Well i tracked my Car 2 weeks ago with the next mods:
Adittional water radiator from ppk1
335is ducts, so both coolers really get some air and an intercooler upgrade..
I was able to do 40 laps to the track (3 laps wot, 1 lap to refrigerate the Car and stopping for 15 mins every 12 laps) an the car behaved like a champ... Didn't say a word...
I did all these upgrades bc last time i was there i couldnt enjoy it because it overheated too fast...
I dont have the rad, but i think is not necessary for track use (over 40 mph the air will come fast enough anyway)
Mine is a n55, but i think pretty much everything i said is valid for an n54.
Hope it helps!
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