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View Poll Results: If you've Overheated What is Your Stage Aero 1, 2 or 3
Stage 1 Aero
24.43%
Stage 2 Aero
18.70%
Stage 3 Aero
56.87%
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ZO6 overheating issues ***MEGA Merge***

 
Old 04-30-2015, 02:17 AM
  #2021  
dmaxx3500
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guys,there was a trick -back in the day,
on overheating panteras,leave the hood on the safety latch[raising it up 1-2'']we would jam a pop can wrapped in a rag under it,doing this forced air out the back side of the engine compartment,,this would be a free try to see if any more airflow would help or hurt

gm spend millions on airflow thou

an other trick might be ,just remove the hood
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Old 04-30-2015, 05:42 AM
  #2022  
NemesisC5
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Originally Posted by rwheelz View Post
For $40 you can buy a pressure sensor and test anywhere you would like in the engine compartment. It would be incredibly easy to determine whether there is adequate airflow or whether more/larger vents are needed.
Can you provide a link where I can purchase?
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Old 04-30-2015, 08:24 AM
  #2023  
FiremanC7
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Originally Posted by soulsea View Post
Stage 4 aero with cooling pack:

Great post! Lol!
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Old 04-30-2015, 08:28 AM
  #2024  
thebishman
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Originally Posted by soulsea View Post
Stage 4 aero with cooling pack:

Might have an issue passing the Euro pedestrian safety regs? lol
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Old 04-30-2015, 08:41 AM
  #2025  
Poor-sha
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I applaud Bob for creating this thread with proposed solutions. Those shroud pieces *might* be there to direct water/snow/ice away from engine components that could have a detrimental impact over the life of the car. Frankly I don't know.

While we can speculate as to whether or not it will work it seems like this is fairly easy to test. Folks that are tracking the car and having overheating issues try removing those pieces at the track after you start having issues. Let's see if it helps.

The same goes for Lawdogg's trick of removing the weatherstrip at the base of the windshield.

I'll have my C7Z at VIR at the end of May and end of June. If I start having temp issues I'll try it myself.
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Old 04-30-2015, 08:52 AM
  #2026  
Snorman
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Originally Posted by Poor-sha View Post
I applaud Bob for creating this thread with proposed solutions. Those shroud pieces *might* be there to direct water/snow/ice away from engine components that could have a detrimental impact over the life of the car. Frankly I don't know.

While we can speculate as to whether or not it will work it seems like this is fairly easy to test. Folks that are tracking the car and having overheating issues try removing those pieces at the track after you start having issues. Let's see if it helps.

The same goes for Lawdogg's trick of removing the weatherstrip at the base of the windshield.

I'll have my C7Z at VIR at the end of May and end of June. If I start having temp issues I'll try it myself.
The electric power steering motor/assembly is almost directly underneath of the hood vent.
S.
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Old 04-30-2015, 09:46 AM
  #2027  
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Originally Posted by SBC_and_a_stick View Post
Not to sound like a jerk, but the only way I see this working is if there is an inherent tradeoff between downforce and cooling. If removing the duct improves both, GM would have done it. It makes no sense to make additional parts to achieve all around less output. They can sell Corvettes with or without a heat shroud. It's all under the hood anyway. It has no marketing purpose.
If you remove that duct you are essentially removing a clean, unrestricted airway, without it you will almost certainly kill front end downforce. I won't deny that it has a chance of cooling the engine compartment, but I'd rather take it easy on the throttle than mess with the aero on one the most balanced cars around.

But, in the name of science, go for it! Analysis means nothing without experimental data.
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Old 04-30-2015, 12:32 PM
  #2028  
descartesfool
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Originally Posted by soulsea View Post
Stage 4 aero with cooling pack:


C&R Racing radiator with the Denso core. I am in contact with them about their prototype C7 radiator with the same core. They are waiting fro results from the major tuning shop they sent one to.
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Old 04-30-2015, 12:52 PM
  #2029  
SBC_and_a_stick
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Honestly, how about running without a hood on? I'm sure drag is terrible but I'm sure it would fix the powersteering overtemp.
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Old 05-02-2015, 09:55 PM
  #2030  
63Corvette
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Default Overheating TODAY......at MSR Cresson

