ECUflash Fan Temp Controls

[99OZDSM]

I've been thinking about ways to increase the overall thermal efficiency of my cooling system. I understand ducting will reap the largest benefits, which is a project I am planning later on. Along with an Andrew Brilliant designed vented hood from Carbonetics.

I was wondering if lowering the temperature that the main fan turns on would be worth it? Below is a snapshot of my options in ECUFlash/Ceddymods. It looks like the main fan turns on at 204.8 F and has a "high setting" that turns on at 212 F. Am I reading this chart right? What does High Off mean?

Would it the be beneficial to adjust my AC Fan temps lower so that I have two fans on at say, 204.8 F?

What does everyone else do? My car is a street/autox build for reference.

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[Mello]

Our motors are designed to run around 200²F±10²F. Unless you're have high temp problems I would leave the ECU setting like they are. The AB hood will increase the pressure differential across the radiator making it work more efficiently.

 

[stillrunning]

Do you have a cooling issue.
High Off is the temperature that High mode will stop.
The engine temp is largely controlled by the coolant thermostat, if you have a lower temp thermostat you would then consider lowering the fan on/off temps.
And if I'm not mistake with ECUFlash you want to make sure your engine gets up to 180+ for LTFT control to function, if that matters to you.