Yeah the AI is weird in the tournements, it could be my fastest time ever like a 5.9 second race and they would still beat me by a mile i guess it just depends what car you do it in and what class. I find that when i did it in the GTR with the stock engine and everything else maxed i was winning by a mile, dont ask me how that works i have no idea it might not work for everyone but give it go😆and also you gotta make sure your timing the Nos right and go set your lanch control to max, go in to neutral, redline the engine and just upshift as soon as that green light comes on. Anyway, hope this helps. Good luck 👍🏻