I searched and didn't see a thread on this. I just spent two days at Willow Springs and didn't hit limp mode at all. Last time out I hit limp mode on the last lap of each session. The temps were cooler this weekend and I was slower (Hopefully due to worn out tires). I did get up to 261 at the end of most sessions so I was close. Nevertheless, the scoop does seem to help although it does not appear to be a permanent solution.