverse leaf spring system is used for the independent rear suspension.

All Corvettes have the second-generation Active Handling system as standard equipment. The system features dynamic rear brake proportioning to prevent rear wheel lockup; rear brake stability control to assist the driver in maintaining control under light braking and high acceleration conditions; integral traction control calibrated to allow drivers to experience the vehicle's power and handling while maintaining control over excessive wheelspin. It also has an on/off switch and a "Competitive Mode" which allows the driver to disengage the traction control feature without giving up Active Handling's other benefits.

Additional Refinements
Now standard on Z06, the Corvette's Head-Up Display (HUD) projects vehicle speed and many other gauges digitally on the windshield ahead of the steering wheel, enabling drivers to keep their eyes on the road. HUD remains an option on Coupes and Convertibles.

For 2002, the transmission cooler case is constructed of lightweight cast aluminum, replacing the previous stainless steel design.

Corvette's exterior color palette adds Electron Blue, replacing Navy Blue Metallic previously offered on Coupes and Convertibles. Electron Blue also takes the place of Speedway White as one of five choices on the Z06.

2002 CHEVROLET CORVETTE SPECIFICATIONS
Overview


Model: Chevrolet Corvette: Coupe, Convertible, Z06 (hardtop)
Body Style/driveline/configuration: Two-door hatchback coupe, convertible and fixed-roof coupe, rear-drive, front-engine
Body material: Composite
EPA vehicle class: Two seater
Manufacturing facility: Bowling Green, Kentucky
Key competitors: Audi TT, BMW Z3, Dodge Viper, Porsche Boxster and Boxster S, Porsche 911

Engines
5.7L (LS1) V8 5.7L (LS6) V8
V8 Application: STD on Coupe, Convertible STD on Z06
Type: 5.7-liter OHV
Block Material: Cast aluminum
Displacement (cu in/cc): 350 / 5665
Bore x stroke (in/mm): 3.90 x 3.62 / 99.0 x 92.0
Cylinder head material: Cast aluminum
Valvetrain: Overhead valve, two valves per cylinder
Fuel delivery: SFI
Compression ratio: 10.1:1 10.5:1
Horsepower/kilowatts: 350 / 261 @ 5600 rpm 405 / 302 @ 6000 rpm
Torque (lb-ft/Nm) 375 / 508 @4400 (manual)
360 / 489 @4000 (automatic) 400 / 542 @ 4800 rpm
Recommended Fuel 91 Octane
Maximum Engine Speed 6000 rpm 6500 rpm
Emission control system: Catalytic converter AIR
EPA Estimated Fuel economy (mpg city/hwy/comb) 19/28/23 (manual transmission on coupe and convertible
18/25/21 (automatic transmission on coupe and convertible) 19/28/23 (manual transmission Z06)

Transmissions
4-speed automatic 6-Speed manual 6-Speed manual
Application: Std. on coupe and conv. Opt. on coupe Std. on Z06 only.
1st Gear 3.06 2.66 2.97
2nd Gear 1.63 1.78 2.07
3rd Gear 1.00 1.30 1.43
4th Gear 0.70 1.00 1.00
5th Gear -- 0.74 0.84
6th Gear -- 0.50 0.56
Reverse 2.29 2.90 3.28
Final drive 2.73 (std) / 3.15 (opt) 3.42 3.42

Chassis/Suspension
Front: Short/long arm (SLA) double wishbone, cast aluminum upper & lower control arms, transverse-mounted composite leaf spring, monotube shock absorber
Rear: Short/long arm (SLA) double wishbone, cast aluminum upper & lower control arms, transverse-mounted composite leaf spring, monotube shock absorber
Stabilizer Bar diameter (mm/in): Std. - 19.1 / .75, F45: - 19.1 / .75, Z51: - 21.7 / .85, FE4: - 21.7 / .85
Traction control: Electronic Traction Control, Active Handling
Steering type: Speed sensitive power-assisted rack-and-pinion
Steering ratio: 16.1:1
Turns lock-to-lock: 2.66
Turning circle (feet / meters): 40.2 / 12.1

