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Old 6th June 2006, 06:49 PM   #1 (permalink)
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Trackday Coolant Temps

I was interested as to what coolant temps people experience when running on track days.

Ran my car for 5 laps on Sat and it hit 98c!!

Ambient was about 20c and I was running 1.5bar boost

Any thoughts
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Old 6th June 2006, 07:21 PM   #2 (permalink)
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104C at Snetterton (500PS). Ambient of 15C
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Old 13th June 2006, 11:35 PM   #3 (permalink)
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bear in mind I was not running std cooling system since day 1.. all track days where done for 30 mins each session for 6 sessions. and this is only a review on temps nothing else.

1st track day ( Greddy sorry to say crap 3 core radiator no offense to anyone who got one)
Ok 38C Temps
100 water
110C Oil
Stop the bloody car

2nd track day (custom radiator, water thermostate, new cooling fan)
35c temps
water 97c
oil 100c

3rd track day (MAJOR changes in radiator 3 core custom aluminum, and invested in a 2nd oil cooler revised air flow to coolers aka cutting a hole in the front bumper, new radiator fans, and a custom pulley for the water pump to increase water flow, which worked really well but shortens the life of your water pump)
36C Temp
Water 89C
Oil 93C

Getting somewhere yes indeed I am sure the temps will be lower now as I just finished a new engine and its running much much cooler than the old setup so hopefully I am aiming at Mid 80C for both water and oil very possible. give ne 20C weather and I will give you 50C oil n water
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Old 14th June 2006, 06:25 PM   #4 (permalink)
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Hi Mo.
Sounds like some of the contents of that big mail I sent you have come good then?
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Old 15th June 2006, 07:42 AM   #5 (permalink)
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BBD,

where did you get the Custom aluminimum radiator in Dubai?
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Old 15th June 2006, 09:58 AM   #6 (permalink)
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I like to see a max of 95 C water temps and a max oil temp of 120 C To get water temp that low needs a cooler stat and the engine driven fan and stock ducting, and, on a hot day, a better rad. On a GTS-t running 380HP it takes a 34 row oil cooler, on -12 hoses, but on a GTR, bigger still, as the front diff adds a lot of heat to the sump oil.
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Old 15th June 2006, 10:20 AM   #7 (permalink)
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tacker BBD,

where did you get the Custom aluminimum radiator in Dubai?
Find the core size you need and end tanks can be made at any local radiator shop.
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Old 15th June 2006, 01:14 PM   #8 (permalink)
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water spray on the intercooler/rad would help?

rigged up to a nitrous microswitch to run at WOT?, would use a bit of water but it would decrease temps i assume?
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Old 15th June 2006, 03:45 PM   #9 (permalink)
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realisticly speaking how much water you planning on spraying on the I/C or Radiator, if you can not keep temps of oil and water down something is wrong with your cooling system Water spray is not a solution.

seen some GTR's around Dubai latley with electric water pumps they say its working very good but unless you actually physicaly take a car on the track you have no way of knowing if what you have done actualy works for track days.
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Old 15th June 2006, 05:55 PM   #10 (permalink)
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Water spray is frowned on or even barred at a lot of track days, in case something ruptures and the dry track is suddenly wetted.
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Old 16th June 2006, 01:32 PM   #11 (permalink)
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i tend to run quite hot after a good blast in my gtr as it is an import with no oil cooler fitted. So i make sure i use oil that is rated at a higher temp and spend a bit more time warming her up and cooling down. No probs as yet
i dont do trackdays tho
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Old 16th June 2006, 03:21 PM   #12 (permalink)
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Chris, any feeling on co2 spraying at trackdays? I'm guessing the same frowning as water? I was considering adding a system, perhaps just to give it a good squirt just prior going out.

Jon
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Old 16th June 2006, 04:29 PM   #13 (permalink)
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CO2 is probably fine, as it is going from a liquid to gaseous state, so can't "wet" the track.
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Old 17th June 2006, 09:12 AM   #14 (permalink)
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Porkers LMGT2 at Lemans cooling.




As you can see Radiators are small Oil coolers hidding, talking to one of the tech people and saying to me basicaly airflow to the coolers are > size, I have also seen the Saleen with all the engine bay bars etc with goldish paper wraps and no one is using either co2 or waterspray
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Old 18th June 2006, 11:38 PM   #15 (permalink)
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15 degree C ambient

75 degree C after 10 laps

Less than 700hp

Trust 12 row oil cooler
Yashio 3 core radiator
Sard overflow tank
1.3 bar radiator cap
Billion 65 degree thermostat

Without above (ie stock) water temps were hitting 84 degrees C at 20 degree C ambient temps.

Also car has no A/C so no condensor in the way so thats prob worth 5-10 degree's C

Radiator upgrade also gave me torque increase !!
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