C5 Supercharged Overheating
Thread Starter
Instructor
Joined: May 2006
Posts: 129
Likes: 0
C5 Supercharged Overheating
I would like your views guys.
I have a c5 fully forged 6.3 litre with DISC head unit and twin intercoolers.
I have heavy duty aluminium radiator with inbuilt oil cooler. Normal driving even in extreme temperatures and AC on never a problem even if I idle for 30 minutes it DOES NOT overheat.
BUT if I track the car ...after a about four or five 1.5 mile laps flat out the water temperature rises to boiling point. If I then do a cool down lap the temperatures come down very quickly.
The temperature comes down fast and I am ready to go again.
Would this be due to the inbuilt oil cooler putting heat into coolant.
Should I disconnect THE INBUILT OIL COOLER and fit a seperate oil cooler. Does anyone else think along this line???
I would welcome your thoughts.
I have a c5 fully forged 6.3 litre with DISC head unit and twin intercoolers.
I have heavy duty aluminium radiator with inbuilt oil cooler. Normal driving even in extreme temperatures and AC on never a problem even if I idle for 30 minutes it DOES NOT overheat.
BUT if I track the car ...after a about four or five 1.5 mile laps flat out the water temperature rises to boiling point. If I then do a cool down lap the temperatures come down very quickly.
The temperature comes down fast and I am ready to go again.
Would this be due to the inbuilt oil cooler putting heat into coolant.
Should I disconnect THE INBUILT OIL COOLER and fit a seperate oil cooler. Does anyone else think along this line???
I would welcome your thoughts.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
When you say a heavy duty radiator, is it a Dewitt's, Ron Davis or something else? Have you done all of the basic checks such as: do have the air damn, have you checked for trash up in the front and between the condenser and radiator? What's your mix of coolant to distilled water?
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
You would want a radiator without the built-in oil cooler. Disconnecting the lines and going with an external may help but the additional fluid of a dedicated coolant only will do better.
Questions:
Do you have a shroud directing/trapping air through the radiator instead over or through the sides?
Do you have the lower air dams?
Arnel
Questions:
Do you have a shroud directing/trapping air through the radiator instead over or through the sides?
Do you have the lower air dams?
Arnel
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
I would like your views guys.
I have a c5 fully forged 6.3 litre with DISC head unit and twin intercoolers.
I have heavy duty aluminium radiator with inbuilt oil cooler. Normal driving even in extreme temperatures and AC on never a problem even if I idle for 30 minutes it DOES NOT overheat.
BUT if I track the car ...after a about four or five 1.5 mile laps flat out the water temperature rises to boiling point. If I then do a cool down lap the temperatures come down very quickly.
The temperature comes down fast and I am ready to go again.
Would this be due to the inbuilt oil cooler putting heat into coolant.
Should I disconnect THE INBUILT OIL COOLER and fit a seperate oil cooler. Does anyone else think along this line???
I would welcome your thoughts.
I have a c5 fully forged 6.3 litre with DISC head unit and twin intercoolers.
I have heavy duty aluminium radiator with inbuilt oil cooler. Normal driving even in extreme temperatures and AC on never a problem even if I idle for 30 minutes it DOES NOT overheat.
BUT if I track the car ...after a about four or five 1.5 mile laps flat out the water temperature rises to boiling point. If I then do a cool down lap the temperatures come down very quickly.
The temperature comes down fast and I am ready to go again.
Would this be due to the inbuilt oil cooler putting heat into coolant.
Should I disconnect THE INBUILT OIL COOLER and fit a seperate oil cooler. Does anyone else think along this line???
I would welcome your thoughts.
How much boost do you run ??? Sounds like the shrouding around the radiatoris missing ?
Also what is the mix of collant that you're running ?? A higher water content mix will aid in cooling.
Thread Starter
Instructor
Joined: May 2006
Posts: 129
Likes: 0
Thanks for you feedback guys.
I have the air dams on and I am running a RON DAVIS radiator. Boost is low ..8 pounds.
I have changed coolant to water mix but it has not made a difference.
1.I will make side shrouds so air is directed only through radiator .
2. Seal the sides of condensor to sides of radiator to stop air flow loss.
I will try these mods and post again.
I have the air dams on and I am running a RON DAVIS radiator. Boost is low ..8 pounds.
I have changed coolant to water mix but it has not made a difference.
1.I will make side shrouds so air is directed only through radiator .
2. Seal the sides of condensor to sides of radiator to stop air flow loss.
I will try these mods and post again.
