I've had a search of the forum and here are a few peoples replies to various setup questions -
.......................................
Softer springs makes it grippier, slower and usually more stable.
Harder springs makes it loose, faster and usually far less stable and harder to control.
.......................................
One thing you have to remember this that setups are not crucial to fast laps, they are helpful but not crucial. You need to sort out aspects of your driving aswell to be fast, for example think logically when going into the bends. To go as fast as you can you generally need to use as much track as you can to speed up, so for places like buxton, arena and northampton you would want to be driving near the fence on the straights and cutting into the corners reasonably late. That way you will be braking as you are turning the corner, and you will also be going fast whilst maintaining a tight line. Then accelerate down the straight near to the fence as soon as you feel that doing so won't spin you or drag you into the fence. Then repeat the process for the next bend. Thats the way to do it on most tracks, well it is for me anyway. Setups help alot of course. Start with the 'default' setup and then adjust wheel lock, depending on your controller, you want around 9 or 10 for gamepad, abit higher for keyboard and even higher for steering wheel. Then you want to sort out the weights, mainly wedge as this will affect the over/under steer on the car quite dramatically, then play about with the sway bars. If your using automatic gears then change your gear ratios so that you are only using two gears, and the final gear. Set 3rd and fourth gears 0.50 as this will prevent the car from going above second. Then play with your racing gear (in this case your second gear) and get it so it stays in that gear and does not shoot down to first round the bends, and so that you hit around 7000 rpm at the end of the straights. Final gear will also have the same effect when you adjust it, so you just need to play. Leave shocks and springs until your confident, a simple gears, weights, sway bars and wheelock setup should start you off nicely and get you clocking some near-on-pace laps.
..............................
when in game go to controls and turn down throttle speed, its prob set to max. turn it down so the red bar indicator goes down to quarter or just before the quarter, should help you a lot.
......................
soften the right rear spring and bump and raise the front sway bars and reduce the rear to nothing. to much left handside camber will aslo make your car spin out, reduce this also till your happy with turn in and not oversteering out.
..........................
then you can start playing with the rest. adjusting front and rear shocks making the front harder and stiffer will give understeer, if your fronts to soft and rear to high it will oversteer badly. also make sure you lock isnt set to high also, i find between 5-8 is ok, to high and it,l oversteer again.
Try setting the wedge to 50%
Set the rear tyre pressures, springs, shocks a rebounds all equal on left and right. Also on more uneven surfaces have larger differences between the shock & rebound. If that leads to understeer then set the right rear slightly higher settings than the left rear or add more left weight or more wedge on left front.
You can make it turn in better by setting the right front on higher settings than the left but this usaully makes it oversteer. As such, you need to counteract that with rear wheels settings & weight.
..............................
If I've never raced a track before , I usually use the setup exchanger in the MOD LAUNCHER to copy setups from previous tracks and try to find a good starting point for that setup .
Hope this post along with LeeK's post helps others
Cheers
Gary