Down 200 hp at the track
05-08-2015, 08:16 AM
#21
Racer
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05-08-2015, 08:23 AM
#24
Melting Slicks
I agree 
Maybe GM is parsing their words: the car is "track capable" [but needs modifications paid for by the owner, that likely void the factory warranty,
to make it reliable just for HPDE use as such].
I love the car (don't own one) and what it is and represents, but this is all sounding more & more like slick marketing, to me.
Intentional sleight-of-hand ?
Bottom line, GM has delivered the platform (in their view). The owner can take it to the next level on their own dime.
I think GM does not want to pay for power-train replacements for anyone tracking their car. Maybe they soured on this with
the LS7 engine issues...(and yes, we know that not all of those engines that had problems were in cars that were tracked).
It's the only explanation I can think of, as GM's engineers are certainly capable of understanding and solving the C7 power-train issues
that many are reporting on the track.
Let's hope GM is forthcoming with solutions, post-production or not...
to make it reliable just for HPDE use as such].
I love the car (don't own one) and what it is and represents, but this is all sounding more & more like slick marketing, to me.
Intentional sleight-of-hand ?
Bottom line, GM has delivered the platform (in their view). The owner can take it to the next level on their own dime.
I think GM does not want to pay for power-train replacements for anyone tracking their car. Maybe they soured on this with
the LS7 engine issues...(and yes, we know that not all of those engines that had problems were in cars that were tracked).
It's the only explanation I can think of, as GM's engineers are certainly capable of understanding and solving the C7 power-train issues
that many are reporting on the track.
Let's hope GM is forthcoming with solutions, post-production or not...
05-08-2015, 08:33 AM
#25
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05-08-2015, 08:41 AM
#26
Le Mans Master
That is why the Miata holds every track record in the world fools! Don't believe those Porsche 918, 911TT,Viper ACR, ZR1, Z06 times - all lies.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
05-08-2015, 08:47 AM
#27
Racer
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05-08-2015, 09:24 AM
#28
Scraping the splitter.
I'll be honest, and all of my PDR data shows it, I haven't had any substantial decrease in power from start of session to the end at Daytona (mid-80's) or Sebring (low-mid 90's). That being said, it could be that the car is effected already after the first warmup lap so any related timing pull has already happened. But it still ran mid-170's into T1 at Daytona and mid-140's at Sebring (and I was easy into T17 for both days and figure the car will run low-150's next time out in the fall).
If you were running consistently lower vmax then you have to wonder why.
S.
05-08-2015, 09:31 AM
#29
Instructor
Something must have been pulling power as their is no way in the straight you should not have caught a stock stingray. HP does equate to speed in this case. Obviously some people are having issues with heat I just have personally not had this issue. It is odd that some cars are having this issue a lot while others don't seem to have it at all. For those of you that comment that don't have a Z06 or haven't driven one your opinion really is a waste of space go play on your forum. I welcome feedback from people who have had issues that actually have the car or have spent some time driving it. I for one still find it a great car that has a lot of potential. GM does need to address the heat issue which I am sure they will.
05-08-2015, 09:56 AM
#30
That is why the Miata holds every track record in the world fools! Don't believe those Porsche 918, 911TT,Viper ACR, ZR1, Z06 times - all lies.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
05-08-2015, 10:00 AM
#31
Well you sure as hell didnt have any issue with oil and water temps so you have another issue. Best try that again and see what happens this time try different fuel and monitor after every session.
05-08-2015, 10:48 AM
#33
Le Mans Master
Too bad, I too don't own one (still hate that rear and those front spats) BUT even if I loved it the way it is, wouldn't buy a 1st year or even 2nd year car.......but that's me.
Hopefully you or GM can fix things up.
Hopefully you or GM can fix things up.
05-08-2015, 11:03 AM
#35
Burning Brakes
Your car shouldn't be pulling power at these temps as they don't look out of line. You may have a different issue than heat related.
05-08-2015, 11:52 AM
#36
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2017 C5 of the Year Finalist
St. Jude Donor '08
That is why the Miata holds every track record in the world fools! Don't believe those Porsche 918, 911TT,Viper ACR, ZR1, Z06 times - all lies.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
Sorry bud this is about an HPDE not going for a Sunday cruise. Stick to the latter as the former does not appear to be in your wheelhouse.
I drive, and have driven a supercharged C5 for the last 10 years on the roadcourse, and have been through all the issues that GM is dealing with on the Z06. I'm happy to say that I've got to the other side of all my issues.
I currently run a total of 8 coolers on the car:
2 heat exchangers for the custom oversized aftercooler
2 coolers for the fuel
coolers on the diff, tranny and oil
double wide Dewitts Rad
With my duel nozzle meth injection, and the above coolers, I can now run a pretty good 20 minute session at 100 degrees, with negligible timing being pulled...
Just because it does not go into limp mode, as a Z06 did at Fontana last week,
https://www.corvetteforum.com/forums...the-track.html
does not mean that it is not down on power at the 220 plus coolant range. GM MAY start pulling power at that coolant temp...
05-08-2015, 12:24 PM
#37
I had a similar experience at Daytona, but I think mine was related to the Traction system. At one point my slip light went on and I thought nothing off it. This triggered a check engine light (light was flashing) and then stopped. Flashed then stopped
Started and stopped the car a few times, went to get gas and noticed that stomping on the power car hesitated like slipping clutch / brakes on at same time. I could get it up to speed only by pushing throttle about 50% then it was smooth, but anything more it jerked
So i took it out on track for another session and set my dial to the HP gauge (bottom left). car would not get above 500hp per the gauge while the check engine light kept flashing. About 10 minutes into the session when I was about to pit, the light turned off completely and I got all 650hp back (per the gauge) and no more issues.
Once again, not sure what triggered this. It was not coolant or oil temps. It started with a little bit of slippage at one of the corners
Started and stopped the car a few times, went to get gas and noticed that stomping on the power car hesitated like slipping clutch / brakes on at same time. I could get it up to speed only by pushing throttle about 50% then it was smooth, but anything more it jerked
So i took it out on track for another session and set my dial to the HP gauge (bottom left). car would not get above 500hp per the gauge while the check engine light kept flashing. About 10 minutes into the session when I was about to pit, the light turned off completely and I got all 650hp back (per the gauge) and no more issues.
Once again, not sure what triggered this. It was not coolant or oil temps. It started with a little bit of slippage at one of the corners
05-08-2015, 12:29 PM
#40
Melting Slicks
