I have an awesome Jaguar C-X75 tune up on my profile suitable for all types of races. Typically this car would not do that well but this one handles more like a Centenario. As a bonus the car itself has many perks to get ahead in the game.
Testing it out (last couple laps are good) running as fast as the 911 and 918
Ferrari 288GTO Rally S1 Class
This is a mean lean rally machine and got a big up in performance since last game.
911 4.0 Rally S1 Class
This is also pretty good, but a bit harder to drive
Ferrari 360CS S1 Class Grip
Really good street racer. One of the best handling. Seems better than H3 by quite a bit.
812 Superfast S1 Class
Still tweaking this one but feels good.
911 GT3RS 16’
The graph gives this a 10 rating in every category except speed at 9.4 much like the 918. It absolutely rips through corners. The main thing I did with this one is lower it down and stiffen it up so it feels more like a hyper-car. 911 GT3 RS 16' - Holyrood Park Circuit - YouTube
918
This is still the best car I’ve driven. Feels about the same as H3. Minor handling adjustments and I optimized the gears.
Enjoy these, I wont do many tunes beyond these because I dont typically tune cars I dont drive.