I have a >90% hot driver, level 18 only. What I did is:
- use Soft Sport tyres, cancel all pitting during race.
- Use any Honda NSX. I tried on Mobil 1 NSX, Takata Dome '06 NSX
- Upgrade to Stage 2 Turbo = 594-596 PP
- Transmission tune down to 320-330.
- Then change the aero-downforce to 38-63 , or whatever number to balance up until PP=600
- RACE !

Lap 1:
Push the driver to overtake or speed up all the way. By end of lap 1, you should be in position 6-9.
Many cars will pit, and you will go up to position 4-6.

Lap 2:
Keep pushing at max red-hot level, until overtake the first car. Then pace normal at 60-80% at a 3-5 seconds distance. You don't need to push max, as level 18 driver skills still not good.

Lap 3:
The drivers will catch up if your driver is low level like this one. This is where you need to maintain 80%-100% at the first half of the lap.
After the Carousel, there are a few corners you can go wide, before you reach the long straight. Maintain it at 50-70%.
One important point is, don't let them tail you, for the drafting effect. Keep a slight distance.
Once reach long straight, push max to 100% all the way.
Can win by 2-10 seconds.

My driver jump from level 18 -> 28 with 200%
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For several other drivers at level 37-38, I use Racing Hard to start.
- Then pit for Intermediate for the remaining two laps, or
- Just keep driving using Racing Hard.

Push 9 9 all the way. 3rd lap after Carousel still go wide at certain corners. Intermediate tyre degrade very fast when wetness <20%.
Can win by 30-40 seconds.