Convertible Top Speed?

ArmanSS · 06-21-2019, 05:50 AM

It is my understanding that the convertible SS has a top speed of 155mph. I want to understand why. The tires that came with it have the same speed rating as the coupe which goes 180. Is GM worried about the top flying off past speeds of 155?

wnta1ss · 06-21-2019, 06:06 AM

Quote:

Originally Posted by ArmanSS

It is my understanding that the convertible SS has a top speed of 155mph. I want to understand why. The tires that came with it have the same speed rating as the coupe which goes 180. Is GM worried about the top flying off past speeds of 155?

They place a limiter in the ECU at 155 in the 'vert SS instead of 180 like the coupe SS. As far as why, (just guessing here) it might be that they consider the car to NOT be intended for race track use. I say that because they left off the auxiliary coolers and the brake cooling ducts that are used on the coupe SS. I have no idea if the soft top has any issues with integrity at somewhat higher speeds.

Cmax · 06-21-2019, 06:52 AM

LOL..... I opened this thread thinking it was a question of how long it took for the top to go up, or down.
I had the answer too. I did side by side driveway race with my neighbor who has a 2016 mustang vert. Granted, his isn’t a GT, but the hp and torque of his top is the same as a GT.
I beat his lil pony by 1.67 seconds.... and I did it from my porch, with my remote control, while multitasking with a lager in my other hand.

ArmanSS · 06-21-2019, 07:00 AM

Quote:

Originally Posted by wnta1ss

They place a limiter in the ECU at 155 in the 'vert SS instead of 180 like the coupe SS. As far as why, (just guessing here) it might be that they consider the car to NOT be intended for race track use. I say that because they left off the auxiliary coolers and the brake cooling ducts that are used on the coupe SS. I have no idea if the soft top has any issues with integrity at somewhat higher speeds.

Man the vert gets screwed on the cooling system? That’s a bummer

driven2exceSS · 06-21-2019, 07:02 AM

Quote:

Originally Posted by Cmax

LOL..... I opened this thread thinking it was a question of how long it took for the top to go up, or down.
I had the answer too. I did side by side driveway race with my neighbor who has a 2016 mustang vert. Granted, his isn’t a GT, but the hp and torque of his top is the same as a GT.
I beat his lil pony by 1.67 seconds.... and I did it from my porch, with my remote control, while multitasking with a lager in my other hand.

lmfao

Silverado57 · 06-21-2019, 07:05 AM

Quote:

Originally Posted by Cmax

LOL..... I opened this thread thinking it was a question of how long it took for the top to go up, or down.
I had the answer too. I did side by side driveway race with my neighbor who has a 2016 mustang vert. Granted, his isn’t a GT, but the hp and torque of his top is the same as a GT.
I beat his lil pony by 1.67 seconds.... and I did it from my porch, with my remote control, while multitasking with a lager in my other hand.

Funny stuff. Thanks for the laugh.

shinbone · 06-21-2019, 01:33 PM

Quote:

Originally Posted by ArmanSS

It is my understanding that the convertible SS has a top speed of 155mph. I want to understand why. The tires that came with it have the same speed rating as the coupe which goes 180. Is GM worried about the top flying off past speeds of 155?

Anyone know if this can be tuned out?

ArmanSS · 06-21-2019, 03:24 PM

Quote:

Originally Posted by shinbone

Anyone know if this can be tuned out?

It can be, I had a guy quote me $250 at a tune shop to do it. But I want to make sure going those speeds, given the right conditions, is “safe”. I don’t want the top to fly off or anything else to happen.

Lafourche1 · 06-21-2019, 03:55 PM

I think that you should consider that any convertible is inherently less rigid than any fixed roof car of the same type. There are differences even on the ZL1 convertible in that it lacks the eDIF. The lack of cooling would seem to indicate that the car was not intended for the track. If it were, there would likely be a roll bar / roll cage as part of the package (most tracks / HPDE events, etc. require something of this sort).

Consider the forces at play at speeds of ~155MPH. That is Cat5 hurricane winds. Those blow down towns.

ArmanSS · 06-21-2019, 04:13 PM

Quote:

Originally Posted by Lafourche1

I think that you should consider that any convertible is inherently less rigid than any fixed roof car of the same type. There are differences even on the ZL1 convertible in that it lacks the eDIF. The lack of cooling would seem to indicate that the car was not intended for the track. If it were, there would likely be a roll bar / roll cage as part of the package (most tracks / HPDE events, etc. require something of this sort).

Consider the forces at play at speeds of ~155MPH. That is Cat5 hurricane winds. Those blow down towns.

Very true, but the ZL1 convertible is limited to 198mph just like the coupe.

