Engine Cooling options - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Magiclow · 08-13-2018, 10:28 PM

Hello

I have been taking my car to the track and I have couple questions on engine cooling.

1. after 4 laps the car is at 250 degrees, I don't know if its too hot or not, can somebody tell me @ what temp will it become an issue for our engine?
2. if cooling is needed, should I be looking at a upgraded radiator as well as an oil cooler? what other options do I have?
3. also what brand do most people recommend?

Thank you for your help!

humfrz · 08-13-2018, 11:23 PM

Quote:

Originally Posted by Magiclow

Hello

I have been taking my car to the track and I have couple questions on engine cooling.

1. after 4 laps the car is at 250 degrees, I don't know if its too hot or not, can somebody tell me @ what temp will it become an issue for our engine?
2. if cooling is needed, should I be looking at a upgraded radiator as well as an oil cooler? what other options do I have?
3. also what brand do most people recommend?

Thank you for your help!

Here are my thoughts for you, till someone comes along that knows what he is talking about.

The coolant temperature at 250 degrees F should be OK, as long as the coolant hasn't reached its boiling point. The boiling point is determined by the coolant composition and the pressure the coolant is under.

So, with a coolant mixture of 50/50 water/ EG, and at a pressure of 15 psi, the engine should be OK running at 250 degrees F.

However, I wouldn't run an engine too long at that temperature.

Wait - someone is coming along -

humfrz

norcalpb · 08-13-2018, 11:56 PM

250 oil or coolant temp?

Magiclow · 08-14-2018, 10:27 AM

Quote:

Originally Posted by norcalpb

250 oil or coolant temp?

Oil Temp, I saw it on my Openflash tablet

Tcoat · 08-14-2018, 10:34 AM

You need to get that oil temp down. The rad is probably fine.

Give this a read http://www.ft86club.com/forums/showthread.php?t=114293

RFB · 08-14-2018, 10:35 AM

What is the safe maximum, constant, (lap after lap) oil temp for the twins on the track with thicker track oil ?

Tcoat · 08-14-2018, 10:39 AM

Quote:

Originally Posted by RFB

What is the safe maximum, constant, (lap after lap) oil temp for the twins on the track with thicker track oil ?

250 would be "safe" but if you are hitting that high on a regular basis then you are running the risk of going over which could be a problem.

Trueweltall · 08-14-2018, 10:44 AM

100-169F Warm Up Phase, high oil pressures
170-189F Near Operating temps, oil pressures still higher
190-225F Normal Operating Range, oil pressures normalize
225-245F Middle End of operating range for track use, 5% drop in oil pressures
245-255F Upper End of operating ranges for track use, 10% further drop in pressures on 0w20
255-265F Red Zone of operating ranges for track zone, 0w20 starts to thin, oil pressures drop to questionable range.
265F+ Playing with fire on 0w20

RFB · 08-14-2018, 10:58 AM

Quote:

Originally Posted by Trueweltall

100-169F Warm Up Phase, high oil pressures
170-189F Near Operating temps, oil pressures still higher
190-225F Normal Operating Range, oil pressures normalize
225-245F Middle End of operating range for track use, 5% drop in oil pressures
245-255F Upper End of operating ranges for track use, 10% further drop in pressures on 0w20
255-265F Red Zone of operating ranges for track zone, 0w20 starts to thin, oil pressures drop to questionable range.
265F+ Playing with fire on 0w20

Thanx !
What kind of oil pressure drops (in psi) are you seeing at high temp with 20 ?

humfrz · 08-14-2018, 11:21 AM

Quote:

Originally Posted by Magiclow

Oil Temp, I saw it on my Openflash tablet

Oh, I thought you were talking about coolant temperature -

humfrz

Trueweltall · 08-14-2018, 11:33 AM

Quote:

Originally Posted by RFB

Thanx !
What kind of oil pressure drops (in psi) are you seeing at high temp with 20 ?

Once I hit 240 with 0w-20 my oil pressure at idle is almost nonexistent on the gauge, it's in the single digits and sets off the warning light.

RFB · 08-14-2018, 11:56 AM

Quote:

Originally Posted by Trueweltall

Once I hit 240 with 0w-20 my oil pressure at idle is almost nonexistent on the gauge, it's in the single digits and sets off the warning light.

Thanx, wanted to set my oil pressure alarm, 0 was the default on the gauge, and an alarm at zero is to late - lol.

norcalpb · 08-14-2018, 12:31 PM

I hit 250 on every run at Laguna last weekend with my Forester XT oil cooler.

Sounds like we both need something more heavy duty.

re-animator · 08-14-2018, 01:04 PM

i don't think i would use 0w20 on the track m8.

08-13-2018, 10:28 PM	#1
Magiclow Member Join Date: Jul 2014 Drives: 2013 Ultramarine Blue FRS Location: Markham Posts: 91 Thanks: 35 Thanked 22 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Engine Cooling options Hello I have been taking my car to the track and I have couple questions on engine cooling. 1. after 4 laps the car is at 250 degrees, I don't know if its too hot or not, can somebody tell me @ what temp will it become an issue for our engine? 2. if cooling is needed, should I be looking at a upgraded radiator as well as an oil cooler? what other options do I have? 3. also what brand do most people recommend? Thank you for your help!

08-14-2018, 10:34 AM	#5
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,283 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	You need to get that oil temp down. The rad is probably fine. Give this a read http://www.ft86club.com/forums/showthread.php?t=114293 __________________ Racecar spelled backwards is Racecar, because Racecar.

08-14-2018, 10:35 AM	#6
RFB Senior Member Join Date: Aug 2013 Drives: FRS Location: Canada Posts: 936 Thanks: 145 Thanked 422 Times in 289 Posts Mentioned: 8 Post(s) Tagged: 1 Thread(s)	Max Temp What is the safe maximum, constant, (lap after lap) oil temp for the twins on the track with thicker track oil ?

08-14-2018, 10:44 AM	#8
Trueweltall Senior Member Join Date: Feb 2016 Drives: 2016 Subaru BRZ Location: Florida Posts: 394 Thanks: 91 Thanked 195 Times in 115 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	100-169F Warm Up Phase, high oil pressures 170-189F Near Operating temps, oil pressures still higher 190-225F Normal Operating Range, oil pressures normalize 225-245F Middle End of operating range for track use, 5% drop in oil pressures 245-255F Upper End of operating ranges for track use, 10% further drop in pressures on 0w20 255-265F Red Zone of operating ranges for track zone, 0w20 starts to thin, oil pressures drop to questionable range. 265F+ Playing with fire on 0w20

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08-13-2018, 11:56 PM	#3
norcalpb Senior Member Join Date: Oct 2013 Drives: 2013 BRZ, 2023 Model 3 Location: SF Bay Area Posts: 2,296 Thanks: 1,212 Thanked 861 Times in 570 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	250 oil or coolant temp?

08-14-2018, 12:31 PM	#13
norcalpb Senior Member Join Date: Oct 2013 Drives: 2013 BRZ, 2023 Model 3 Location: SF Bay Area Posts: 2,296 Thanks: 1,212 Thanked 861 Times in 570 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I hit 250 on every run at Laguna last weekend with my Forester XT oil cooler. Sounds like we both need something more heavy duty.

08-14-2018, 01:04 PM	#14
re-animator Senior Member Join Date: Jul 2017 Drives: 2013 BRZ Location: San Diego Posts: 213 Thanks: 135 Thanked 83 Times in 45 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	i don't think i would use 0w20 on the track m8.

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