ABS print test with Fan on/off

Googling around I did not found straight answer how print fan affect ABS prints. So I made calibration figure and printed it out with fan on and off. G-code was modified to change hotend temperature during print.
Conclusion was then using fan hot end temperature should be significantly higher (260 instead of 230). Printing with high temperature and fan on helps for better bridging and keeps layers stronger together.
Probably my conclusions is subjective but this experiment gave me answer I w