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Increasing reliability of C7 Z51 for HPDE

 
Old 06-25-2019, 09:09 PM
  #21  
blueray16
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Originally Posted by quick04Z06 View Post
If you want to track you M7 Z51 car, what changes/adjustments should I make JUST for reliability's sake for the long haul?
Thanks.
Heat is the enemy of all internal combustion engines!

For longevity you should consider upgrading your 2015 with the Chevy performance secondary radiator Kit that became stock on all C7's starting with MY 2017. Part #84309470
That addition to my '16 Z51 along with the new OW40 oil reduced max water temps at Watkins Glen from 250 to 207 and max oil from 286 (with M1 15W50) to 259. I also have the Z06 grill which delivers 17% more air.. (be sure to remove the frt license plate along with the usual track prep.
So far this summer water and oil temps have been less than 200* in normal driving. Impressive!

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Old 06-26-2019, 12:07 PM
  #22  
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Originally Posted by X25 View Post
Just remove it from the exhaust stream and let it hang by the side. Mine had never caused a problem with that setup.
I understand that there are several hacks available to get around the problem, but I still have a couple of years left on my warranty that I don't want to void it. I just wish that Chevy could (and should) come up with a permanent fix for a problem that proper testing would have identified to begin with. My local Chevy service has been very responsive in fixing the problem multiple times, but Chevy Customer Service has been very disappointing to say the least.
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Old 06-26-2019, 12:32 PM
  #23  
BrunoTheMellow
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Originally Posted by dp201 View Post
I understand that there are several hacks available to get around the problem, but I still have a couple of years left on my warranty that I don't want to void it. I just wish that Chevy could (and should) come up with a permanent fix for a problem that proper testing would have identified to begin with. My local Chevy service has been very responsive in fixing the problem multiple times, but Chevy Customer Service has been very disappointing to say the least.
Moving your actuator won't void anything.
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Old 06-26-2019, 12:44 PM
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Wonder if my Corsa X-pipe reduced heat at all. Car had a good bit of hard use on hot days and never any issues.
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Old 06-26-2019, 03:01 PM
  #25  
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Originally Posted by BrunoTheMellow View Post
Moving your actuator won't void anything.
Thanks.
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Old 06-26-2019, 05:25 PM
  #26  
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Originally Posted by blueray16 View Post
That addition to my '16 Z51 along with the new OW40 oil reduced max water temps at Watkins Glen from 250 to 207 and max oil from 286 (with M1 15W50) to 259.
Anyone else see similar results? I assumed the 50 weight would be better on track.
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Old 06-26-2019, 06:22 PM
  #27  
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Originally Posted by JMII View Post
Anyone else see similar results? I assumed the 50 weight would be better on track.
43 degrees decrease in water temp is bullshit. Ambient temp must have been much lower. GM only quotes 25 degrees and they would quote the highest improvement they could.

Heavier weight oil has no effect on temps. All it does is not get as thin when oil temps are high.
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Old 06-26-2019, 09:07 PM
  #28  
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[QUOTE=BrunoTheMellow;1599651023]43 degrees decrease in water temp is bullshit. Ambient temp must have been much lower. GM only quotes 25 degrees and they would quote the highest improvement they could.

I would have to agree. To be clear, I checked the temps for the Glen on June 20 2017 which was the last time i was able to run full sessions and it was reported to be 75*. On June 12 2019 , DIC was showing 72* . Also improved my best lap by 2 sec.over 2017.
I can't explain it. Actually, I now recall having a shop flush the coolant while doing some other work on the car. I later found they filled 50/50 mixture which i flushed and refilled at the correct 20/80 mixture when i installed the secondary rad. That's all I can come up with.

Finally, we haven't had much heat and humidity here so far this summer. But today I went out and ran a few errands in town.
2 or 3 stops, about an hour. 93* and running the AC. Max water temp was 195* max oil was 190* Money well spent IMO
Your results may vary
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Old 06-26-2019, 09:56 PM
  #29  
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[QUOTE=blueray16;1599651928]
Originally Posted by BrunoTheMellow View Post
43 degrees decrease in water temp is bullshit. Ambient temp must have been much lower. GM only quotes 25 degrees and they would quote the highest improvement they could.

I would have to agree. To be clear, I checked the temps for the Glen on June 20 2017 which was the last time i was able to run full sessions and it was reported to be 75*. On June 12 2019 , DIC was showing 72* . Also improved my best lap by 2 sec.over 2017.
I can't explain it. Actually, I now recall having a shop flush the coolant while doing some other work on the car. I later found they filled 50/50 mixture which i flushed and refilled at the correct 20/80 mixture when i installed the secondary rad. That's all I can come up with.

Finally, we haven't had much heat and humidity here so far this summer. But today I went out and ran a few errands in town.
2 or 3 stops, about an hour. 93* and running the AC. Max water temp was 195* max oil was 190* Money well spent IMO
Your results may vary
How are you getting water temps below where the thermostat even opens (stock is 207 degrees). Did you adjust your fan programming or get a 180 thermostat?
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Old 06-26-2019, 10:03 PM
  #30  
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[QUOTE=Casey Clark;1599652259]
Originally Posted by blueray16 View Post

How are you getting water temps below where the thermostat even opens (stock is 207 degrees). Did you adjust your fan programming or get a 180 thermostat?
Stock is 194...
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Old 06-26-2019, 11:08 PM
  #31  
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[QUOTE=BrunoTheMellow;1599652323]
Originally Posted by Casey Clark View Post

Stock is 194...
According to the parts catalog, it is not on my '14 Base. Mine is 207. But...it looks like in '15+ cars (Base or otherwise) the thermostat is 194....Crazy.
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Old 06-26-2019, 11:29 PM
  #32  
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[QUOTE=Casey Clark;1599652695]
Originally Posted by BrunoTheMellow View Post

According to the parts catalog, it is not on my '14 Base. Mine is 207. But...it looks like in '15+ cars (Base or otherwise) the thermostat is 194....Crazy.
How is that crazy? It's not very low.
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Old 06-26-2019, 11:34 PM
  #33  
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[QUOTE=BrunoTheMellow;1599652780]
Originally Posted by Casey Clark View Post

How is that crazy? It's not very low.
Because it's the exact same engine in these cars. GM went to the trouble of changing the thermostat and adjusting the fan curve for what reason? 207 is high to me. Maybe even the highest thermostat I have ever had in a car.
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Old 07-09-2019, 11:11 PM
  #34  
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Originally Posted by Tool Hoarder View Post
PS - I bought Edgy Vette AFM sims expecting mine to fail, but they never did.
Do you still have the EdgyVette solution?
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