h3mpking

I agree..Would take a very long way to get there. We will probably never know.

Lavender

Z07 equipped C7Z top speed is 186 mph. I've done it in mine few times. It kind of hits a brick wall after 140mph. Stage 1 convertible Z06 with the top down did 202mph on the autobanh. Theres a video of it somewhere @ Youtube.

AzDave47

GM said aero 3 was 186, I think Aero1 was 192 or 195. C6 ZR1 was GM claimed 205.

New Ford GT claims 216.

Bullet Tooth

I will have much more information on this very topic in the morning. I have stage 3 aero and am too lazy to remove it.

JoesC5

C5 coupe was 176, C5 Z06 was 172, C6 coupe was 186(LS2) and 190(LS3).

C6 Z06 was 198, 427 Convertible was 190 and ZR1 was 205.

Firemedic301

194 mph Sun Valley wide open stock 2015 Z06

Firemedic301

2016 Z07 and it in NO WAY hits a brick wall at 140. In Mexico I had a roll of 193 mph.

Getyup

You lucky guy!! I would kill for an open road like that😎

Getyup

You lucky guy!! I would kill for an open road like that😎

lordofwar

caddy ad claims 200mph out of their 4dr sedan with 640hp

Kappa

He doesn't mean a literal brick wall but relative to other cars, the C7Z is kind of slow past 140mph due to drag especially with the Stage 3 aero. You can check the 0-150 times of competitors for proof.

Not like most people are up in that range often anyway.

h3mpking

That looked fun.. looks like she's done for sure at 193/194.

Adam Silver05

Johnny Bohmer has the NASA landing strip for early June. There are a few spots left. I was going to go but have a schedule conflict. It isn't cheap but you have 3 miles total. I think up to 2.2 miles for go and .8 miles for whoa. There is a stock C7 Z06 Callaway that did 204 in Mojave in 1.5 miles. I think 2.2 is enough to top the C7 Z06 out.

Always Red Dave

Read that also in a couple of magazines.

Lavender

Did you have the full Z07 aero and the wicker in its upper most position?

NSC5

And I believe that is a true claim. The CTS V isn't designed to produce as much downforce at speed as the Z06 even without its stage 2 or 3 aero so it will be faster in a straight line. It will also be faster at exiting the track if it tries to match speed with a Z06 through a high speed curve

Warp Factor

Doesn't every production line engine come out a little different? Or is that a thing of the past?

And wouldn't a lot depend on factors which might cause the engine to reduce power, like pulling timing if detonation is sensed? It's hard to believe that this engine could operate for 1 or 2 minutes straight at full power, without becoming more susceptible to detonation. Aren't some people logging timing being pulled in just quarter mile passes?

I haven't read of any standardized protocol that's used for determining top speed, and it seems that things like air temperature, air density, fuel octane, and even tire pressure might make significant differences.

AzDave47

Most all GM engines are SAE rated HP so the variances are very small. At ~ 200 MPH 5-10 HP won't make much difference, like maybe 1/2 MPH max in a C7Z.

Most events that time for speed do it with a set of laser beams separated by some distance so it is an "average" of that speed over that distance, not a speed at one point. Yes, weather conditions make a difference. Mojave is at 2600' and the density altitude is frequently about 3000'. I'll be doing a standing mile event in a couple weeks where the altitude is 6400'. While the air resistance is less at altitude, the N/A engines make much less power. On FI cars it depends on how the control system is set up on how much power is lost.

Gary '09 C6

awesome open road run...

johnglenntwo