To get more steering in tighter tracks, play with your ackermann. Go for more angled steering links. Once you get close on that, then you can play with other things. Sometimes, if you don't play with ackermann, then no matter what you do to try and get more steering (or less), it will just not work. You'll be dumb founded on what to do with the car. So my opinion is to set that first, then just fine tune everything thing else. This technique has brought me the most success with the car, especially since I ran in all kinds of conditions and new/different tracks.
More angled links = Less Ackermann = tighter tracks/more steering = more off power steering.
More straight links = More Ackermann = flowing tracks/less steering = more on power steering.