Top end on a C7 M7 Roadster 3.42 rear
10-24-2016, 10:47 AM
#2
Race Director
I don't have any idea what the vert will top out at.
Butt....the coupe totally depends on your aero package.
With a stock car, forum members have gotten up to IIRC 187 mph at a 1-1/2 mile event with Stage 1 aero. Absolute top speed won't be too much higher than that.
I think the drag from Stage 3 will knock 7 or 8 mph off the top speed.
I imagine the vert will probably have more drag to start off with, so it will probably be a little slower than a coupe with the same aero package.
.
Butt....the coupe totally depends on your aero package.
With a stock car, forum members have gotten up to IIRC 187 mph at a 1-1/2 mile event with Stage 1 aero. Absolute top speed won't be too much higher than that.
I think the drag from Stage 3 will knock 7 or 8 mph off the top speed.
I imagine the vert will probably have more drag to start off with, so it will probably be a little slower than a coupe with the same aero package.
.
10-24-2016, 12:35 PM
#3
Team Owner
I don't have any idea what the vert will top out at.
Butt....the coupe totally depends on your aero package.
With a stock car, forum members have gotten up to IIRC 187 mph at a 1-1/2 mile event with Stage 1 aero. Absolute top speed won't be too much higher than that.
I think the drag from Stage 3 will knock 7 or 8 mph off the top speed.
I imagine the vert will probably have more drag to start off with, so it will probably be a little slower than a coupe with the same aero package.
.
Butt....the coupe totally depends on your aero package.
With a stock car, forum members have gotten up to IIRC 187 mph at a 1-1/2 mile event with Stage 1 aero. Absolute top speed won't be too much higher than that.
I think the drag from Stage 3 will knock 7 or 8 mph off the top speed.
I imagine the vert will probably have more drag to start off with, so it will probably be a little slower than a coupe with the same aero package.
.
If he has a Stingray, I would venture that the top speed of a convertible, with the top up, would be around 175-180.
Last edited by JoesC5; 10-24-2016 at 12:40 PM.
10-24-2016, 01:14 PM
#4
Race Director
Yes - you're probably right that he's talking about an LT1 powered Vette. When I think of convertible, I think of my brother-in-law's beautiful C7 Z06/Z07.
I think you're correct about an LT1 vert - maybe even 170ish max.
There is one event here at Daytona that lets us run with the windows up. I know my C6's did 5-7mph faster with the windows closed - so just having windows open creates more drag.
The convertible is not quite as smooth as the coupe, and doesn't have the "fastback" profile of the coupe. I believe the C5 Z06 that has the frc profile (fixed roof coupe - which has sort of a vert profile) wasn't quite as fast as the standard coupe profile.
.
Last edited by BEZ06; 10-24-2016 at 01:15 PM.
10-24-2016, 07:59 PM
#5
Racer
Thread Starter
Yeah - I was thinking of a Z06. I looked in the OP's profile, but he doesn't have anything in there about where he lives, info or pictures of his Vette, or anything else.
Yes - you're probably right that he's talking about an LT1 powered Vette. When I think of convertible, I think of my brother-in-law's beautiful C7 Z06/Z07.
I think you're correct about an LT1 vert - maybe even 170ish max.
There is one event here at Daytona that lets us run with the windows up. I know my C6's did 5-7mph faster with the windows closed - so just having windows open creates more drag.
The convertible is not quite as smooth as the coupe, and doesn't have the "fastback" profile of the coupe. I believe the C5 Z06 that has the frc profile (fixed roof coupe - which has sort of a vert profile) wasn't quite as fast as the standard coupe profile.
.
Yes - you're probably right that he's talking about an LT1 powered Vette. When I think of convertible, I think of my brother-in-law's beautiful C7 Z06/Z07.
I think you're correct about an LT1 vert - maybe even 170ish max.
There is one event here at Daytona that lets us run with the windows up. I know my C6's did 5-7mph faster with the windows closed - so just having windows open creates more drag.
The convertible is not quite as smooth as the coupe, and doesn't have the "fastback" profile of the coupe. I believe the C5 Z06 that has the frc profile (fixed roof coupe - which has sort of a vert profile) wasn't quite as fast as the standard coupe profile.
.
10-24-2016, 08:51 PM
#6
Race Director
LYou're gonna LUV it!!!
The Stage 1, 2, or 3 aero packages are all for the Z06. The Z51 is a little bit of upgraded track package for the Stingray, but you likely won't be tracking a convertible without a rollbar/cage.
