Time to resurrect this thread. I just had an AI Oreca Viper do a 1:28 at Grand Valley Speedway I (last race of GT world championship amateur), after it previously in the same race had been doing no faster than 1:49s. My fastest lap in my Pennzoil Nismo was 1:47. At the end of 3 of 5 laps, it was about 3 seconds behind me, and it pitted for tyres. 'Ah, that's this race in the bag.' Or so I thought! Exactly 1 lap later, the Viper had closed all of the 25 second gap, and it was breathing down my neck on fresh tyres!
Fortunately, the boost stopped when it caught me, but it was still on fresh tyres, and my medium slicks were turning orange, literally. In the end I won, by taking the inside lines, and by ramming him into the pitlane entry

as he pulled alongside me down the main straight. But I was shaken
A 1:28, and at the same time, it lost about 5 seconds because it was driving down the pitlane as it started the lap. That's very close to F1 car speed, in a frickin Oreca Viper! All because of some weird boost the computer car gets when it's behind you?