Hello, ive been following this thread for a while as i was struggling with this race aswell.
Im only a Driver Rating B player and the frustration was starting to set in as my best results were only in higher end of top 10.
I tried the GT-R, Viper 02, GTO 91, heck even Focus RS but was still not breaking any chance of 1st.
I can now as many others confirm the DP-100 is the car to use
Here is my setup:
ECU: 80
Ballast: 200
Ballast positioning: -50
Power restrictor: 94
Sports Hard
This makes me able to get 601bhp on the car with a 599,66 PP rating.
My biggest problem for me also was using automatic gear, after switching to manual and short shifting i was able to complete the race without pitting with still 0.7 fuel lap to go.
I won the race with +50seconds to second place and that was still with a few penalties.
The car is awesome in handling and can still hit around 310km/t on the straight.
Just remember to short shift and have patience, once youre around lap 6-7 and the AI starts pitting you will lead the race without problem.
Good luck to all.