Well it just depends on what you want in terms of racing competition and how much you wanna keep that f1 car from getting worse.
In most of the championships in pro league you can beat them with just about any race car (supra, nsx, skyline, vette, viper)
If the racecar is fully tuned that would help.
If you dont care about the f1 car, you can take that and whip them easily.
good luck, but if I was you, I would beat them all with the f1 real quick and then go back and have your fun racing with normal racecars... thats basically what I did.
Actually, no its not what I did... thats right, I beat the like the wind race and then used the mazda 787 which makes super easy work of them.