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Old 04-27-2013, 05:49 PM   #26
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Originally Posted by BigBlock69RS View Post
Lot of threads on this topic, but actually yes the coupes (and verts) are limited to 155, barring a tune. Zl1 coupes are not. The main reason is above 155 the front end begins to lift, they changed that with the zl1 coupe hence no longer speed limited.

http://www.camaro5.com/forums/showthread.php?t=169208
http://www.camaro5.com/forums/showthread.php?t=160452

https://www.google.com/search?q=cama...+speed+limited

Seeing this is the ZL1 area, and the topic was ZL1 Verts, My statement needed no correction about the coupes had no limiter from the factory.

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Old 04-27-2013, 05:55 PM   #27
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Who ever is saying that only verts are limited is wrong, I have a 2012 SS coupe and I hit 155mph n got the "speed limited" to 155 mph but yes u can get a tune to remove the speed governor. Now 155mph wasn't fast enough for me so I tuned it n so far I've hit 168mph but I was running out of road so I had to start slowing down after that.Now on the ZL1 yes verts are limited and coupes are not, just adding my 2cents
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Old 04-27-2013, 06:17 PM   #28
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Originally Posted by 45thCAMARO 2SS/RS View Post
Who ever is saying that only verts are limited is wrong, I have a 2012 SS coupe and I hit 155mph n got the "speed limited" to 155 mph but yes u can get a tune to remove the speed governor. Now 155mph wasn't fast enough for me so I tuned it n so far I've hit 168mph but I was running out of road so I had to start slowing down after that.Now on the ZL1 yes verts are limited and coupes are not, just adding my 2cents

WE ARE TALKING ABOUT ZL1 VERTS, AND ZL1 COUPES ONLY. You guys keep bringing up stuff about the SS, that should be done in the SS section and not here.
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Old 04-27-2013, 06:30 PM   #29
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WE ARE TALKING ABOUT ZL1 VERTS, AND ZL1 COUPES ONLY. You guys keep bringing up stuff about the SS, that should be done in the SS section and not here.
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Old 04-27-2013, 07:19 PM   #30
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Originally Posted by SlingShot View Post
WE ARE TALKING ABOUT ZL1 VERTS, AND ZL1 COUPES ONLY.
Relax lol and at the same time. I've had my Z coupe upto 160 stock. Here's my question, on a Z vert would the Pillars be able to hold up to that kind of stress from all the air pressure against the front glass?

From a safety point though and whether or not the top is up, you guys roll that thing at higher speeds you have no chance of walking away. Albeit rolling it at 155 I still don't know if one could walk away. Personally and in my own opinion I think it was a good call by GM to limit the vert to that.
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Old 04-27-2013, 09:34 PM   #31
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187mph in my last car was deadly quiet and tracked completely straight.........I just ran out of man marbles. At nearly 300' per second you don't have a lot of room for error. Back on topic though, and seriously a concern, at what speed with the convertible top just peel itself away from the car or possibly be damaged in some way?
That is where the limiter used to kick in on my bike. Installed a timing retard eliminator. Now HP is the limit.
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Old 04-28-2013, 09:39 AM   #32
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Back on topic though, and seriously a concern, at what speed with the convertible top just peel itself away from the car or possibly be damaged in some way?
155 1/2.

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Old 04-28-2013, 10:21 AM   #33
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I ran a 97 SS vert -Mods mainly was engine and suspension- back in 1999 to 170 mph (I stayed on that speed for a whole minute, don't ask me where I did this), the air pressure sounds around the front wind shield was the main reason I didn't go further, after that run I didn't have any structure damage to the top.
Which makes me think that C5 vert should have a better structural integrity than C4 vert, since it's 15 years later..
Otherwise if its the same I would say don't go over 160 mph in a vert because the sounds alone are scary enough.

