What did your tuner set your fan settings in your road course tune? Interested in when it comes on and at what fan speed. But most of all, whether it is set to always stay on or always off when on the course at speed. My current tuner has it set to always stay on once it turns on. He states that if it is not running, the blades will block airflow. Another tuner is stating the exact opposite. He states that the spinning blades will actually do more to block airflow at higher speeds than help it. Both do not recommend the 170° Thermostat for road course work. One stated that the engine needs to be warmer due to tight tolerances. I currently have a 2014 Mustang GT with a stock engine except for a CAI and tune. Ford Racing radiator and GT500 fan. CoolTech/Setrab oil cooler and Derale transmission cooler. Yes, I track it with a 6R80 (hangs head in shame...) Upgrading soon to 2018 Manifold, L&M intake cams, OEM Boss 302 exhaust cams, billet OPGs and crank sprocket. Any input will be appreciated. Thanks!