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ZO6 overheating issues ***MEGA Merge***

 
Old 04-29-2019, 04:23 AM
  #5401  
Z06Norway
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Default UPDATE after track days

Originally Posted by Z06Norway View Post
So then i can get my expenses covered ?
Did my own solution, found this front in east Germany, think it looks OEM and i love it.
I took oil cooler out of main water, and send oil through 200 F thermostat to driver side setrab cooler, then across to another setrab cooler in passenger side and return to engine.
Main radiator swapped out for Dewitt, so 20-30 % better cooling.
stock SC swapped out for TVS2300 Magnuson.
IC cooler circuit, removed stock tank, Weapon X tank up high, Bosch pump, water through driver side setrab cooler, then across to passenger side setrab cooler, then through stock IC cooler and then into TVS2300
glycol/water swapped out to straight water + water wetter

So now i hope my oil temp is south of 260F, water south of 216F and IC south of 140F, fingers crossed




A quick update from Norway after my first two days on track.
MPSS tires, as i need to save the cup2 for my 2 days nurburgring and SPA trip end of may.

2 and 1/4 tank used and felt like running continuously with stops and new passenger rides (Porsche guys lined up to get a feel for a real car :-)
140 miles on track, bad MPG :-)
I still have issues with sound level and was forced to not go WOT after one specific turn for 300 feet, this was the turn leading into long straight so it hurt my lap times..
90 dB required , i have 100 dB :-0
Previuosly i did 1.00 sec with cup 2, now i did 1.01.3 with MPSS

Anyway, i am super happy with my setup results.
Water never got above 208F
Oil never got above 248F, with the normal average 238-240
IAT2 i cannot see on Cosworth toolbox, but by how hard the car pulled all the time, i have to say twin front coolers + original cooler is making PCM very happy, commanding full power all the time...

One cool down lap would take down water to 195F and oil to 222F.
Oil pressure ís identical to what it was on stock engine with stock setup, and according to Heinz at CoolChevyRaceparts in austria that rebuilt my stock engine this is due to oil pump design and electronically controlled oil pressure commanded ....??? i dont know , and can't comment more than that.... All i know is my oil pressure was 33-36 psi.
Scary low compared to old school engine know how... but it is what it is i am told :-)

THIS is how GM should have delivered it..... Looks OEM and does what it is supposed to do on track :-)
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Old 04-29-2019, 04:56 AM
  #5402  
Telepierre
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Great work Z06N.

What were the ambient temps in Norway during your test track days?

Cheers!
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Old 04-29-2019, 05:01 PM
  #5403  
Z06Norway
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Originally Posted by Telepierre View Post
Great work Z06N.

What were the ambient temps in Norway during your test track days?

Cheers!
Ah forgot that, we had beautiful unseasonal 72F and sunny :-)
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Old 04-29-2019, 07:04 PM
  #5404  
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Originally Posted by Z06Norway View Post
Ah forgot that, we had beautiful unseasonal 72F and sunny :-)
So add about 30 degrees to your test numbers for summer
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Old 04-30-2019, 04:31 AM
  #5405  
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Originally Posted by Tom DeWitt View Post
So add about 30 degrees to your test numbers for summer
?
Why would i add 30 degrees ? to oil ?
72 F vs 88F ?


Also looked at october track day , Ambient 48F stock setup
Oil 265F
Water 216

So my DeWitt main radiator makes main cooling happy, my twin oil Setrab makes oil happy and i dont know how much cooler IAT2 is before i get HP Tuners connected on track...
But in my simple world, i now have increased intercooler area by 200%, and new Bosch pump has 2.5 times the flow of the stock pump, so it should be alot better ?

If anything i am thinking of ditching the stock intercooler in front as i believe delta T on that one is very low and not working well, and adding restrictions to flow?
Its the last one in the chain (first driver side Setrab, then passenger Setrab, then stock intercooler front)
Think i might will do a two pump setup and have one IC for each side of the SC intercooler, both pump feeding from intercooler reservoir up high

Last edited by Z06Norway; 04-30-2019 at 04:48 AM.
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Old 05-01-2019, 12:07 PM
  #5406  
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Originally Posted by Z06Norway View Post
?
Why would i add 30 degrees ? to oil ?
72 F vs 88F ?


Also looked at october track day , Ambient 48F stock setup
Oil 265F
Water 216

So my DeWitt main radiator makes main cooling happy, my twin oil Setrab makes oil happy and i dont know how much cooler IAT2 is before i get HP Tuners connected on track...
But in my simple world, i now have increased intercooler area by 200%, and new Bosch pump has 2.5 times the flow of the stock pump, so it should be alot better ?

If anything i am thinking of ditching the stock intercooler in front as i believe delta T on that one is very low and not working well, and adding restrictions to flow?
Its the last one in the chain (first driver side Setrab, then passenger Setrab, then stock intercooler front)
Think i might will do a two pump setup and have one IC for each side of the SC intercooler, both pump feeding from intercooler reservoir up high
LG does this with no problems apparently with the stock intercooler pump. just twins on the corners.

Two reasons to keep the middle one other than extra cooling:
More volume.
Fan would pull air through when going slow or standing still (or else the water would heat up idling)
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Old 05-01-2019, 12:09 PM
  #5407  
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Originally Posted by thebishman View Post
The OEM thermostat opens at 212dF iirc, so the temps you’re seeing are normal. At least for the C7s.
this is way wrong. it's at most 194. I remember reading it was lowered to 185 in later years. I might be wrong. But i am certain of 194 for 2015s.
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Old 05-01-2019, 12:15 PM
  #5408  
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Originally Posted by LG Motorsports View Post
We never got over 194 F water temperature for our entire time at Nurburgring


@LG Motorsports Lou, what all is this car running. Am i correct to say:
LG cooler system (twin cheek intercoolers)
+ LG Radiator
+ race fan or is it no fan?
+ Gm aux cooler used as oil cooler?

or are you running the GM aux cooler + the setrab 420-10 mounted on the crash bar?

Also the ducts on this car look cleaner, better positioned than previous cars. What do you think about buying a z06 grill and cutting it to size? is it not restrictive enough for rocks, etc?
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Old 05-01-2019, 12:25 PM
  #5409  
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Originally Posted by BrunoTheMellow View Post
@LG Motorsports Lou, what all is this car running. Am i correct to say:
LG cooler system (twin cheek intercoolers)
+ LG Radiator
+ race fan or is it no fan?
+ Gm aux cooler used as oil cooler?

or are you running the GM aux cooler + the setrab 420-10 mounted on the crash bar?

Also the ducts on this car look cleaner, better positioned than previous cars. What do you think about buying a z06 grill and cutting it to size? is it not restrictive enough for rocks, etc?
-Twin Intercooler System
-Race Fan
-That's an old design, GM cooler was left in place. We were able to run a large cooler post radiator because our does a better job of extracting heat from the engine bay.
-We recently changed carbon manufactures due to the previous having variances from set to set.

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