You've still got a lot of top-down driving left this fall, so enjoy it!!
Hold off on the top speed runs until you get a little time in the car!
.
10-25-2016, 11:54 AM
#10
Miller Time Wisconsin 🍺
Member Since: Oct 2012
Location: The only thing we have to beer is beer itself 🍺
Posts: 9,603
Received 1,440 Likes
on
940 Posts
2022 C7 of the Year Finalist - Modified
C7 of the Year - Modified Finalist 2021
Finalist 2020 C7 of the Year -- Modified
2018 C7 of Year Winner
2017 C7 of Year Finalist
St. Jude Donor '13-'14-'15-'16-'17-'18-'19-'20-'21-'22
I've had my C7 M7 coupe to 175mph. That was not top speed.
What aero package? Please elaborate.
10-25-2016, 11:57 AM
#11
Le Mans Master
I've seen 180 in my '14 Z51 M7 coupe "testing & comparing" against a GTR before his front splitter folded back and he ran over it 
Safe travels, and maybe I'll see you around! I venture up that way fairly regularly for a few BBQ joints I like.
Safe travels, and maybe I'll see you around! I venture up that way fairly regularly for a few BBQ joints I like.
Last edited by Kracka; 10-25-2016 at 11:59 AM.
10-25-2016, 03:50 PM
#12
I've had my C7 M7 coupe to 175mph. That was not top speed.
Base C7 Stingray M7 no additional aero. NPP, 3LT, white/brownstone.
Click here for the details.
10-25-2016, 07:31 PM
#14
Le Mans Master
The 2005 C6 Coupe with the Z51 option LS2 (400 HP) was advertised by Chevrolet as reaching 300 KPH or 186 MPH. In the C5 and C6 sales brochures top speed was listed for each model. A 2013 Coupe (LS3) 430 HP was 190 MPH. Chevrolet has omitted top speed numbers on the C7, probably because it is less than the C6 even though it has more HP.
10-26-2016, 10:52 AM
#16
Le Mans Master
10-26-2016, 11:10 AM
#17
Team Owner
The OP asked about the top speed of the convertible, not the coupe.
The coefficient of drag on the convertible is probably around .02 higher than the coupe's.
As a comparison, GM said the top speed of the C6 Z06(coupe) was 198 MPH, but they also said the top speed of the C6 427 Convertible was 190 MPH. A drop of 8 MPH, with the same engine, body panels, transmission, tires, etc as the coupe.
The coefficient of drag on the convertible is probably around .02 higher than the coupe's.
As a comparison, GM said the top speed of the C6 Z06(coupe) was 198 MPH, but they also said the top speed of the C6 427 Convertible was 190 MPH. A drop of 8 MPH, with the same engine, body panels, transmission, tires, etc as the coupe.
Last edited by JoesC5; 10-26-2016 at 11:27 AM.
10-26-2016, 03:18 PM
#18
Le Mans Master
The OP asked about the top speed of the convertible, not the coupe.
The coefficient of drag on the convertible is probably around .02 higher than the coupe's.
As a comparison, GM said the top speed of the C6 Z06(coupe) was 198 MPH, but they also said the top speed of the C6 427 Convertible was 190 MPH. A drop of 8 MPH, with the same engine, body panels, transmission, tires, etc as the coupe.
The coefficient of drag on the convertible is probably around .02 higher than the coupe's.
As a comparison, GM said the top speed of the C6 Z06(coupe) was 198 MPH, but they also said the top speed of the C6 427 Convertible was 190 MPH. A drop of 8 MPH, with the same engine, body panels, transmission, tires, etc as the coupe.
10-26-2016, 04:31 PM
#19
Safety Car
Member Since: Nov 2007
Location: Tarpon Springs FL
Posts: 4,446
Received 308 Likes
on
198 Posts
FL Events Coordinator
A8 Z51 top up AC OFF
Last edited by obxchartercaptain; 10-26-2016 at 04:33 PM.
10-26-2016, 07:01 PM
#20
Team Owner
My C6 Z06 is at 6315 RPM at 198 MPH in 5th gear(top speed according to GM, but what do they know?).
Glad to hear that since I still have another 700 RPM until I hit the redline, my top speed must actually be 220 MPH in 5th and after I shift into 6th gear I'll be able to hit 325 MPH when I finally run out of Revs.
Just hope I don't hit a hippopotamus at that speed. Could damage my splitter.
Last edited by JoesC5; 10-26-2016 at 07:10 PM.