Need some help with this summer

Hi i need help with what cars to use this summer
I can not find a cars to get any were near wining Summer community championship and Forest monsters .
I have tried a lot of different tuning i am an ok driver .That am i doing wrong ??.
I am on a pc.

Have a read of that thread in the discussion section
People have already suggested cars and tunes there

thanks I did look at it before I asked for help I could only see what the events were . I Will look again