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Old 04-28-2013, 04:39 PM   #34
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I ran a 97 SS vert -Mods mainly was engine and suspension- back in 1999 to 170 mph (I stayed on that speed for a whole minute, don't ask me where I did this), the air pressure sounds around the front wind shield was the main reason I didn't go further, after that run I didn't have any structure damage to the top.


I'm guessing either the flats on 95 or that section way out west on 90?
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Old 04-28-2013, 05:27 PM   #35
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I'm guessing either the flats on 95 or that section way out west on 90?
No, I was somewhere in Utah, leaving it at that (was a road trip from L.A. to Boston).

I'm itching to do that again.

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Old 04-29-2013, 09:43 PM   #36
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So I would need a tune. Thanks to those that answered my question.
thanks to the rest who added info or entertainment!
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Old 04-29-2013, 09:59 PM   #37
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155 1/2.

Damn you're right. Found out tonight.
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Old 04-29-2013, 11:15 PM   #38
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Damn you're right. Found out tonight.
Break-In period must be done?
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Old 04-30-2013, 04:05 PM   #39
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Break-In period must be done?
Uh, yeah, about that.........
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Old 04-30-2013, 04:45 PM   #40
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Uh, yeah, about that.........
Me too!
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Old 04-30-2013, 11:17 PM   #41
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The ZL1 is limited as well...set at 202mph from the factory.
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Old 05-02-2013, 09:39 PM   #42
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The ZL1 is limited as well...set at 202mph from the factory.
Are you saying the coupe is set to 202? I wonder what the stated need for that is? Of course, why would anyone in coupe want to go faster than 202?
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Old 05-02-2013, 09:50 PM   #43
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Yesterday I saw the message...speed limited to 155mph... Hard as I tried I couldn't get it past that. I am told that you can just flash the computer to remove the limiter and flash it back if you need to take it to a dealer and not void the warranty.
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Old 05-02-2013, 10:01 PM   #44
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Yesterday I saw the message...speed limited to 155mph... Hard as I tried I couldn't get it past that. I am told that you can just flash the computer to remove the limiter and flash it back if you need to take it to a dealer and not void the warranty.
I don't know anything about tuning so how do you do that?
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Old 05-02-2013, 10:04 PM   #45
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Yesterday I saw the message...speed limited to 155mph... Hard as I tried I couldn't get it past that. I am told that you can just flash the computer to remove the limiter and flash it back if you need to take it to a dealer and not void the warranty.
Not true. If you flash the computer, the dealer will be able to tell no matter if you flash it back or not. There is an embedded counter that will be tripped when you do a tune.
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Old 05-03-2013, 06:47 AM   #46
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Not true. If you flash the computer, the dealer will be able to tell no matter if you flash it back or not. There is an embedded counter that will be tripped when you do a tune.

Good to know. I was told that the computer could be flashed and the counter could be set back.
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Old 05-03-2013, 07:19 AM   #47
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jeez i need to find some of the places you guys go for these runs. gm putting the coupe limit at 202 seems odd as i thought the ZL-1 maxed out around 186 or so. i thought the ZR-1 was at 202 mph
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Old 05-10-2013, 01:18 AM   #48
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Does anyone know for sure if eliminating the governor would void the warranty? I don't recall GM telling me that. Since they didn't bother to mention there was one, why would I be obligated to keep it?
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Old 05-10-2013, 05:31 AM   #49
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Guessing that any reflash of the PCM is a warranty voider regardless of which parameters were touched.
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Old 05-10-2013, 11:34 AM   #50
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Does anyone know for sure if eliminating the governor would void the warranty? I don't recall GM telling me that. Since they didn't bother to mention there was one, why would I be obligated to keep it?
Maybe I you set it to the Coupes governed limit.. I don't know what that is. But I am assuming the vert has it because if you crash at anything above 155 it would be way worse than 155? That may be their logic, I am not sure. Or because the top may fly open. If your engine had problems because you tuned it to a coupes governed limit, I don't think you could get in trouble. But if your top messed up, I don't think they would cover it. Seems a little ace backwards, but they have their reasons I guess..
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