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HPDE your Z06?

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Old Sep 26, 2017 | 02:31 PM
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Default HPDE your Z06?

This weekend will be my first track event with the Z06. I was wondering if anyone knows if the small changes made for 2017 made any difference in the temperature concerns?
Also anyone who has tracked their C7 what would be considered a safe range for both oil and water temperatures?
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Old Sep 26, 2017 | 07:58 PM
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Originally Posted by ncstingray
This weekend will be my first track event with the Z06. I was wondering if anyone knows if the small changes made for 2017 made any difference in the temperature concerns?
Also anyone who has tracked their C7 what would be considered a safe range for both oil and water temperatures?
I am assuming your Z is a '17.

Do what the manual says to change oil, brake fluid, alignment. I ran our Z all summer long, A8 in auto sport and manual track shifting at 5k, and got to limp mode once after 25 min on a 100 degree day. Unless you are good enough to really push the car to its limits you should be just fine
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Old Sep 26, 2017 | 09:00 PM
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Not sure if the manual calls for it, but running 80/20 distilled water/coolant definitely helps a lot
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Old Sep 27, 2017 | 05:32 AM
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Originally Posted by village idiot
Not sure if the manual calls for it, but running 80/20 distilled water/coolant definitely helps a lot
I do have a glycolmeter to measure, and the factory fill was actually 70/30 on my '16 Z51!

Last edited by X25; Sep 27, 2017 at 05:32 AM.
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Old Sep 27, 2017 | 09:56 AM
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Thanks for all the great info. I had the oil changed at the 500 mile mark with Mobil 1 15w-50 but haven't changed any other fluids. I also have 1500 miles on the car before this first event, this is also recommended in the GM manual. Yes it is a 2017 Z06 with the Z07 package.

Last edited by ncstingray; Sep 27, 2017 at 09:57 AM.
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Old Sep 27, 2017 | 10:05 AM
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Depending on your skill level, and track speed, it would be a good idea to flush your brake fluid to a high quality (race) dot4 fluid like Castrol SRF, or Motul, etc.

If your car is a manual trans car, you already have the GM Secondary cooler installed, which does make a noticeable difference in keeping the coolant temps down. The car still runs warm though, and depending on how aggressively you drive, oil temps still get pretty high. Nothing to be too concerned about through, just go drive the car and have fun. If you have an automatic, that may be another story and I am sorry...
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Old Sep 27, 2017 | 06:47 PM
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Originally Posted by ncstingray
This weekend will be my first track event with the Z06. I was wondering if anyone knows if the small changes made for 2017 made any difference in the temperature concerns?
Also anyone who has tracked their C7 what would be considered a safe range for both oil and water temperatures?
In welcoming you as a new owner and junior forum member to the community I did a quick Search for you to get a definitive, quantitative answer to your question. Here you go:

https://www.corvetteforum.com/forums...vs-2015-a.html

Also, to answer/address your second question, GM has determined water temperature up to 262 F and oil temp up to 320 F to be acceptable and safe in the C7Z. The car will go into protective limp mode above these temps. My experience has shown backing off for one lap in a M7 car will allow the temps to drop back into the acceptable range and dismiss limp mode.

Rick

Last edited by rikhek; Sep 27, 2017 at 06:48 PM.
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Old Sep 27, 2017 | 07:06 PM
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Fantastic info Rick. For some reason I didn't find that thread. This weekend should be in the mid 70s at VIR so conditions look to be great. I will post my track experience on Monday.
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Old Sep 27, 2017 | 07:08 PM
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262 coolant is one thing but JFC, 320 degree oil temps? Sorry, I'm backing off after about 280.
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Old Sep 28, 2017 | 10:16 PM
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Originally Posted by village idiot
262 coolant is one thing but JFC, 320 degree oil temps? Sorry, I'm backing off after about 280.
Not a C7Z, but...
While having too much fun on a track one day, I ran our 2009 LS3 at 293' oil temp for about 5 minutes, three sessions. I was worried about that but the next oil analysis (Mobil1 5W-30) showed everything normal, in fact wear metals were down a little from normal. Still going great when sold at 102k miles six months later.
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Old Oct 2, 2017 | 01:03 PM
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VIR weekend complete and the Z06 came home in one piece. Coolant temps ran in the low 200s and the oil temps ran in the mid 200s. Car performed flawlessly. Definitely a track monster!
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Old Oct 2, 2017 | 02:20 PM
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EXCELLENT!!!!

