What car are you running with?
I managed to win the race in the Concept viper using pit strategy.
Like the Wind - Professional:
I jumped in the Viper GTSR Concept (won from License tests). Full suspension, stage 3 NA tune up, Full racing tranny and headed off to the Like the Wind race You may want to run Super hard slicks, as I ran on Medium. This would eliminate the only pit stops you have to do. Pitting here is tough, as you're threading a needle at nearly 200mph.
I pitted on Lap 10, with red tires
AI Pitted on Laps 5, 10 and 15
Viper GTS: + 15.483
Skyline GT-R V spec (R34): +1 lap
Castrol Toms Supra: + 2 laps
Esprit Sport 350: + 5 laps
Zonda C12S: + 6 laps
Best Lap: 141.621
Total Time: 3432.422
Average Lap: 1'43.621
It was a tough run, as the viper was in the lead most of the time, Pit strategy allowed me to win. I unfortunately didn't write down what my set-up was. Likely bottom out the suspension, ASM = 3; TCS = 1, and adjust Autosetting up to ?? It wasn't set at full widest, I think a bit below that. Adjust it, until you hit lap times similar to mine, and pit at the right time, and you should win easily
This netted me 10,000cr and the 787B!