Looking forward to hearing your results. I was formerly JB1 and had no overheating issues on the track. I went EQT Stg 1 low torque (stock IC) and high IATs put the car into limp mode over the course of numerous track days while seeing oil temps up to 265 on occasion. I would flash back to stock tune so I could finish out the sessions (benefit of not having a DP I guess!)
I am now EQT Stg 2 93 (OTS, not custom tuned), ECS FMIC, turbo blanket, wrapped APR DP and I have not had the car go into limp mode yet. I run water wetter too in my coolant (why not, right). Also, I splash in 2 gallons of E85 for track day fill-ups (per Ed at EQT's recommendation). I have only done 4 track days at this setup, and most have been fairly cool with ambient temps between 50-70. I have not had a situation where I saw over 255 oil temp with this setup. I also pull the windshield cowl gasket out for the track days to help let some heat escape the engine bay.
If heat becomes an issue during warmer months next year, I will probably switch to an upgraded IC in the stock location, grab a Mishimoto radiator, piece together an oil cooler. Or..by a sh!tbox Miata and just drive it at the track. Sure...I'll be WAY slower but I really don't want to mod the GTI more as I really like how it is right now.
Also, I picked
@Lord_Flexington's brain on what he does for his time attack car to mitigate heat and this was his list.
1. Make sure u use OEM coolant and its in good health. (it does need to be changed)
2. Have an IC i use the Ebay "majesty" oem replacement one.
3. Get a turbo blanket, brand doesn't matter.
4. Remove the foam/sound deadinging under the hood
5.Use liqui Moly 5w-40 Leitchtuft with Mos2 additive
6. Make sure ESC off is enabled and straight ahead brake stabilization are changed via OBD11 that helps keep the car from working so hard.
7. Remember to do a cool down lap as the car needs a break but so do you!
8. Also closed intake systems do run cooler at WOT. I use the USP Tearduct intake.