Lafourche1 · 06-21-2019, 04:19 PM

Quote:

Originally Posted by ArmanSS

Very true, but the ZL1 convertible is limited to 198mph just like the coupe.

I can't speak to the convertible, but the coupe is not limited to 198MPH. In fact it has been clocked at the VW test facility at 202MPH (somewhat wind aided). The average speed of runs in both directions was 198MPH and is usually accepted as the top speed of the car.

The 2017 Chevrolet Camaro ZL1 is Capable of 200+ MPH

https://www.motortrend.com/news/the-...le-of-200-mph/

Convertible
<LI class="quick-specs-table-item g-fw">
Top Speed:
185 mph (Est.)

https://www.topspeed.com/cars/chevro...-ar172126.html

ArmanSS · 06-21-2019, 04:28 PM

Quote:

Originally Posted by Lafourche1

I can't speak to the convertible, but the coupe is not limited to 198MPH. In fact it has been clocked at the VW test facility at 202MPH (somewhat wind aided). The average speed of runs in both directions was 198MPH and is usually accepted as the top speed of the car.

The 2017 Chevrolet Camaro ZL1 is Capable of 200+ MPH

https://www.motortrend.com/news/the-...le-of-200-mph/

Convertible
<LI class="quick-specs-table-item g-fw">
Top Speed:
185 mph (Est.)

https://www.topspeed.com/cars/chevro...-ar172126.html

I gotcha. I wish I did my research a little further before buying it. I could have almost gotten a ZL1 for what I paid for my vert...and it can't even go over 155

Gunkk · 06-21-2019, 06:44 PM

Quote:

Originally Posted by Lafourche1

I think that you should consider that any convertible is inherently less rigid than any fixed roof car of the same type. There are differences even on the ZL1 convertible in that it lacks the eDIF. The lack of cooling would seem to indicate that the car was not intended for the track. If it were, there would likely be a roll bar / roll cage as part of the package (most tracks / HPDE events, etc. require something of this sort).

Consider the forces at play at speeds of ~155MPH. That is Cat5 hurricane winds. Those blow down towns.

The ZL1 vert has all the same cooling as the Z coupe. I say this to clarify the above just in case someone takes the bold out of context...

ArmanSS · 06-21-2019, 08:37 PM

I did some research and the SS convertible has all the same options as the coupe in regards to the cooling system aside from the aux coolant cooler and the brake ducts. That doesn’t seam like enough to justify why it would be limited to 25mph slower than the coupe. But maybe in GMs mind they thought that was enough.

06-21-2019, 05:50 AM	#1
ArmanSS Drives: '18 Camaro 2SS VERT Join Date: Jun 2019 Location: Jacksonville, FL Posts: 121	Convertible Top Speed? It is my understanding that the convertible SS has a top speed of 155mph. I want to understand why. The tires that came with it have the same speed rating as the coupe which goes 180. Is GM worried about the top flying off past speeds of 155?

06-21-2019, 03:55 PM	#9
Lafourche1 Drives: 2019 CLA 450 Mercedes Join Date: May 2016 Location: South Louisiana Posts: 1,107	I think that you should consider that any convertible is inherently less rigid than any fixed roof car of the same type. There are differences even on the ZL1 convertible in that it lacks the eDIF. The lack of cooling would seem to indicate that the car was not intended for the track. If it were, there would likely be a roll bar / roll cage as part of the package (most tracks / HPDE events, etc. require something of this sort). Consider the forces at play at speeds of ~155MPH. That is Cat5 hurricane winds. Those blow down towns. __________________ 2019 Lunar Blue Metallic Mercedes CLS 450 2021 C43 AMG Mercedes Coupe Metallic Cardinal Red 2014 Lincoln MKT EcoBoost (The Bus)

06-21-2019, 06:52 AM	#3
Cmax Drives: 2017 Camaro 2SS FIFTY convertible Join Date: Sep 2014 Location: Cincinnati Posts: 366	LOL..... I opened this thread thinking it was a question of how long it took for the top to go up, or down. I had the answer too. I did side by side driveway race with my neighbor who has a 2016 mustang vert. Granted, his isn’t a GT, but the hp and torque of his top is the same as a GT. I beat his lil pony by 1.67 seconds.... and I did it from my porch, with my remote control, while multitasking with a lager in my other hand.

06-21-2019, 08:37 PM	#14
ArmanSS Drives: '18 Camaro 2SS VERT Join Date: Jun 2019 Location: Jacksonville, FL Posts: 121	I did some research and the SS convertible has all the same options as the coupe in regards to the cooling system aside from the aux coolant cooler and the brake ducts. That doesn’t seam like enough to justify why it would be limited to 25mph slower than the coupe. But maybe in GMs mind they thought that was enough.

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