Not sure what the AI is doing laptime-wise. I'm currently running Sarthe I in the R89C and I'm lapping in 3'21 - 3'25 range most of the time. I'm 6hrs in and leading by 2'00 from 787B, although I've only been ahead of him for the past 3 hours. There's another R89C in the race who laps quicker than the 787B, but is pitting a lap earlier than everyone else. I'd reckon an average of 3'25 - 3'30 with an 8 lap pit schedule should do OK here, but don't quote me on that! What are you thinking of racing in? Let me know the pit schedules of the Sauber and R92CP if they're in your race.