1. Lower the car all the way.
2. Zero camber angle and Toe settings.
3. The minimum amount of downforce that you can get away with.
4. Set your gears so that you hit redline at the end of the longest straight.
Uhh, the Escudo isn't the best car in my opinion, but it can get pretty fast...and it doesn't go the fastest in the game either...
What boom said is pretty much it, if you want a good speed with still a good acceleration, auto setting 35 lines up 6th gear right in the top corner, but again, it depends on what car and track you're on...