Great to hear that the car performed well and you had a good time!!

.
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Old Oct 30, 2017 | 01:06 PM
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Another great VIR track session with the Z06!! A few of us Corvette drivers in a sea of six figure Porsches. I don't think the GT3, GT3RS and GT4 drivers appreciated getting passed by a Corvette.
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Old Oct 30, 2017 | 01:22 PM
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Originally Posted by Gearhead Jim
Not a C7Z, but...
While having too much fun on a track one day, I ran our 2009 LS3 at 293' oil temp for about 5 minutes, three sessions. I was worried about that but the next oil analysis (Mobil1 5W-30) showed everything normal, in fact wear metals were down a little from normal. Still going great when sold at 102k miles six months later.
I don't think it's sand in the intake manifold, but I doubt it's good for the car. Also, 290 to 320 is a big difference. Without proper race fluid, I'm not comfortable with that. That's a $15k mishap waiting to happen.
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Old Oct 30, 2017 | 05:07 PM
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Originally Posted by village idiot
I don't think it's sand in the intake manifold, but I doubt it's good for the car. Also, 290 to 320 is a big difference. Without proper race fluid, I'm not comfortable with that. That's a $15k mishap waiting to happen.
I agree that it's not good for the car, and I wasn't comfortable either. But I was having too much fun to stop, and took the risk.
In this case, it worked out fine.

Now I've got a 2017 Z51 and should have more margin.
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Old Oct 30, 2017 | 06:12 PM
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Do you have the PDR ? If so, pick up a SD card and remember to hit record before your laps!

Enjoy the new ride !
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Old Oct 31, 2017 | 07:25 AM
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I have had better luck with Harrys. I keep forgetting to turn on the PDR and messing up the finish line point. And then setting the correct overlay. How do these times compare to others who have tracked their Z06?




Originally Posted by MarkRacerX
Do you have the PDR ? If so, pick up a SD card and remember to hit record before your laps!

Enjoy the new ride !
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Old Oct 31, 2017 | 07:55 AM
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Originally Posted by ncstingray
I have had better luck with Harrys. I keep forgetting to turn on the PDR and messing up the finish line point. And then setting the correct overlay. How do these times compare to others who have tracked their Z06?
My personal best is a 1:59.0. I thought that was pretty good until GM announced yesterday that Jim Mero, their Corvette suspension engineer, turned a 1:55.95. That blows my mind.

Honestly, if you want actual data to analyze use the PDR with the Pi toolbox. Just start it during the normal startup sequence (track mode, PTM mode, active rev match on, start PDR). You only have to set the track overlay mode once and never touch it again.

Just download the appropriate map.gpx file to your SD card from this thread and as long as you leave it on the card you won't need to define the start finish line either.
https://www.corvetteforum.com/forums...px-thread.html
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Old Oct 31, 2017 | 08:32 AM
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I am humbled.....The good side is I know what the car is capable of if the right person is in the left seat!
I am heading back to VIR for a Thursday / Friday event this week so I will use the PDR with the map you mentioned. Thank you very much for this tip! I am looking forward to driving the Grand Course!

Originally Posted by Poor-sha
My personal best is a 1:59.0. I thought that was pretty good until GM announced yesterday that Jim Mero, their Corvette suspension engineer, turned a 1:55.95. That blows my mind.

Honestly, if you want actual data to analyze use the PDR with the Pi toolbox. Just start it during the normal startup sequence (track mode, PTM mode, active rev match on, start PDR). You only have to set the track overlay mode once and never touch it again.

Just download the appropriate map.gpx file to your SD card from this thread and as long as you leave it on the card you won't need to define the start finish line either.
https://www.corvetteforum.com/forums...px-thread.html
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Old Oct 31, 2017 | 08:35 AM
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I'll be there as well. Thursday through Sunday. Torch red Z06 staying in the full RV hookups. Come on by and we can look at data.

What run group are you in?
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