Our local club had a track day at MSR Cresson. Ambient temperature was about 82 degrees F. A C7 (Z51) M7 StingRay overheated and spit water out the overflow at the end of a 20 minute session. THEN, at the end of the next session, the driver told me that he was experiencing "significantly over 300 degrees OIL temperature..." (in 20 minutes???).
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Old 05-02-2015, 10:10 PM
  #2031  
SBC_and_a_stick
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Have them join the club. It won't be an exclusive club for long.
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Old 05-02-2015, 11:10 PM
  #2032  
ENCT
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Why post this in the Z06 section?
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Old 05-03-2015, 05:47 AM
  #2033  
descartesfool
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Originally Posted by ENCT View Post
Why post this in the Z06 section?
Because there is no Z51 section perhaps? And Z51 is a track pack and most people who post in the other C7 sections do not seem to post much about the track while lots of track related posts in this section. Maybe we need a section on called C7 on Road Racing Tracks.
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Old 05-03-2015, 08:53 AM
  #2034  
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Or negative types are drawn to the Z06
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Old 05-03-2015, 09:18 AM
  #2035  
ENCT
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With all the hype about the Z06 overheating all we need is more negative threads especially about a non Z06.
Eric
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Old 05-03-2015, 10:44 AM
  #2036  
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Old 05-05-2015, 10:56 PM
  #2037  
ncrowe
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I tried this today

Removed the duct and the hood shroud as well as the weatherstripping on the firewall. Lowered my temps 10 degrees - with ac on - 210 max temp. With AC off the temp was fluctuating between 195 and 205, would stay mostly around the 200 mark (15 - 20 degree drop).

I noticed a few really good things - first: when the fan comes on a massive amount of air comes through the hood that was previously trapped in the engine bay. Second: the air intake was cooler because the air being pushed by the fan was getting out of the engine bay.
I noticed no difference in noise, rattles, or anything like that when driving

It too a total of 5 minutes to remove the parts, and would take about 10 minutes to put back on. For the drop in temps I would say this is a good mod.

I'm going to be playing around with a few things with the car - I believe that there are a few basic and easy things that can be done to this car to keep it really cool. I have the spacers and the tank from Formatto coming and a 170 thermostat as well. E85 will be added, and maybe even some meth - this should keep this beast super cool and consistent.
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Old 05-05-2015, 11:04 PM
  #2038  
soulsea
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Originally Posted by ncrowe View Post
It too a total of 5 minutes to remove the parts, and would take about 10 minutes to put back on.
How do you remove the weatherstripping?

This is the plastic trim piece the wiper arms go through right?

Thanks.
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Old 05-05-2015, 11:13 PM
  #2039  
Flyboy22
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Originally Posted by SBC_and_a_stick View Post
Not to sound like a jerk, but the only way I see this working is if there is an inherent tradeoff between downforce and cooling. If removing the duct improves both, GM would have done it. It makes no sense to make additional parts to achieve all around less output. They can sell Corvettes with or without a heat shroud. It's all under the hood anyway. It has no marketing purpose.
I somewhat agree... Just because you can flow MORE air (potentially) by removing the ducting, the airflow is likely to be much more turbulent. The effects on drag / downforce from all that turbulent air under the hood are unknown, but I'd like to think that GM used all those wind tunnel hours for something semi-productive.

Easy enough to undo, I suppose, so try it and let us know
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Old 05-05-2015, 11:26 PM
  #2040  
C7/Z06 Man
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Originally Posted by soulsea View Post
How do you remove the weatherstripping?

This is the plastic trim piece the wiper arms go through right?

Thanks.
No, the weatherstripping is in front or on the front of the plastic trim piece the wiper arms go through. It's a soft hollow strip of black rubber that goes from one side to the other side on the top of the fire wall. The end of the weatherstripping has a hollow black rubber block covering it if I remember correctly that you can just pick up some with your fingers.

TRACK DAY STUFF:
I like the suggestion above (dmaxx3500) of wedging the rear of the hood open some for additional underhood air/heat removal. No removal of parts and very quick to return to stock; also the removing of the firewall weather stripping will do the same but no where as large of a rear opening as wedging the rear of the hood open.

Last edited by C7/Z06 Man; 05-06-2015 at 12:16 AM.
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