Originally Posted by NikoRacing

You said you have no steering but not where...
I cant understand if you need more steering in the corner entry or in the middle of that.

because if you need steering in corner entry you can get harder front springs, or less caster angle, less rear toe-in, a stiffer rear antiroll bar... or decrease the rear downstop value

instead if you want it in the middle of a corner.. you need softer springs ...or maybe you have too less caster angle ..so the the car steers well in the first part of the corner but understeers in the second part.

Roll-centers affect a lot the setup when the car is on-power but not so much when you are off.
To have a more reactive car you can make the rear rollcenter higher but you will also loose traction in corner exit..and this you will feel expecially in the hairpins.
and in the front end you could make the rollcenter higher ( remember you have to slow down the pins..opposite to the rear setting). But this will take out steering on-power, expecially in the long fast corners.