Brakes
Type: Power-assisted disc with ABS, front and rear
Front: 12.6 x 1.26-inch (325 x 32-mm)
Rear: 11.8 x 1.0-inch (305 x 6-mm)
Swept Area: Front-263 sq. in., 1696 sq. cm
Rear-158 sq. in., 1018 sq. cm

Wheels
Coupe and Convertible: Z06
Front: 17 X 8.5 17 X 9.5
Rear: 18 X 9.5 18 X 10.5
Type: Cast Aluminum (Std) Forged Aluminum, High Polish (Opt.) Cast Spun Aluminum
Tires
Front: P245/45ZR-17 P265/40ZR-17
Rear: P275/40ZR-18 P295/35ZR-18
Type: Goodyear Eagle F1 GS, extended mobility Goodyear Eagle F1 SC, Asymmetric Tread

Exterior Dimensions
Coupe Convertible Z06
Wheelbase (in/mm): 104.5 / 2655.5
Overall length (in/mm): 179.7 / 4565.6
Width (in/mm): 73.6 / 1869.4
Height (in/mm): 47.7/ 1211.5 47.8 / 1214.7 47.7 / 1211.5
Front Track (in/mm): 61.9 / 1572.3 61.9 / 1572.3 62.4 / 1584.5
Rear Track (in/mm): 62.0 / 1574.5 62.0 / 1574.5 62.6 / 1589.5
Curb Weight (lbs/kg): 3246 / 1458 3248 / 1456 3118 / 1414
Weight Distribution (f/r): 51 / 49 53 / 47
Interior Dimensions
Seating capacity: 2
Head room, front (in/mm): 37.9 / 963 37.8 / 960
Shoulder room, front (in/mm): 55.3 / 1405
Hip room, front (in/mm): 54.2 / 1377
Capacities
Cargo volume (cu ft/liters): 24.8 / 702 13.9 / 394 13.3 / 377
Fuel tank capacity (gals/liters): 18.5 / 70.0
Engine oil w/ filter (qts/liters): 6.5 / 6.15
Engine coolant (qts/liters): 11.5 / 10.9 (automatic) 11.8 / 11.2 (manual)

CORVETTE TESTING DESIGNED TO RETAIN "AMERICA'S FAVORITE SPORTS CAR" ICON STATUS
WARREN, Mich. - Chevrolet Corvette has been called "America's favorite sports car" for its ability to deliver proven power and performance in a production model. At Chevrolet, we take great pride in Corvette's status and work diligently to ensure it will remain a source of automotive awe and inspiration for years to come. That is why Corvette is subjected to the same general durability testing as all other General Motors vehicles. Then, it's tested even further, with three additional tests - 250 miles of autocross, 24 hours on the racetrack and top speed at wide-open throttle - to ensure that America's sports car is ready for high-performance use.

Autocross
The autocross portion of the testing includes 250 miles on an autocross course. It takes about five fuel tank loads to complete the 250 miles, with a total vehicle inspection at every fuel stop. Instrumentation monitors everything, from oil pressure to transmission temperature. This test is a precursor to the 24 hours on a race track.

24 Hours on the Racetrack
After the autocross test, Corvette spends 24 hours at competition speeds on a road course.

"It's really the equivalent of 24 individual sprint races, each lasting one hour," explains Mike Neal, Corvette ride and handling chassis development. "It takes about an hour at track speed to consume a tank of fuel. The car then comes in; we check and top off fluids, replace brakes and tires, download our instrumentation and send the car out again. We do this until the car has completed 24 hours on the track."

The 2.2-mile road course used to validate the '02 Z06 consists of a 120-mph straightaway, 90-mph sweeping curves and 40-mph hairpins. The drivers make 12 shifts per lap and brake 10 times per lap. "Compared to the 2001 Z06, the 2002 model is half a second faster around our test track," adds Neal.

Throughout the testing, equipment monitors and records 30 channels of thermal information from critical components and fluids. In addition to the temperature readings, other pertinent data is collected and analyzed, including, oil pressure, engine rpm, vehicle speed, lateral acceleration, as well as fore and aft acceleration.

