improved engin cooling for a 993 c4
#1
improved engin cooling for a 993 c4
I live in southern California. I recently purchased a 993 c4. During the summer while in traffic the engine temperature will go up but not to the red line. I am thinking about installing the turbo front bumper with the turbo inlets where the fog lights are and the turbo rear wing/engine compartment lid to provide more room for air circulation and a fixed rear spoiler to help cool the engine. any thoughts or suggestions
#2
Rennlist Member
The stock engine cooling (oil/air) is pretty effective.
What temps are you seeing (o’clock needle position) that make you concerned? And in what circumstances? Your “not to redline” doesn’t tell us much.
First thing to do is make sure your cooling mechanisms are working properly. Does the oil cooler fan operate in high and low speeds (resistor ok?), is the oil cooler heat exchanger clean, has the engine under tray been removed?
Your fixes will not solve any underlying problem if there is one. In my opinion the turbo bumper on a NB looks great. The fixed wing is a bit of overkill.
What temps are you seeing (o’clock needle position) that make you concerned? And in what circumstances? Your “not to redline” doesn’t tell us much.
First thing to do is make sure your cooling mechanisms are working properly. Does the oil cooler fan operate in high and low speeds (resistor ok?), is the oil cooler heat exchanger clean, has the engine under tray been removed?
Your fixes will not solve any underlying problem if there is one. In my opinion the turbo bumper on a NB looks great. The fixed wing is a bit of overkill.
Last edited by mike cap; 02-09-2024 at 11:08 PM.
#3
Start with your ballast resistors and go from there.
#6
When the engine is at normal temperature, the oil temperature needle is between 8 and 9 o'clock (closer to 8 though). When I am sitting in traffic at idle and the engine heats up, the needle is at 9 o'clock. Which temperature have you seen?
#7
Rennlist Member
See here for full breakdown: https://www.pelicanparts.com/techart...20(red%20arrow).
Excerpt:
The temperature gauge is your way of knowing the temperature of the motor.
There is no water temperature gauge because there is no water so this gauge lets you know how "hot" or "cold" the motor is.
Normal operating temperature is between the two middle hash marks (yellow arrows).
While the oil is warming up it is considered good practice to keep the revs under 3500 until it clears the second line on the gauge (red arrow).
While it is perfectly alright to operate the car while the temperature is above or below the two middle marks, do not run the motor for any length of time with the gauge in the red (blue arrow).
It is not considered a good idea to let the car idle to warm it up; it can take a very long time to warm up the engine at just idle.
After you start the motor it is fine to drive the car under approximately 3500RPM until it starts to warm up.
There is no water temperature gauge because there is no water so this gauge lets you know how "hot" or "cold" the motor is.
Normal operating temperature is between the two middle hash marks (yellow arrows).
While the oil is warming up it is considered good practice to keep the revs under 3500 until it clears the second line on the gauge (red arrow).
While it is perfectly alright to operate the car while the temperature is above or below the two middle marks, do not run the motor for any length of time with the gauge in the red (blue arrow).
It is not considered a good idea to let the car idle to warm it up; it can take a very long time to warm up the engine at just idle.
After you start the motor it is fine to drive the car under approximately 3500RPM until it starts to warm up.
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#8
thanks for the responses. temps range between 8and 10 on the clock. never in the red/orange, during cool weather just below 8 than can get just below 9. never have had it yet in traffic in the summer with the a/c on. will test it this summer. thinking of still putting the turbo front bumper on with the turbo fog lights. like to look. so looks like my c4 is fine. thanks again for the input.
#9
Put the bumper on if you like the look, but it has zero affect on cooling. You need to check if your oil cooler fan is operating properly (it has two speeds). Your temp should not be getting even close to red.
#10
Rennlist Member
Agreed. And clean out dried up leaves and debris blocking the front of your oil cooler. You can peep through the front bumper.
#11
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I installed a fan override switch. Easy mod and very effective.
https://www.google.com/search?q=pors...t=gws-wiz#ip=1
https://www.google.com/search?q=pors...t=gws-wiz#ip=1
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cobalt (02-16-2024)
#12
RL Community Team
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Hi James,
If your temp gauge creeps to slightly above 9:00 when idling in traffic in hot weather this is normal. If under such conditions your oil pressure dips below 2 bar I would use a thicker oil such as a 50 weight to ensure good lubrication, Other than this I am not sure any added actions to cool the engine are required. Here is a page discussing how to read the gauges:
https://993servicerepair.blogspot.co...-leveloil.html
Andy
If your temp gauge creeps to slightly above 9:00 when idling in traffic in hot weather this is normal. If under such conditions your oil pressure dips below 2 bar I would use a thicker oil such as a 50 weight to ensure good lubrication, Other than this I am not sure any added actions to cool the engine are required. Here is a page discussing how to read the gauges:
https://993servicerepair.blogspot.co...-leveloil.html
Andy
#13
Rennlist Member
I live in southern California. I recently purchased a 993 c4. During the summer while in traffic the engine temperature will go up but not to the red line. I am thinking about installing the turbo front bumper with the turbo inlets where the fog lights are and the turbo rear wing/engine compartment lid to provide more room for air circulation and a fixed rear spoiler to help cool the engine. any thoughts or suggestions
This will not do much if anything for driving in traffic temps.
I agree with checking health of the engineered system, beginning with the ballast resistors.
You can also wire one of the fans (maybe both) so it is always on.
I did that, but it so many years ago I don't remember the details......................................................
It made a difference in traffic and track days.
There ya go, read what Chuck posted.
Craig
See post #11
https://rennlist.com/forums/993-foru...rride-mod.html
Last edited by cgfen; 02-15-2024 at 05:58 PM. Reason: Chuck's brilliance
#14
This will take care of your concerns. Cost about what a wide-body front bumper and paint would cost.
https://www.carnewal.com/products/96.../GT-Oil-Cooler
https://www.carnewal.com/products/96.../GT-Oil-Cooler
Last edited by WhiteCab; 02-15-2024 at 10:45 PM.
#15
This will take care of your concerns. Cost about what a wide-body front bumper and paint would cost.
https://www.carnewal.com/products/96.../GT-Oil-Cooler
https://www.carnewal.com/products/96.../GT-Oil-Cooler