I have taken car to drift training and testing event on friday, had great time there and here are some overviews.
I drove car to and from event (150km each way) and made another 200km on the track.
First tests week ago in warmer (20C) day showed EWP should run at constant full speed, no need to regulate it. However, friday morning when i took of towards track, temperature was around 5C and whole trip to the track (no boosting, but high speed) my temperatures were too low in 60-70C range and i definately should have taken controller with me.
Return trip was in afternoon, warmer (around 15C) and coolant temps without controller have not dropped under 75C and aweraged at 83C. My efan starts at 90C, shuts off at 85C and highest temps on the way back i have seen were 91C.
On the track data for 30min run
Coolant lowest 84C, highest 96C, awerage 86C.
Oil temps in 80C-100C range
Intake air temps highest 37C, awerage 34C
I was boosting only to wastegate spring which is 8 psi, but wastegate is leaking (exhaust manifold too

and does not hold the pressure in higher rpm's.....
I probably might get coolant temps more stable with controller and controlling efan with Haltech PWM instead of On/Off switch, but its not that bad already
Overall good feeling from first drifts with the car, still a lot of things to tweak and fix, but EWP works and for summer / racing i wont need the controller, but for trips to track i should connect it.
Hotter days and smaller track will tell us more...
Pics and videos already somewhere in Facebook, hopefully will have some linkable here to forum.