Street cars
- Start with camber.
Maximize negative front camber on street cars. They are limited anyway for track use and the more you can use (negative) the better.
- Lower tyre pressures.
For track use I suggest pressures under 30psi, even under 25 psi for very light cars. Don't overdo it, it won't pay. I'd go 25-27 for heavy cars, 22-25 for light cars.
Play with a difference front/rear pressure to balance the car. The axis with less pressure will have better grip (usually, not a rule of thumb for exaggerated values)
You can then play with toe values later, but that's all really for street cars and all that you need.
Race cars.
- Understand the engine characteristics and work on the gearbox ratios to have the correct ratio for each corner exit/apex.
Usually 300rpm less than max torque revs for low torque cars, and 600-800rpm for high torque cars.
The gearbox alone can give you a second so to speak
- Check the Aero balance by modifying the wings. Once you have found a balance and drag compromise you're happy with, go back to the gearbox and fiddle again.
- Camber all around. More at the front, less at the rear. Race slicks can use tons of negative camber. -3.5 to -4 should be used at front. Rear around -2 but with exceptions from -1 to -3. As a rule of thumb, if the car has too much turn in oversteer, raise rear camber, but you'll have less traction.
If your turn speeds got higher after that, fiddle with the gearbox again.
If the balance is still not what you like...
- Play with the arbs. The explanations in the setup tool tips should be enough.
- Still not good? Play with the Springs.
When you have played with springs, you'd need to check the ride height and then go to the Dampers and fix any bad behaviors. Dampers is the most complicated thing to understand, feel and setup. Not easy to setup.
Everything you do on a race car setup, always start the cycle again. Don't change many things at a time. Ideally just a couple of click, try, understand, see what the clock says (ultimate judge) and start the cycle again.
