I took my 540pp Stratos Rally car out and won... but the first field I saw wasn't the strongest. If you like, try out the tune I use.
Suspension:
RH: 95/100
SR: 9.30/12.80
DC: 6/4
DE: 4/6
AB: 5/5
CA: 0.0/0.0
TA: 0.00/0.00
BB: 5/4
Transmission:
FG: 5.000 (I think)
Max Speed to Min
1st: 3.272
2nd: 2.257
3rd: 1.665
4th: 1.296
5th: 1.053
FG: 3.375
Note: this will hit rev limiter on long home straight when in a draft, so adjust if you like.
Drivetrain: 11/25/8
Power:
100%
Stage 3 Engine
High Rpm Turbo
Body:
DF: 150/350
Ballast: 70@-50
This will get 540pp, 472hp, 331ft-lbs, 950kg's, 45/55 F/R weight dist., for a 2.01 kg/HP rating.
This setup I use to induce power sliding, and it is very stable when powering around switchback type corners. Use it to your advantage when you get used to it. Hope it helps someone out...
Cheers