To prevent that other people gets as frustrated as I have been for the last weeks playing this game, I think that there should be a sticky thread informing about the engine mapping bug. In short: In order to get engine mapping = fast, you need to have it on standard in the garage, and change it to fast when on the track. If set to fast in the garage, it will allways be on standard (even if you change it to fast out on the track). As I understand it, the bug is for all formats (PS3, XBox, PC) and also in all driving modes (TT, race, practice etc) I belive. Engine mapping = fast is like getting +100ps. I would say you gain at least 1 sec per lap. For example at Monza, if you run in standard and your ghostcar is on fast you are one full dot behind on the minimap allready at the first chicane. Before I realized this, I was really frustrated. I hade some setups saved with engine = fast, and some with engine = standard (which I then changed out on the track). My performance on different tracks were so different from day to day. Sometimes, no matter how hard I tried, I was more than one second slower than the day before. Sometimes when doing minor changes in the setup, the car was all of a sudden much slower on the straights. Or faster. Nothing made sense. Until I found out about the bug. I have not raced online, but if the bug is there as well, knowing about this bug, and you opponents not, would be like participating in the special olympics without beeing handicaped.