C6 at Bonneville
Racer
Joined: May 2005
Posts: 362
Likes: 47
Top Speed
Interesting, no limiter on the C6.
The GTO's have a 162 mph limiter.
I'm sure the issue is gearing on the A4, with the manual you have a greater selection of gears to stay at peak hp.
I would like to see what a Hypertech or Diablo tuner would do for top speed.
Avalonandl
The GTO's have a 162 mph limiter.
I'm sure the issue is gearing on the A4, with the manual you have a greater selection of gears to stay at peak hp.
I would like to see what a Hypertech or Diablo tuner would do for top speed.
Avalonandl
Melting Slicks
Joined: Nov 2004
Posts: 2,514
Likes: 1
From: Orwigsburg Pa.
Originally Posted by C6_NITPICKER
I reached 180... 183MPH a couple of weeks ago, I am positive that I could have gotten higher had my wife not started screaming next to me 
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Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
Originally Posted by C6_NITPICKER
I reached 180... 183MPH a couple of weeks ago, I am positive that I could have gotten higher had my wife not started screaming next to me .
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Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
Originally Posted by C6_NITPICKER
I reached 180... 183MPH a couple of weeks ago, I am positive that I could have gotten higher had my wife not started screaming next to me .
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Intermediate
Joined: Oct 2005
Posts: 46
Likes: 0
Originally Posted by aaaaa
The car might have caught some air and flipped or I might have lost control due to a malfunction (tire, hose, panic 
) Aside from that I can't imagine anything going wrong 
) Aside from that I can't imagine anything going wrong i was moreso refering to local authority figures is this legal or a big ticket
Instructor
Joined: Feb 2005
Posts: 100
Likes: 0
From: San Jose California
I have the Z51 MN6. And I do not live anywhere near Utah. I live in San Jose, Ca. I was taking a wicked 10800 mile journey to NF, Canada and back again. I enjoyed it but it will not happen again at least not that distance. The cool thing is I was able to get some really cool shots of the car in some really interesting locations!
Melting Slicks
Joined: Nov 2004
Posts: 2,514
Likes: 1
From: Orwigsburg Pa.
Originally Posted by C6_NITPICKER
I have the Z51 MN6. And I do not live anywhere near Utah. I live in San Jose, Ca. I was taking a wicked 10800 mile journey to NF, Canada and back again. I enjoyed it but it will not happen again at least not that distance. The cool thing is I was able to get some really cool shots of the car in some really interesting locations!
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Advanced
Joined: Apr 2005
Posts: 87
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I've gotten 184 on radar in both directions and had I felt a little more, well I hope I had a little more but it was an honest 184. Speedo was reading 186 in the HUD but the radar was calibrated with tuning forks and was dead on.
Team Owner
Joined: Feb 2005
Posts: 41,332
Likes: 616
From: FL
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Originally Posted by aaaaa
Two years ago I took my C5 out to the flats for some top speed runs and got 175. It was stock at the time, mn6. With my C6 now 3 weeks old and 1200 miles I figured it was time to see what it would do. The C6 has 50 more horses but it's an automatic. How would it compare?
The temp. was 55. The salt was flooded, looked like a shallow lake so (like last time) I used the 3 mile long access road that dead ends at the raceway. I went up and down the road twice looking for debris, pot holes etc. Some people were there and I had to wait for them to leave. I started at the entrance to the road so I'd be heading toward the dead end ( no chance of surprises). I made two runs. The first run topped out at 168. The second run was 170. It took about a mile to get to 160 and another mile to reach 170. I kept the pedal on the floor but the HUD showed 170,169,170,169 etc.
Now to do some mods.
The temp. was 55. The salt was flooded, looked like a shallow lake so (like last time) I used the 3 mile long access road that dead ends at the raceway. I went up and down the road twice looking for debris, pot holes etc. Some people were there and I had to wait for them to leave. I started at the entrance to the road so I'd be heading toward the dead end ( no chance of surprises). I made two runs. The first run topped out at 168. The second run was 170. It took about a mile to get to 160 and another mile to reach 170. I kept the pedal on the floor but the HUD showed 170,169,170,169 etc.
