I found the R32,R33,R34 and the Gtr`17 all winners with minimal tuning.The R32 was a little more involved,with the R33/34 with SH is a win with only fuel stop for me,the GTR was RM.no weight reduction,body rigidity and medium rev turbo.Add a little ballast or reduce the power to get it to 600p/564hp.I ran 1st lap on FM1 then FM4 until end of lap 8,refuel and FM1 until the end.If your not in 1st by the end of lap 1 dont worry,steady wins the race most times.
My lap times are not as quick as a lot of people on here but i still manage a win,somust be doing something right.lol
Amg 45,Lancia delta,with or without engine swap,subaru imprezza 22b is another good one.Ive not had much success with RWD cars so maybe my driving style.Sorry for the ramble. 👍