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Discussion Starter #1
Hi,
Does anyone know if oil flow to the engine oil cooler is operated thermostatically, or it is always flowing through?

Thanks
Ben
 

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Discussion Starter #3
Thanks Skint.
I have been considering putting an electric fan on the back of it for use at low speed or in the pits to cool it down, but worried that it will restrict air flow when the car is moving quickly.

Has anyone done this? Any advice?
 

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First thing would be an upgraded core.
 

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Coolio. Heat is the biggest negative to the R35 on track. I've added both the Litchfield cooler and a bigger water radiator in the hope it'll prolong the time until heat saturation occurs.

That said I'm not expecting a huge improvement though. It'll just delay the inevitable.

The factory lines are behind the core so I'm not sure you'd be able to fit a fan in and if you could I'd question how effective it might be given it's size. I know some tuners run two cores to try and reduce temps.
 

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Discussion Starter #7
Yep I have done the same, got a better cooler and bigger rad but as you say it just delays it a bit longer.
I have seen the AMS guys use another cooler on the passenger side linked across the front as well as using a small electric fan on the back.

I am going to try it, as I think that when I am letting it cool down in the pits (engine running) it will speed up cooling time and maybe I will not need the heater on full blast!

Thanks for the response Charlie
 

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Coolers

Would it not be worth assessing the cores you have in both radiator and oil cooler to see if theres more efficient cores out there?
 

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Coolio. Heat is the biggest negative to the R35 on track. I've added both the Litchfield cooler and a bigger water radiator in the hope it'll prolong the time until heat saturation occurs.

That said I'm not expecting a huge improvement though. It'll just delay the inevitable.

The factory lines are behind the core so I'm not sure you'd be able to fit a fan in and if you could I'd question how effective it might be given it's size. I know some tuners run two cores to try and reduce temps.
No idea if it would even be feasible but I've wondered what routing the AC through a heat exchanger with the oil would do? I think to have an impact you'd have to pre cool some water then save it for when the engine oil temp hits a level deemed on the limit so let the rads take as much strain as possible then get very cold water involved on demand to try to take only the excess heat away. Probably wouldn't buy you enough to be worth the effort though.
 

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Guys I track my car a lot and in very hot climate down south of Spain , some days over 40 deg C , all you guys saying helps a lot to cool down and prevent heat soak , I use on my car an upgraded Forge water rad a second inline engine oil cooler , all this will help but nothing beats having (mine is ) a Forge trans cooler which I use a manual on switch (at 80 deg C put it on) and I can track car 20 min hard with temps always staying below or max 120 deg C . As you cool down your trans oil , which is cooled be rad water you will keep water and oil temp really way down . When I have tracked my car in UK with its much colder temp I could keep going much much longer and temps would not raise at all . My car is tracked min 700 bhp and max 1100 bhp , as long as trans pump keeps working your perfect , if it fails which mine has after 3 years I can do 4/5 laps max before needing to cool down , from experience of tracking my Gtr over 6 years nothing beats a trans cooler , hope this help any of you .
 

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Been running a trans cooler for 6 years on track and it helps with trans cooling certainly. By adding another cooling radiator you are reducing the effect of trans fluid temps on overall temps but in my experience oil and water temps still get excessive. Heat soak is inevitable in the R35 all you do is delay it.
 

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Guys I track my car a lot and in very hot climate down south of Spain , some days over 40 deg C , all you guys saying helps a lot to cool down and prevent heat soak , I use on my car an upgraded Forge water rad a second inline engine oil cooler , all this will help but nothing beats having (mine is ) a Forge trans cooler which I use a manual on switch (at 80 deg C put it on) and I can track car 20 min hard with temps always staying below or max 120 deg C . As you cool down your trans oil , which is cooled be rad water you will keep water and oil temp really way down . When I have tracked my car in UK with its much colder temp I could keep going much much longer and temps would not raise at all . My car is tracked min 700 bhp and max 1100 bhp , as long as trans pump keeps working your perfect , if it fails which mine has after 3 years I can do 4/5 laps max before needing to cool down , from experience of tracking my Gtr over 6 years nothing beats a trans cooler , hope this help any of you .
My self and Adam have similar trans coolers, I believe Adam stayed below 105 deg C at Spa in a session that used a whole tank of fuel, ive not had a chance to use mine in anger, both use a gear pump and fans my temp switch is 93 degree.
 

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Coolers

As I meantion before on 4 trackdays I have done in UK , 2 at silverstone and 2 at Castle Coombe water temp just at 95/100 and trans never over 110 , engine oil around 90/92 , its really cold there , down south Spain and portugal we get over 40 C and car max trans wont be over 120 , in Spa and Hockenhiem or anywere in Germany as you say it stays cold , Forge auto switchs on at 104 so I just manually switch on at 80 . If the trans pump fails or forget to switch on I can do like 5 laps max and trans temp will be going up from 130 , for me its the best upgrade ever but I have everything upgraded .
 

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As I meantion before on 4 trackdays I have done in UK , 2 at silverstone and 2 at Castle Coombe water temp just at 95/100 and trans never over 110 , engine oil around 90/92 , its really cold there , down south Spain and portugal we get over 40 C and car max trans wont be over 120 , in Spa and Hockenhiem or anywere in Germany as you say it stays cold , Forge auto switchs on at 104 so I just manually switch on at 80 . If the trans pump fails or forget to switch on I can do like 5 laps max and trans temp will be going up from 130 , for me its the best upgrade ever but I have everything upgraded .
I was getting 130+ at brands and Dunsfold so hope this will prove to be useful and I can market it, even having my own design sump made in billet.
 

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Whats mods have people done to the forge gearbox cooler to keep temps down. I still find temps rise quickly.
 

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Whats mods have people done to the forge gearbox cooler to keep temps down. I still find temps rise quickly.
I made my own kit, same as Adams (Charles Charlies) and he does not go over 105 at Spa.
 

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Whats mods have people done to the forge gearbox cooler to keep temps down. I still find temps rise quickly.
Back in 2012 I added an SSP front mounted trans cooler to deal with the high temps I was experiencing on track. Back then trans fluid cost the earth and Nissan said it has to be changed if it exceeded 120 degrees.

Now I'm not sure I'd bother with a trans cooler as much. Fluid like FFL4 can be had for £300 for 20 litres (enough for two trans fluid changes) so even if your Forge cooler is performing as badly as I know and expect it too, it's not as big a deal as it once was.

As an aside I'd be checking your fluid pump is still working within spec, that the supplied temp switch operates at the correct temp, and failing that I'd install an override switch so you can run the cooler pump from the moemnt you leave the pits.

My trans fluid has never exceeded 110 since my kit was installed. That's including some very heavy duty track days during the height of summer.
 
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