Originally Posted by Bimmer07
thanks nema im guess ill pm him!
This may help, ever since I touched E85 I haven't gone back to straight 91. I may just for winter and run OTS S1 Drive.
As AEnema said, ACN 91 just isn't enough to run S1 sport. However log and post so we can see. My issue was due to high IATs, inter cooler Air Temps. Which resulted in timing pulls. In winter we may be ok with the cool air.
Read this thread it will help you to understand how and to read logs. The timing corrections section were based upon my logs.