Is ZR1 power limited until 500 miles?
08-25-2019, 10:13 AM
#21
More details...i did quite a few pulls from a slow rolling start in 1st gear all the way to about 4500 rpm. This was at 5000 feet. The car had 300 miles on it. During none of those runs did the rear break traction. The next day i took it out with my goal of getting to 500 miles. I was mostly driving over 7000 feet. At 490 miles i did another short pull and the rear wheels broke loose easily. At 500 miles i did it again and it broke loose and stepped out easily, and the engine just felt a lot stronger. Sort of caught me off guard.
08-25-2019, 11:14 AM
#22
Banned Scam/Spammer
Why are people still discussing this? There are videos of dyno pulls below 500 miles and after 500 miles with NO difference. Case closed.
The following users liked this post:
Ninetres (08-25-2019)
08-25-2019, 01:01 PM
#23
I am happy so that is all that matters.
08-25-2019, 01:06 PM
#24
Drifting
More details...i did quite a few pulls from a slow rolling start in 1st gear all the way to about 4500 rpm. This was at 5000 feet. The car had 300 miles on it. During none of those runs did the rear break traction. The next day i took it out with my goal of getting to 500 miles. I was mostly driving over 7000 feet. At 490 miles i did another short pull and the rear wheels broke loose easily. At 500 miles i did it again and it broke loose and stepped out easily, and the engine just felt a lot stronger. Sort of caught me off guard.
Last edited by bcmarly; 08-25-2019 at 02:46 PM.
08-25-2019, 08:37 PM
#26
Am I the only one scratching my head and going "hmmm" to see a representative from a company that sells performance upgrades on the C7 who calls the 4500 RPM redline a myth? Especially when he posts a picture showing a 4500 RPM redline? Am I just missing some insider joke here?
I've been saying this was a myth since the Z06s... I had my C7 within the first couple of months of them being out, so I never could remember on that one. But my ZR1 did not have any redline restrictions when picking it up. You can see here with just 77mi on the odometer, that redline is still 6500 RPMs on the maiden voyage home from Detroit. Does anyone have a pic showing otherwise? I was calling in favors (and being told NO LOL) before ordering asking for the PCM to be unlocked and the car could be built without 4G wifi and could have the warranty voided off the line. Not going to lie, when my 4G and NAV didn't work the entire drive home, I had high hopes! LOL But I can indeed show you at least mine had no lower redline.
08-26-2019, 08:29 AM
#27
Some of you guys simply lack information and experience with this car. There is no power difference before and after 500 miles. There has NEVER been a mass production that did similar visual pre and post break-in on the dashboard which had power limitation. I have owned several similar cars including the ZR1, multiple generation M3s, multiple generation M5s.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”. Simply because there are so many different levels of expressing power X. There is boost pressure, timing, fuel pressure, list goes on. And for each of those, there are EPA considerations, there are insurance as well as legal ramifications. Can you guarantee that some edgecase when boost pressure is half of normal value will not result in some engine fire?
You see? Its never that simple. And whats simple is spreading misinformation and rumors.
Even after 8 years of original release, there are people in the M5 post who still argue your point - that M5 has less power before 1200 miles. Its simply not true.
I have owned 3 M5s. I bought them brand new, I broke them all same. I did a lot of testing and zero changes before and after break-in. Same with M3s. Same with ZR1s.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”. Simply because there are so many different levels of expressing power X. There is boost pressure, timing, fuel pressure, list goes on. And for each of those, there are EPA considerations, there are insurance as well as legal ramifications. Can you guarantee that some edgecase when boost pressure is half of normal value will not result in some engine fire?
You see? Its never that simple. And whats simple is spreading misinformation and rumors.
Even after 8 years of original release, there are people in the M5 post who still argue your point - that M5 has less power before 1200 miles. Its simply not true.
I have owned 3 M5s. I bought them brand new, I broke them all same. I did a lot of testing and zero changes before and after break-in. Same with M3s. Same with ZR1s.
The following users liked this post:
BearZ06 (08-26-2019)
08-26-2019, 10:56 AM
#28
Race Director
I also can attest that there is no power limitations before 500 miles. Neither my 16 Z06 or my 19 ZR1 had any trouble making full power before 500 miles.
08-26-2019, 11:00 AM
#29
Drifting
Some of you guys simply lack information and experience with this car. There is no power difference before and after 500 miles. There has NEVER been a mass production that did similar visual pre and post break-in on the dashboard which had power limitation. I have owned several similar cars including the ZR1, multiple generation M3s, multiple generation M5s.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”.
Pretty much predates the internet and it’s not like there’s any of these really still sitting around brand new, so a quick google search didn’t find me anything. But I do know that GM ECMs from like the 80’s had something in their MEMCAL/EEPROM that was called, I wanna say, E CELL. In a nutshell, it was an fuel enrichment for break in purposes that was active for a number of miles or hours.