"For the Corvette, this additional testing is essential in validating the robustness of the vehicle for racing application," explains Neal. "In the case of the 2002 Z06, the track-testing phase was key in helping us determine that a new clutch design was needed."

The clutch of the 2001 Z06 had already been enhanced to deal with the increased power of the LS6 (over the LS1); with the additional power of the 2002 LS6, a new clutch design was developed to ensure long life and good performance.

"Our 24 hours of at racing speeds is an invaluable complement to our normal durability testing," says Dave Hill, Performance Cars vehicle line executive and Corvette chief engineer. "It's one test that is severe enough to give Corvette the robustness our owners expect. It's what makes Corvette stand out among the competition."

Top Speed Wide-Open Throttle
To simulate high-speed, autobahn conditions, Corvette is subjected to a wide-open throttle test on our five-mile circle track at the Milford Proving Grounds in Milford, Michigan. Starting with a full tank of gas, the car is driven flat-out at its 171-mph top speed until the fuel tank is empty - approximately 30 minutes. The test validates the car's ability to withstand extreme thermal loads reliably.

Validating Performance
"It's important to keep in mind that with Corvette - and especially with the Z06 - buyers are purchasing a vehicle that has been thoroughly tested under all conditions, "emphasizes Dave Hill. "Our rigorous testing ensures that the Corvette can be put through its paces on the race track and still serve as reliable transportation in everyday situations. This testing further adds to Corvette's legend as America's favorite sports car."

2002 Z06 CORVETTE IMPROVES ON PERFECTION
WARREN, Mich. - To say that the 2001 Chevrolet Z06 Corvette was launched to wide-ranging acclaim is an understatement, the Z06 has won the hearts of Corvette aficionados everywhere. For many, the 2001 Z06 represented as close to perfection as has ever been achieved in a sports car. It has been received with unprecedented praise for its ability to deliver performance, agility, and control - all wrapped in a visually stunning package. For 2002, Chevrolet engineers have provided a new definition of perfection.

Corvette has been synonymous with performance for nearly 50 years. Proving that you can never have too much of a good thing, GM engineers extracted an additional 20 horsepower from the LS6 engine that debuted in 2001. For 2002, the LS6 delivers an awe-inspiring 405 horsepower at 6,000 rpm.

"We could have chosen to remain satisfied with our achievements for 2001, instead, we set our sights on breaking the 400-horsepower barrier," said Dave Hill, Performance Cars vehicle line executive and Corvette chief engineer. "At 405 horsepower, the LS6 will match the highest peak power level of the legendary 5.7-liter DOHC LT5, which powered the ZR1 Corvette."

More Torque = Better Performance
"When you hear customers talking about wanting more power, what they really mean is that they want more torque. It' s torque that gets you going, whether launching from a standstill, or accelerating out of a corner. At 385, last year's Z06 was already in an elite class. For 2002, we've upped the ante with another 15 pounds-feet of torque, for a total of 400 pounds-feet at 4,800 rpm. The result is one that must be experienced to be appreciated," said Hill.

The Z06 will continue to be outfitted with the unique six-speed manual transmission for 2002. It will enable skilled drivers to achieve 0-60 mph times of 3.9 seconds and to cover a quarter mile in 12.4 seconds at 116 mph. By comparison, the 2001 powertrain combination achieved 0-60 mph in 4.0 seconds and the quarter mile in 12.6 seconds at 114 mph.

LS6 Clutch Improvements
To withstand the greater torque output of the new engine, the LS6 clutch was redesigned. Clamp load has been increased seven percent and durability has been augmented by the following enhancements:

The clutch-driven disc was redesigned, with the flange plate thickness increased by 20 percent - from 5 mm to 6 mm . The damper springs were redesigned to increase wind-up rate, from 33 Newton-meter degrees to 35 Newton-meter degrees . Premium alloy steel wire is now used for the damper springs.

These changes ensure long life and good performance for the LS6 clutch.

World-Class Agility and Handling
"While the 2002 Z06 is the quickest Vette to date, the Corvette team never lost sight of the fact that the Z06 is a total performance package. With this goal in mind, the suspension has been improved to keep the Z06 the well balanced sports car that it is, and the standard against which all other sports cars are measured," said Hill.

