[Z06] "Top Speed"
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,228
Likes: 5
From: Gainesville Georgia
"Top Speed"
Hey guys,
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet. My best time at the track was 11.13 @ 130.28
I was just curious to know in your opinion what my top speed would be utilizing 6th gear? I know when stock, in 6th gear you loose top speed due to the lack of HP. I'd be curious to know how fast this thing could go with the current power she has?
I would never try to do this.... This is why I'm asking your opinions. Just so I have an idea. I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet. My best time at the track was 11.13 @ 130.28
I was just curious to know in your opinion what my top speed would be utilizing 6th gear? I know when stock, in 6th gear you loose top speed due to the lack of HP. I'd be curious to know how fast this thing could go with the current power she has?
I would never try to do this.... This is why I'm asking your opinions. Just so I have an idea. I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
Instructor
Joined: Jan 2008
Posts: 122
Likes: 0
From: Forest Park Illinois
Hey guys,
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet. My best time at the track was 11.13 @ 130.28
I was just curious to know in your opinion what my top speed would be utilizing 6th gear? I know when stock, in 6th gear you loose top speed due to the lack of HP. I'd be curious to know how fast this thing could go with the current power she has?
I would never try to do this.... This is why I'm asking your opinions. Just so I have an idea. I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet. My best time at the track was 11.13 @ 130.28
I was just curious to know in your opinion what my top speed would be utilizing 6th gear? I know when stock, in 6th gear you loose top speed due to the lack of HP. I'd be curious to know how fast this thing could go with the current power she has?
I would never try to do this.... This is why I'm asking your opinions. Just so I have an idea. I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Hey guys,
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet.
I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
I have a 2002 Z06 that is pretty nicely modded. I dyno'd 557 rwhp & 509 rwtq on a dynojet.
I wouldn't be surprised if this car could go 200 or more considering the new 450 est. rwhp Z06 does 198. My personal guess is 205 mph. Any opinions would be greatly appreciated
Thanks in advance
Now understand that this calculation is assuming the car was geared perfectly so that 557 RWHP was being put to the ground exactly when it maxed out at 232 MPH. It's very hard to gear like that unless you were just into top speed runs like the salt flat guys do.
The C6 Z06 with 450 RWHP could theoretically go about 217 MPH if it was geared perfectly to take full advantage of the RWHP. Every street car could go faster than it does if the gearing was matched perfectly with it's available RWHP for a top speed run.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,228
Likes: 5
From: Gainesville Georgia
Yeah, I know the car isn't designed to go 200+ I'm sure it probably could but I would be too scared the front end would lift off or something crazy like that. The new Z06 has zero lift unlike my Z06, the aerodynamic drag is similar @ 0.32cd with both but the C5Z does not have zero lift. As I said before, I would have to be insanely stupid to try it 
I was just curious to know if anyone with similar power has tried it or know someone who has. I wish somehow my car could be tested with the proper equipment on an airforce base or something. I'd love to know Thanks for the replies 
I was just curious to know if anyone with similar power has tried it or know someone who has. I wish somehow my car could be tested with the proper equipment on an airforce base or something. I'd love to know
Thanks for the replies
Melting Slicks
Joined: Apr 2007
Posts: 2,286
Likes: 0
From: Southwestern OH
St. Jude Donor '08
I've seen some articles about this and as I recall aerodynamics become a very critical part of the top speed equation when you get into the 200 + MPH realm.
Last edited by CJR2; Jan 27, 2008 at 09:17 PM.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Just the aerodynamic drag is a huge part of the top speed equation, as the HP required to overcome it is proportional to the velocity cubed.
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Drifting
Joined: Feb 2006
Posts: 1,282
Likes: 23
From: MD
based upon stock z06 rear wheel demensions and gear ratios. the Z would eclipse the double century mark at 5000 RPMs. from what i have found from my googling, you need about 450 rwhp to crack that mark. so, from what I have found, you need to be making at least 450 hp at 5000 to acomplish this. do you have a dyno sheet?
