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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Engine, Exhaust, Transmission (https://www.ft86club.com/forums/forumdisplay.php?f=8)
-   -   Engine Cooling options (https://www.ft86club.com/forums/showthread.php?t=129585)

Magiclow 08-13-2018 11:28 PM
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!

humfrz 08-14-2018 12:23 AM
Quote:
Originally Posted by Magiclow (Post 3121216)
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 08-14-2018 12:56 AM
250 oil or coolant temp?

Magiclow 08-14-2018 11:27 AM
Quote:
Originally Posted by norcalpb (Post 3121237)
250 oil or coolant temp?
Oil Temp, I saw it on my Openflash tablet

Tcoat 08-14-2018 11:34 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 11:35 AM
Max Temp
 
What is the safe maximum, constant, (lap after lap) oil temp for the twins on the track with thicker track oil ?
:iono:

Tcoat 08-14-2018 11:39 AM
Quote:
Originally Posted by RFB (Post 3121344)
What is the safe maximum, constant, (lap after lap) oil temp for the twins on the track with thicker track oil ?
:iono:
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 11:44 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 11:58 AM
Quote:
Originally Posted by Trueweltall (Post 3121348)
  • 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 12:21 PM
Quote:
Originally Posted by Magiclow (Post 3121341)
Oil Temp, I saw it on my Openflash tablet
Oh, I thought you were talking about coolant temperature - :bonk:


humfrz

Trueweltall 08-14-2018 12:33 PM
Quote:
Originally Posted by RFB (Post 3121354)
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 12:56 PM
Quote:
Originally Posted by Trueweltall (Post 3121369)
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.
:cheers:

norcalpb 08-14-2018 01:31 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 02:04 PM
i don't think i would use 0w20 on the track m8.


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