The valving of the Z06's rear dampers was also revised, allowing for smoother, more efficient transfer of the additional horsepower and torque to the pavement.

"Revising the damping allowed us to improve the track performance of the Z06, as well as its everyday ride quality," said Mike Neal, Corvette ride and handling development engineer.

In addition to generating more power, Corvette engineers also scrutinized every possible means to reduce vehicle mass, which in turn results in improved vehicle handling. Their efforts resulted in:

Cast aluminum front stabilizer links (versus rolled rod steel links), resulting in a 0.2 kg (0.44 lbs.) weight saving
Cast-spun aluminum wheels (versus forged aluminum), for a total mass savings of 0.6 kg (1.3 pounds)
These are further enhancements to the world-class FE4 suspension system that debuted in 2001.

A Solid Foundation
"The 2002 Z06 Corvette is the complete package, a vehicle that can be driven at the limit with supreme confidence. It's a true driver' s car, designed to provide the driver with the information and feedback required for enthusiastic driving," said Hill.

This latest Z06 builds upon the solid foundation established by the previous model-year offering, one that had already raised performance to a whole new level. The 2001 Z06 introduced a standard Second-Generation Active Handling system, providing a great deal of assistance to the Corvette driver and an added level of safety to occupants.

The 2001 Corvette coupe, convertible and Z06 models broke new ground in the areas of refinement, with better noise isolation, better idle quality, reduced maintenance costs and improved fuel economy.

Greater emphasis on performance is further enabled with a standard Head-Up Display (HUD) for 2002 Z06 models. It provides critical vehicle information - including tachometer, vehicle speed, oil pressure, coolant temperature and fuel gauges, among others - promoting a "hands on the wheel, eyes on the road," philosophy.

"We realize that the Z06 is not for everyone. But, for the extreme performance enthusiasts, the race-bred 2002 Z06 provides them with a vehicle that challenges the threshold of performance and handling, with absolutely no compromises," stated Tadge Juechter, Performance Cars assistant chief engineer. "The 2002 Z06 is a total performance package!"

VETTE FANS RECEIVE HISTORIC POWER BOOST
PONTIAC, Mich. - The 2002 5.7-liter Overhead Valve (OHV) LS6 engine for the ZO6 Corvette will be rated at 405 horsepower. The increase of 20 horsepower equates to 71 horsepower per liter in this 5665 cc engine - the highest output yet in a Gen III small-block.

The new LS6 V8 delivers 405 horsepower at 6000 rpm and 400 lb-ft of torque at 4800 rpm. To achieve this additional power the engine received modifications including a revised air cleaner housing, low restriction Mass Air Flow (MAF) sensor, lightweight valves, higher lift camshaft and an exhaust alteration.

The component modifications that enable the additional 20 horsepower and 15 lb-ft of torque (compared to 2001) all focus on getting more air into and out of the engine. Increasing the volume of air in and out ultimately creates more power.

Air first enters through the air cleaner housing. The new air box opening to the air cleaner increases by approximately 6.65 square inches (43 cm2). This additional Volume contributes to more horsepower.

The new MAF sensor no longer has pre-sensor grid work known as air channels. Induction air thus flows less restricted through the mass air flow sensor and into the intake manifold.

Gases flowing into and out of the combustion chamber pass by new hollow stem valves. The stems of the exhaust valves are filled with a liquid sodium alloy. Since the exhaust valves operate at a much higher temperature than the intake valves, the liquid alloy enables better transference of heat from the exhaust valves to the valve guides and then to the engine coolant. The valves reduce valvetrain mass by approximately 368 grams. This lighter weight allows the valves to keep contact with the cam at higher speeds.

The new cam profile is the greatest contributor for the increased power. The new profile allows the intake and exhaust valves to open .7 mm further. This key change enables more air to be pumped in and out, which equates to more power. Each camshaft is induction hardened and straightened to an accuracy of ten microns to ensure it spins true in the engine. All 16 lobes are inspected using opto-electrical technology with submicron level precision.

