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Old 01-17-2006, 12:36 PM   #1
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Default Whats the different between 2001 and 2002 and later Z06's

Ok, this question comes up frequently, so in a nutshell here are the major differences between 2001, and 2002-2004 Z06's. 2MuchRiceMakesMeSick for compiling it.

differences between 2001 & 2002 & up:
1. The LS6 engine standard in the Z06 increased from 385 to 405 horsepower. Torque increased from 385 to 400 lb-ft.
2. Front fender badges for Z06 models included the 405 HP designation.
3. LS6 exhaust back pressure was reduced by 16%
4. Cam shaft was redesigned resulting in increased lift and a 5% increase in air flow
5. Valve spring material composition was changed to increase seat load by 14%.
6. LS6 intake and exhaust valves were a new, lighter design.
7. The valve train weight was reduced by 0.81 pounds, which improved valve seating at high rpm.
8.Airflow over the LS6 MAF sensor was increased by removing grid work
9. MAF software was re calibrated
10. LS6 air cleaner housing had a larger intake
11. Wheels looked the same BUT they were cast spun instead of forged for a weight savings of 1.3 pounds per car
12. rear shock valving was changed
13. Improved clutch
14. Thicker front anti-sway bar
15. New front brake pads
16. HUD was standard (HUD was not avaliable in 2001 cars)
17. 2004 introduced a new fuel system which carries over into the new C6.

The technical details on 2001 vs 2002 can be found here.

http://www.idavette.net/hib/02ls6/index.htm
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Old 01-17-2006, 09:55 PM   #2
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thanks J-rod...
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Old 01-24-2006, 09:54 AM   #3
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cool, what do most non z06, ls1 c5s dyno bone stock? so is one z06 any faster than the other assuming 2002-2003 models? how much faster is the 405hp one vs 385hp one?
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Old 02-19-2006, 11:00 AM   #4
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Good info. Thanks
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Old 02-19-2006, 12:33 PM   #5
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Here is a really good site for detailed info for each model year plus performance tests.

http://corvetteactioncenter.com/specs/z06/index.html
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Old 03-20-2006, 04:28 PM   #6
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basically it's the higher lift cam in '02 that made the bump in power, .525 to .550 lift and some more duration
the '05 LS2 uses the same specs as the '01 Z06 cam(no reluctor on the cam though, cam sensor reads off the sprocket up front)
electron blue replaced white in '02, machine silver replaced quicksilver in '04
FFS fuel system was mid year '03(pumps on top of tanks)
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Old 08-31-2006, 08:55 AM   #7
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I am not positive...but didn't the '04 Z06 receive a carbon fiber hood from the factory?? Can someone validate this?
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Old 08-31-2006, 02:25 PM   #8
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Quote:
Originally Posted by BRIAN98Z28
I am not positive...but didn't the '04 Z06 receive a carbon fiber hood from the factory?? Can someone validate this?
Only Z06s with the Z16 option got the carbon fiber hood if I remember correctly.
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Old 09-21-2006, 09:18 AM   #9
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Quote:
Originally Posted by BRIAN98Z28
I am not positive...but didn't the '04 Z06 receive a carbon fiber hood from the factory?? Can someone validate this?
Yup, that's correct.

http://www.corvetteactioncenter.com/...06/2004cf.html

http://www.corvetteactioncenter.com/...6/z16hood.html
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Old 12-22-2006, 12:43 PM   #10
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Quote:
Originally Posted by J-Rod
13. Improved clutch
Can anyone elborate on this? Specifics? Diaphragm pressure difference? Disc material?
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Old 12-22-2006, 08:52 PM   #11
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Off of the Corvette Forums:

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.
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Old 12-26-2006, 05:39 PM   #12
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Great info. Thanks for your time!!
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Old 07-02-2007, 05:10 AM   #13
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Quote:
Originally Posted by Jersey_TA
Only Z06s with the Z16 option got the carbon fiber hood if I remember correctly.
,
,
And 2004 C.E.
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Old 07-03-2007, 05:11 PM   #14
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Quote:
Originally Posted by ramairfreak98ss
cool, what do most non z06, ls1 c5s dyno bone stock? so is one z06 any faster than the other assuming 2002-2003 models? how much faster is the 405hp one vs 385hp one?
my 2001 C5 dyno was 310 rwhp and 320 rwtq i have B&B bullets and a volant intake bt thats it
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Old 12-10-2007, 11:47 PM   #15
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I heard that the final year for c5 zo6 vettes got upgraded piston rings?......or seomthing like that
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Old 03-10-2008, 07:22 PM   #16
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Can someone tell me the exact specs on a 01 Z06 cam???
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Old 06-11-2008, 02:54 PM   #17
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Dang that's quite a bit!
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Old 07-30-2008, 04:15 PM   #18
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Cool Z06 Specs ?

Quote:
Originally Posted by VENOMIZED03 View Post
Can someone tell me the exact specs on a 01 Z06 cam???
GM show the specs as: 207/217.....525/.525 lift.......116 LSA.
I have been thinking about getting one for my Daily Driver.
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Old 01-23-2009, 04:08 PM   #19
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Thanks for the info, very helpful, i'll also check out the suggested pages.
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Old 03-06-2009, 07:59 PM   #20
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hmmm
thanks 2003 just for me
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Old 03-06-2009, 07:59 PM
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