Last edited by VicCaerter; Jan 28, 2008 at 01:18 AM. Reason: used wrong 6th gear ratio in calculations
Burning Brakes
Joined: Mar 2007
Posts: 1,158
Likes: 1
From: St. Peters MO
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
based upon stock z06 rear wheel demensions and gear ratios. the Z would eclipse the double century mark at 4400 RPMs. from what i have found from my googling, you need about 450 rwhp to crack that mark. so, from what I have found, you need to be making at least 450 hp at 4400 to acomplish this. do you have a dyno sheet?
Advanced
Joined: Jul 2007
Posts: 59
Likes: 0
Hm...
If you max out fifth gear, and then shift into sixth, you WILL damage the transmission. Sixth gear is NOT designed to handle those speeds with that kind of power.
There have seen several threads concerning this topic. Not trying to sound rude at all; this is just what some of the forum veterans have stated.
-K
Drifting
Joined: Feb 2006
Posts: 1,282
Likes: 23
From: MD
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Burning Brakes
Joined: Sep 2001
Posts: 951
Likes: 1
From: Jacksonville Florida
The C6's 6th gear is an overdrive gear, .73 ratio if I'm not mistaken?
If you max out fifth gear, and then shift into sixth, you WILL damage the transmission. Sixth gear is NOT designed to handle those speeds with that kind of power.
There have seen several threads concerning this topic. Not trying to sound rude at all; this is just what some of the forum veterans have stated.
-K
If you max out fifth gear, and then shift into sixth, you WILL damage the transmission. Sixth gear is NOT designed to handle those speeds with that kind of power.
There have seen several threads concerning this topic. Not trying to sound rude at all; this is just what some of the forum veterans have stated.
-K
Melting Slicks
Joined: Oct 2000
Posts: 3,368
Likes: 30
From: dfw Texas
IMO unless you had 4.56s or higher.. 6th is useless for top end. Most high end C5 runs are don in 5th.. The LPE 220+ mph run was done in 5th with a 2.73 rear end. so unless you want to put in 4.56s to pull 6th... you would need to drop from the 3.42 rear end to a 3.27 or 2.73.
Thread Starter
Melting Slicks
Joined: Oct 2006
Posts: 2,228
Likes: 5
From: Gainesville Georgia
IMO unless you had 4.56s or higher.. 6th is useless for top end. Most high end C5 runs are don in 5th.. The LPE 220+ mph run was done in 5th with a 2.73 rear end. so unless you want to put in 4.56s to pull 6th... you would need to drop from the 3.42 rear end to a 3.27 or 2.73.
Safety Car
Joined: May 2006
Posts: 3,799
Likes: 1
From: Northern Virginia
St. Jude Donor '08
Above 60 mph aerodyamics (wide resistance) comes into play and as speed increases so does aerodynamic drag big time.
The Z06s (C5 & C6) are horsepower limited, meaning they don't have enough HP to push through the wall of air they are encountering at those speeds.
The faster you are going the harder and longer it takes to continue accelerating. There was a top speedshoot out in Road & Track several months back. If you can find a copy or the article on-line look at how quick they were by the 1 mile mark versus the 2 mile mark.
The Bugatti got to the 1 mile mark the fastest because of its superior traction capabilities, but the Henessey(?) prepped Viper was almost as quick at the 1 mile mark it accelerated much faster than the Bugatti between the 1 and 2 mile marks. However, both cars rate of acceleration were much slower than from zero to 1 mile.
Also, to the best of my knowledge the 6th gear meltdown is a myth. My brother asked this question and was told by RPM that it was not true. He would like to make a few high speed runs himself.
The Z06s (C5 & C6) are horsepower limited, meaning they don't have enough HP to push through the wall of air they are encountering at those speeds.
The faster you are going the harder and longer it takes to continue accelerating. There was a top speedshoot out in Road & Track several months back. If you can find a copy or the article on-line look at how quick they were by the 1 mile mark versus the 2 mile mark.
The Bugatti got to the 1 mile mark the fastest because of its superior traction capabilities, but the Henessey(?) prepped Viper was almost as quick at the 1 mile mark it accelerated much faster than the Bugatti between the 1 and 2 mile marks. However, both cars rate of acceleration were much slower than from zero to 1 mile.
Also, to the best of my knowledge the 6th gear meltdown is a myth. My brother asked this question and was told by RPM that it was not true. He would like to make a few high speed runs himself.