For 2002, the ZO6 will eliminate the use of dual pup catalytic converters found immediately downstream from the exhaust manifolds. Eliminating these converters allows for increased exhaust flow out of the engine. The under floor catalytic converters have been modified to make up for the pup converters and still meet NLEV emissions standards.

With 405 horsepower the LS6 will match the highest peak power level of the legendary 5.7-liter DOHC LT5 which powered the ZR1 Corvette from 1990-1995. For OHV V8 fans and the engineering community this is a significant milestone.

The LS6 was made possible by using the Gen III architecture introduced in the 1997 LS1. This new small-block variation included features such as a deep skirt aluminum block, cross-bolted mains, internally balanced crank, electronic throttle control and coil-near-plug ignition. The Gen III small block retained the simplicity of OHV design and built in appropriate advanced engine technologies.

Commenting on the new power level Assistant Chief Engineer John Juriga said: "With the advent of the '02 OHV LS6, GM Powertrain continues to prove its ability to deliver power and performance in a small package and exceed customer expectations."

SAM WINEGARDEN INTERVIEW ON THE 2002 LS6
Sam Winegarden, chief engineer for GM Powertrain's small block team, was recently interviewed on the launch of the 2002 LS6. The LS6 is the 5.7L V8 engine for the ZO6 Corvette which will break the 400 horsepower mark. Sam has been chief engineer for the small block program for over three years.

1. Can you describe what it's like to work on the small block program?

If you talk about imaging and brands and that kind of thing there's nothing longer living, better recognized than the small block Chevy. When you come to work here your working on an icon. You're also working on the heart and soul of the Corvette and almost every truck we make. Virtually half of GM's North American volume and a large part of its profits centers around the small block. It's fun but it's pretty sobering. You're in charge of a legend.

We've been really energized around here with the introduction of the new LS6. Producing horsepower is always exciting and generates a tremendous amount of enthusiasm. The ability to match the LT5 certainly generated a lot of enthusiasm for the team, I mean it's another step, another level of performance in the history of the small block and the team was pretty enthusiastic about going after that. It was a lot of fun.

2. With 405 HP in the LS6 you've surpassed a lot of the muscle car era's gross power levels [1968 L79 327 - 350 HP, 1969 L46 350 - 350 gross horsepower, 1970 LT1 350 - 370 gross horsepower] with these kinds of numbers - that's definitely an achievement...

John Juriga (assistant chief engineer) and his team have done a really nice job with what you could call the ruthless pursuit of horsepower. The small block team has done an excellent job of bringing every bit of horsepower they could out of it. To say the least, the accomplishment is thrilling to be a part of.

3. You've achieved comparable power to the legendary LT5 with an OHV design. Any comments on this historic achievement and its impact on the industry?

It's just one more step in a long and very storied and successful history of the small block. The team is just continuing to perform at an outstanding pace. From an industry perspective I think one thing it tells you is that there is more than one way you can design an engine to achieve the power. The conventional wisdom out there will tell you that you need to have a four valve overhead cam arrangement and that is just simply not the case. You can make it work either way and I think John and the team have shown that. From an industry perspective it just tells you that the push rod small block has a bright future, and there's more where that came from.

4. Do you think this power boost will resonate well with the Vette fans?

Absolutely. 20 HP doesn't ring like it's a really big number but when you actually drive the vehicle, to quote Dave (Dave Hill, Corvette Chief Engineer and VLE), "it makes the car really come alive."

5. Did you meet the Corvette team's requirement for power and torque levels?

Yes, actually we exceeded them a little bit. The objective was 400 we got 405.

6. Having been the Chief Engineer for GM's Premium V engine family [which includes the Cadillac's Northstar and Oldsmobile's 4.0L and 3.5L engines] for 10 years, what type of engineering processes are carrying over into the small block?

There's a lot of synergy in several areas, one of them is our Bill of Design. Bill of Design is basically a guideline of best engineering practices established over our collective life to get the best possible design. Now granted one family of engine is a four valve and one is a two valve push rod, ones overhead cam and one's cam-in-block. Many elements of the Bill of Design on things like cylinder head design, block design and piston design carrys over regardless of a particular architecture, so there' s a lot of similarities there. One of my favorite examples is the structure on the bottom end of both the Vette and the Premium V. While there are two different solutions there, one's a deep skirt with a six bolt arrangement and one's a bed plate, both of them are just outstanding from bottom end structure and both followed our Bill of Design. The small block is probably the most robust lower end I've ever seen, bullet proof. The team did just a superb job there.

