Oh Ok! You'll be just fine then, Don't make them to powerful, Try and stay under 2000HP, I Stay under 1200! Concentrate on The Downforce and Grip Settings, Those will make drastic Handeling and Stopping power in the game, Not to much Grip though! That would make the game Jump to much and appear erratic at times, Also Change the suspension to that of a F1 Car, Seems to work pretty good for me.
Grip- FT=356
Grip-RR=360
Downforce=FT-292
Downforce=RR-296