I’ve been working on cars for a little over 20 years, so this is stuff I’ve never had to deal with because it really predates my career too. But from instructors I had, and what I’ve seen hooking up scan tools to some of those pre OBD2 cars, I know it existed.
08-26-2019, 11:58 AM
#30
There actually have been vehicles with a “break in” tune from the factory. From GM even.
Pretty much predates the internet and it’s not like there’s any of these really still sitting around brand new, so a quick google search didn’t find me anything. But I do know that GM ECMs from like the 80’s had something in their MEMCAL/EEPROM that was called, I wanna say, E CELL. In a nutshell, it was an fuel enrichment for break in purposes that was active for a number of miles or hours.
I’ve been working on cars for a little over 20 years, so this is stuff I’ve never had to deal with because it really predates my career too. But from instructors I had, and what I’ve seen hooking up scan tools to some of those pre OBD2 cars, I know it existed.
Pretty much predates the internet and it’s not like there’s any of these really still sitting around brand new, so a quick google search didn’t find me anything. But I do know that GM ECMs from like the 80’s had something in their MEMCAL/EEPROM that was called, I wanna say, E CELL. In a nutshell, it was an fuel enrichment for break in purposes that was active for a number of miles or hours.
I’ve been working on cars for a little over 20 years, so this is stuff I’ve never had to deal with because it really predates my career too. But from instructors I had, and what I’ve seen hooking up scan tools to some of those pre OBD2 cars, I know it existed.
08-26-2019, 02:13 PM
#31
Le Mans Master
Some of you guys simply lack information and experience with this car. There is no power difference before and after 500 miles. There has NEVER been a mass production that did similar visual pre and post break-in on the dashboard which had power limitation. I have owned several similar cars including the ZR1, multiple generation M3s, multiple generation M5s.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”. Simply because there are so many different levels of expressing power X. There is boost pressure, timing, fuel pressure, list goes on. And for each of those, there are EPA considerations, there are insurance as well as legal ramifications. Can you guarantee that some edgecase when boost pressure is half of normal value will not result in some engine fire?
You see? Its never that simple. And whats simple is spreading misinformation and rumors.
Even after 8 years of original release, there are people in the M5 post who still argue your point - that M5 has less power before 1200 miles. Its simply not true.
I have owned 3 M5s. I bought them brand new, I broke them all same. I did a lot of testing and zero changes before and after break-in. Same with M3s. Same with ZR1s.
Factually speaking I have pretty good understanding of how some of these cars are tuned, how software tuning works, and I can tell you without tremendous testing and extra risk, there is no way to implement this. There is no piece of software that works like “hey give me a number X and I will limit power to that level X and below”. Simply because there are so many different levels of expressing power X. There is boost pressure, timing, fuel pressure, list goes on. And for each of those, there are EPA considerations, there are insurance as well as legal ramifications. Can you guarantee that some edgecase when boost pressure is half of normal value will not result in some engine fire?
You see? Its never that simple. And whats simple is spreading misinformation and rumors.
Even after 8 years of original release, there are people in the M5 post who still argue your point - that M5 has less power before 1200 miles. Its simply not true.
I have owned 3 M5s. I bought them brand new, I broke them all same. I did a lot of testing and zero changes before and after break-in. Same with M3s. Same with ZR1s.
With that said, I don't think they did anything other than change the display.
The following users liked this post:
.gearhead. (08-26-2019)
08-26-2019, 04:15 PM
#32
Banned Scam/Spammer
Am I the only one scratching my head and going "hmmm" to see a representative from a company that sells performance upgrades on the C7 who calls the 4500 RPM redline a myth? Especially when he posts a picture showing a 4500 RPM redline? Am I just missing some insider joke here?
Last edited by Sub Driver; 08-26-2019 at 04:16 PM.
08-26-2019, 06:40 PM
#33
Racer
On my drive home from Ohio to Illinois in my new ZR1, I made three blasts out of the toll booths with around 300 miles on the odometer. I can say with great confidence that no stricter limit existed that day than exists today with over 1000 miles. Myth...
08-28-2019, 04:15 PM
#34
Race Director
I know that we have beat this horse to death, but thought I would simply share a small piece of other data. I usually keep my ins cluster on the Tour setting, but lately I've been watching my TPMS sensors a little closer so I've kept it in Track. And in Track it shows the " redline " as lower until it comes up to regular temps. Even in 90 degree days the redline/yellow line starts off at around 4K or in that ballpark. And, no, the performance isn't limited it's just showing you that it isn't up to full temp yet and you may want to keep the rpms a little lower until it comes up.