7. What do you think the guiding philosophy should be in the development of engines for the Corvette?

Well the first thing, the Corvette has to be the best performance value on the road,period - so of course you have to concentrate on the power. The other thing that you have to do is integrate the engine into the vehicle. If you just make raw power and don't get it integrated into the vehicle correctly then it's not going to be very pleasing and frankly the vehicle won't be very exciting. Working with the Corvette team has been a pretty rewarding experience because together we've been able not only to make that kind of legendary performance number but package it in a vehicle that's actually very refined for the level of performance that you're getting. The overriding principle is: It's got to be done in a quality manner, making the horsepower then breaking engines is not a good plan.

8. For '02 the LS6 increased 20 HP. Why didn't you just give that last year when the LS6 was introduced?

To be bluntly honest with you, we weren't quite ready. There were some valvetrain issues we needed to work on. Reducing the mass of the valves and working with the aggressive ramp rates on the cam were challenging. There were other challenges obviously but I think the valvetrain was the trickiest to get solved and balanced. We're not going to do this thing if we don't have a quality solution in hand. Not having resolved those issues in the final weeks before '01 production we agreed to do it as a two step process, '01 and '02. So it was purely a case of when we were ready. We're still not selling wine here before it's time.

9. Did you ever consider expanding the bore or stroke ever?

Some of the learning from the power development in this program is destined to show up in future model years.

10. The rpm limit of 6600 rpm is impressive for this pushrod V8. Why is the LS1 (in the base Corvette) fuel cutoff at 6200?

We've reached a threshold around 6200 rpm where we needed to reduce the weight of the valves to avoid fluttering. When you have a heavier valvetrain one of the things you trade away is some of the higher rpm capabilities and you end up having to limit the speed, thus the lower speed of the LS1. It's a trade off of how much power you want to make versus how much fuel economy and/or how smooth and quiet you want it to be and that's a balance we struck with Dave's team.

11. The LS6 beauty covers are red, distinguishing it from the LS1. Was there any discussion on visually distinguishing the 2002 from the 2001 LS6?

No. However the engine is getting credit on the exterior of the car. There will be a badge with "405" integrated into the ZO6 logo.

12. What is the volume projection for the 2002 LS6?

We will start at 20 percent of production at Bowling Green, and see what the demand is for this special model. Either way, the St. Catharines engine facility will be locked in and produce what we need.

13. Did removing the pup converters create more emissions?

No, we took care of that by improving the under-floor converter. Converter technologies is one of the good technical stories unfolding across all GM Powertrain that we were able to take advantage of. It obviously helped us with our power by cutting the back pressure in the exhaust system which is always a good thing to do.

14. Will this version of the LS6 still operate fine with regular fuel? Is premium fuel still recommended?

Yes, premium is still recommended and yes, it operates just fine with regular - the ESC [Electronic Spark Control] system adapts to it. There is of course a slight degradation in performance. The two areas where you'll lose a little performance is at low speed heavy load and then at top end. Pulling the spark back will reduce the torque a little. Driving around town you won't really notice. On the track yes, but around town just use a little more pedal because there's a lot there.

15. What's your favorite year Corvette?

The '02 Z06. If you can't get out of that car with a grin on your face you' re in the wrong business.

16. Then what's your second favorite?

The 1963 Stingray. Historically, that's the one I like best.

Copyright 2002 - Z06Vette.com - Photo Credits: General Motors Inc.

and welcom :)

Steve Theodore

Don't forget that the MN12 (transmission specific to Z06) ratios are actually more aggressive than the non Z06 transmission, although I believe the final drive gearing is still 3.42. :)

I'm just a Supra owner though...I might be wrong! :crazy:

Shylor

"- more even weight distribution front/back (tranny is located in the rear of the car)"

All the C5's have the tranny in rear.