Now to do some mods.
Melting Slicks
Joined: Nov 2004
Posts: 2,514
Likes: 1
From: Orwigsburg Pa.
Originally Posted by aaaaa
170 is depressing? I admit I'd have been happier with 186 but the car is still new and an auto. Not many cars will do 170 and even fewer are comfortable at that speed.
170 is far from chopped liver. With a few more miles you may hit 175---but it really becomes a meaningless bragging right for 99% plus owners. The 2.73 05 and the 2.56 06 may hit closer to the 175/180 range but then again it becomes rediculous for most of us.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Originally Posted by Datawiz
That's VERY depressing news.
Living in Park City (7050' at my house), I can tell you that just driving down to SLC makes a HUGE difference in power and torque.
-Tom
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
Originally Posted by Tom400CFI
Don't forget folks; this is at 4200' elevation. He's losing 12.6% of his hp and tq due to that elevation. That is a significant 50 hp and 50 lb-ft.
Living in Park City (7050' at my house), I can tell you that just driving down to SLC makes a HUGE difference in power and torque.
-Tom
Living in Park City (7050' at my house), I can tell you that just driving down to SLC makes a HUGE difference in power and torque.
-Tom
Yeah! What he said! Thanks for reminding me Tom.
Drifting
Joined: May 2003
Posts: 1,260
Likes: 1
From: South Carolina
Yeah that altitude is killing your power. BUT it is also making the air less dense so its easier for the car to move through the air, i would think that would matter. Kind of like there are more homeruns in Colorado at the Rockies stadium. I had my c6 up to 176 in TX but ran out of road it was full of luggage and had 470 lbs of people in it. The z51 mn6 is VERY capable of 186.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Originally Posted by Yogivette
Yeah that altitude is killing your power. BUT it is also making the air less dense so its easier for the car to move through the air, i would think that would matter.
If you drove in Death Valley on a 50*F day during a high presure front, you'd have a very high atmospheric presure, but your engine's extra power and torque would over come the added reisitance, and the car would run faster.
You do see less wind "resistance" at higher elevation, but you lose more power than you "gain" in less wind resistance.
-Tom
Thread Starter
Burning Brakes
Joined: Mar 2003
Posts: 1,030
Likes: 0
From: Pittsburgh PA
The z51 mn6 is VERY capable of 186.[/QUOTE]
How can you say that if you haven't done it? My car does 170(indicated) under the conditions that I ran it that day. Could it go faster with different conditions, maybe, maybe slower. Until you've done it you don't know. There are so many posts on here about coulda, woulda, shoulda. Tell me you did it or you saw it. I'd find that easier to believe.
How can you say that if you haven't done it? My car does 170(indicated) under the conditions that I ran it that day. Could it go faster with different conditions, maybe, maybe slower. Until you've done it you don't know. There are so many posts on here about coulda, woulda, shoulda. Tell me you did it or you saw it. I'd find that easier to believe.
4th Gear
Joined: Oct 2005
Posts: 4
Likes: 0
Originally Posted by aaaaa
The z51 mn6 is VERY capable of 186.
Something that hasn't been brought up to any extent in this discussion is rear-end ratio.
The MN Z51 is turning 5600 at 186 with a 3.42 rear-end. You said you were turning 4400 at 170, that would be 4840 at 187. I would think that if you used a higher rear-end gear, you would come a lot closer to 186. I don't have the figures but an engine turning 4400 is putting out a lot less horsepower than the same engine would at 5600. Claimed peak HP is at 6000.
My 06 Z51 A6 with the standard 2.56 rear-end would be turning 4825 at 186, if I were to put in a 3.15 rear-end I would be turning 5930 at 186. Very close to the 6000 peak horsepower RPM. With that gearing I would think the A6 would give the MN6 a run for its money given like conditions.