[Z06] top speeds?
Thread Starter
Advanced
Joined: May 2008
Posts: 82
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From: fort worth texas
top speeds?
hi just sold my c6 z about a month ago and was gonna get a c5 z06...more mods with the same or less money. i was just wondering who's been brave enough to open pandora's box and how fast did you get?
Instructor
Joined: Jul 2007
Posts: 153
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From: spring tx
maxed the speedo out, dunno, 200+ 
this vid was the closest i got to catching it, she caught me as i was coming down from it
http://www.youtube.com/watch?v=QI3DO0V-s24
this vid was the closest i got to catching it, she caught me as i was coming down from it
http://www.youtube.com/watch?v=QI3DO0V-s24
Burning Brakes
Joined: Sep 2007
Posts: 930
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From: Lawrenceville GA
Drifting
Joined: Oct 2000
Posts: 1,396
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From: Sacramento CA
need accuracy
Don't believe your speedo. Mine checked against GPS is 10 mph fast at 175mph. So get a GPS to see the real numbers. I will remember it for you so you can keep your eyes on the road. A closed road or course of course, never on a open road. 
Jeffy'
Jeffy'
Melting Slicks
Joined: Mar 2006
Posts: 3,055
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From: Jax Florida
The C5Z is geared aggressively, so it redlines 5th gear at a lower RPM than less powerful cars like the base model C5. 6th gear is OD, so you won't accelerate much unless you add alot more power (like an LS7.)
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Instructor
Joined: Jul 2007
Posts: 153
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From: spring tx
Burning Brakes
Joined: Apr 2007
Posts: 1,030
Likes: 1
From: Douglasville Ga
I have only had mine up to the 155 mark....what a rush.....in mexico of course.
I certainly hope you topped your washer fluid off...
maxed the speedo out, dunno, 200+
this vid was the closest i got to catching it, she caught me as i was coming down from it
http://www.youtube.com/watch?v=QI3DO0V-s24
this vid was the closest i got to catching it, she caught me as i was coming down from it
http://www.youtube.com/watch?v=QI3DO0V-s24
Burning Brakes
Joined: Feb 2006
Posts: 1,205
Likes: 5
From: Jupiter FL
They say that the C5s are aerodynamically limited to around 178 mph with stock HP. That's in 5th gear, because there is not enough HP to overcome wind resistance/drag with the gear ratio in 6th. Now, if you add significantly more HP, could you pull 6th gear? Maybe.
Now, would you want to go that fast? Not me. I've hit between 155 and 160 on the back straight at Pocono Raceway a couple of times. Things happen pretty quickly when you are moving that fast. I certainly would never want to go anywhere near that fast on the highway, it's just too dangerous. And the only way I would want to go faster would be someplace like the Bonneville salt flats or on one of those super-long airport runways where they do speed tests, where there is a lot of room for error and no one around to accidently pull in front of you and no pot holes, etc.
Now, would you want to go that fast? Not me. I've hit between 155 and 160 on the back straight at Pocono Raceway a couple of times. Things happen pretty quickly when you are moving that fast. I certainly would never want to go anywhere near that fast on the highway, it's just too dangerous. And the only way I would want to go faster would be someplace like the Bonneville salt flats or on one of those super-long airport runways where they do speed tests, where there is a lot of room for error and no one around to accidently pull in front of you and no pot holes, etc.
Instructor
Joined: Jul 2007
Posts: 153
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From: spring tx
mexico has nice 6 lane wide highways. all straight with no cars in sight at 3 am, not a bad deal.
ill be competing at the next texas mile too, hope i can grab 200+ in a mile, ill get a plaque!! WOOt
my engine builders promise my car will hit 200+ in the mile, so im looking foward toit
ill be competing at the next texas mile too, hope i can grab 200+ in a mile, ill get a plaque!! WOOt
my engine builders promise my car will hit 200+ in the mile, so im looking foward toit
Drifting
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Maxton Run
I ran 159.2 at the maxton mile... Standing mile run on a shorty tube header car at the time. Video is below ... you can see at the end I blip the throttle to keep it under 160... So I think without the granny shifts more aggressive starts or blip she may have done 163-4 in the mile.... but the sped def was slower to come past 150.
http://www.youtube.com/watch?v=OQygZGSeaGc
http://www.youtube.com/watch?v=OQygZGSeaGc
Instructor
Joined: Jul 2003
Posts: 182
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From: Madison MS
St. Jude Donor '08-'10
I hit 172 in 5th gear at 6500 RPM on the German Auto Bahn. That was with wife and a couple of hundred pounds of luggage. I got a picture of speedo at 162 but didn't get the 172 on film...
Instructor
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From: Plano Tx
Banned Scam/Spammer
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From: Machineguns, because I don’t compromise
I love the tacos in Mexico!!
GM claims 171 mph on a C5 Zo6.
I've hit/bumped the rev limiter in 5th gear with the speedo showing 177 in my '01.
I know that my reading is a little fast, because when I turn my cruise control on at an indicated 70 mph, the read out on the display says "cruise set 72 mph."
So I'm guessing with that ratio and the speed in 5th gear, the GM claim of 171 is about right..
I didn't try to continue in 6th
I've hit/bumped the rev limiter in 5th gear with the speedo showing 177 in my '01.
I know that my reading is a little fast, because when I turn my cruise control on at an indicated 70 mph, the read out on the display says "cruise set 72 mph."
So I'm guessing with that ratio and the speed in 5th gear, the GM claim of 171 is about right..
I didn't try to continue in 6th