"- no spare tire for example - also no tire pressure monitoring system (???why??)"

No monitoring system to save on weight. Yet they included the compressor and liquid tire bottle.


"- only 6-speed tranny is available - it's built stronger and geared differently than the other C5s."

Not so sure it's built stronger, just geared differently.





[Modified by Shylor, 2:04 PM 7/17/2003]

1FunZ06

"also no tire pressure monitoring system (???why??)"

Because the Z06 does not have runflat tires. Instead, the tire repair/inflator kit. You inject some "fix a flat" type stuff into the tire and inflate to get you to a repair shop. This "stuff" would ruin the tire pressure monitoring device in the tire, hence no tire pressure monitors.

I recently bought the valve tip tire pressure indicators for $10 a set at Autozone. They are green above the set point then turn yellow up to 4 psi below and are fully red at 10 psi. Best $10 I ever spent protecting about $1100 worth of tires.
:hurray:

Shylor

Why buy these when it's just as easy to use the air pressure gauge included in your car.

OatBoy

cpt, i think thats the longest post ever.

MeefZ06

Wow. lots of info. Thanks for all the replies.

So do the majority of Z06's get modded like Camaros with the "Intake/Exhaust" route, or are there different things that most Z06 owners aim for first, since the exhaust/(intake?) are already pretty good.

Also, here's a supercharger question.
Were I to SC a Z06, would I be best off doing the "send it to Lingenfelter and let them do their magic" thing, or getting a different brand that is equal in performance but cheaper. From what I recall, Lingenfelter Z06s run an extra 8k minimum for the most basic Ling package. Any thoughts?
-Jay

stingray454

I would say the majority of Z06's are stock. But the most popular mods are intake and exhaust. There are many different intakes for the car, because most of the intakes are the same for the C5 and the Z06. Some intakes can pick up to 20 additional hp over the stock unit.

For exhaust: headers, X-pipe, and cat-back systems are all popular mods, and can pick up another 20-35 HP combined. So combined with the intake, you could conceivably pick up another 50hp total at the crank with ECM tuning, or about 25-35hp at the wheels.

That's debatable. Lingenfelter certainly has a good reputation, and that's part of what you are paying for. It depends what kind of risk appetite you have, and how much you are willing to work on your own car if something goes wrong. Lingelfter is much more of a 'turn key' package - send them your car and a hefty check, and your car comes back supercharged.

Personally, I would go with the Vortex or ATI supercharger and install it myself. I'm a motor head, I'm skilled with a wrench, and I like working on cars, so I would rather do it myself. But that's me.

1FunZ06

<<Why buy these when it's just as easy to use the air pressure gauge included in your car.>>

I wash my car a lot more frequently (every week) than I typically check the air pressure in tires. In fact, last weekend I noticed one turned red. Got down to 20 psi. I had apparently ran over a nail in the neighborhood.... lots of home construction going on.

So the $10 for the pressure indicators work for ME. I guess the tire gauge works for YOU. Hope you don't run over any nails and ruin your tire before you check the pressure with your gauge.

By the way, glad you FINALLY got a Z. Never thought you would. I'd ask if you were enjoying it, but I'm sure you are!
:hurray: :hurray:

96VIPERGTS

I agree, that was one long SOB!!!

03QuicksilverZ06

Hey Meef!

Welcome to the forum :cheers:


I had the same aspirations as you, I owned a silver z28 vert(see sig pic of trade in day ), I also wanted a silver z06. I bought mine in March 03. I can tell you it is the best money i've ever spent. The differences between your z28 and the Z06 is huge.. I loved the f-body, but this z06 is amazing. I would go for it if I were you.. I have NO regrets :thumbs: As for your questions, its hard to add to the above info, although I have read that with the z06 m12 tranny the first 2 gears are equivelent to 3.93 geared rears..

jackmott

Id say if you just want a massive HP supercharged drag best get a camaro or firebird, it will be a cheaper toy to mess with.

you are already contemplating expensive, risky power modifcations on a car that already has enough power to make near full utilization of massive tires in gears 1 and 2.

=)
but to each his own!