Installed a 180 degree T-Stat in my 2015 Hellcat. After the install I calculated the following values
- Low Speed ECT - 185
- Med Speed ECT - 194
- High Speed ECT - 194
This was based on some trainings from The Tuning School books/videos as well as scouring YouTube and also on these forums (did quite a few searches, most results were jeep related).
I applied these values to the following Modes:
- High Vehicle Speed Mode
- Low Vehicle Speed Mode
- A/C On
Here is a screen cap of the System -> Fans section as it currently sits in the tune:
tune.jpg
So from start of the car until 221 degrees the PWM did not change. When it did change it was too little too late. Coolant expanded that it hit overflow.
tune_pwm change.jpg
Wasn't happy that I need to clean this...
coolant_spill.jpg
Checked the hose and tried to squeeze it, wasn't fungible which means the T-Stat opened and coolant was flowing. However the fan didn't turn on till later. My expectations were that once the tune was adjusted and the temperature was detected the fans would immediately turn on and begin cooling the vehicle. I decided to go for a drive, get some data and see what is going on.
Are my expectations wrong? Anyone wanna school me on how the cooling system works in these cars? Why don't I see 185? Could I have a bad t-stat? I did notice that while driving on the highway under no load the temps they stay below 194 and do hit 185 on a long stretch. Did I miss something to adjust in the tune? What have you guys done to adjust the tune for the T-Stat. I've attached my tune and my log file just in case anyone can do a mini dig and find something I didn't do right?
23-AUG-20_READ.hpt
debugging_ect_fan_pwm_tstat.hpl