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View Poll Results: Upgrade first preference
Replace radiator 1 33.33%
Replace engine oil cooler 2 66.67%
Additional engine oil cooler 0 0%
Voters: 3. You may not vote on this poll

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Old 16th May 2019, 07:06 PM   #1 (permalink)
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Question Upgrade engine oil cooler or radiator first for track?

Me again...

For track use, upgrading which component is likely to have the greater reductive effect on engine temperature, the engine oil cooler or the radiator? Obviously in an ideal world, both would be changed at the same time, but I am curious to know if I decide to do one and then the other (or one and not the other), which of the two is likely to yield the colder temps and why?

I know that the engine coolant has a heat exchanger with the transmission oil, but I am rigging up a separate cooler for that as well as the rear diff.

Secondly, is it better to replace the engine oil cooler or add another somewhere else?

Also, bonus question: what is the thing that looks like a radiator directly in front of the radiator and behind the intercoolers? I briefly tried to follow the hoses to see where they went, but couldn't work it out yet. I've indicated it with the blue arrow in the attached photo.
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Old 16th May 2019, 08:56 PM   #2 (permalink)
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Old 16th May 2019, 09:11 PM   #3 (permalink)
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Ah, thanks
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Old 20th May 2019, 12:13 PM   #4 (permalink)
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Demon Tweaks currently have the Mishimoto MMRAD-R35-09 radiator with a 6% discount, which is the best price I found:

https://www.demon-tweeks.com/uk/mish...hmmrad-r35-09/

I've got the front bumper off the car, and while it wasn't the hardest job in the world, I don't particularly want to have to repeat it if not necessary, so I may do the oil cooler at the same time.

I'm wondering if I should get a GT-R specific cooler like this:

https://auto.helperformance.com/niss...ent-oil-cooler

Or a high-quality universal one like this and adapt to fit:

STD Proline oil coolers, The widest range of race proven coolers on the market! | Setrab
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Old 20th May 2019, 12:23 PM   #5 (permalink)
L6DJX is reducing weight and getting stiffer ;)
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oil cooler - all day long

speak to litcho
theirs is cheap and awesome
my oil temps hasnbt been over 95 since
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Old 20th May 2019, 12:31 PM   #6 (permalink)
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I think the Litchfield cooler is the HEL, they certainly look identical, same price too, within £5 or so.

I just got off the phone with one company I called to enquire about the Setrab coolers and they recommended I replace the OEM engine oil cooler with a Laminova oil-to-water (he confirmed replace, not add in-line with OEM).

This surprised me a little as though I have seen mention of them for applications such as the transmission and rear diff, I had never considered one for the engine oil. I'll possibly have enough buffer now with the enlarged radiator, still not sure about the idea...
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Old Today, 03:52 PM   #7 (permalink)
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Trans cooler is first concern Imo
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Old Today, 06:07 PM   #8 (permalink)
L6DJX is reducing weight and getting stiffer ;)
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trans and engine oil
depends how much track work you plan to do i guess
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Old Today, 09:55 PM   #9 (permalink)
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Quote:
Originally Posted by Cardiff R33 View Post
Trans cooler is first concern Imo
Agreed and it's in progress; just waiting for parts to arrive
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Old Today, 09:57 PM   #10 (permalink)
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Quote:
Originally Posted by L6DJX View Post
trans and engine oil
depends how much track work you plan to do i guess
My goal is to go to the Ring, not to do tons of laps, but the laps are very long compared to a 'typical' track, so one lap will equate to 7-8 laps elsewhere.
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