Nice settings...a lil' like mine, except i lowered my brake settings to about F7/R4
Are you using the DFP??? I've noticed that when you drive with the DFP, you CANNOT slam on the brakes, and that's what a lot of people do. The wheel lets you have complete control over the car's braking/accelerating ability. Ease up on the throttle and lightly apply the breaks.
I've noticed that it's much easier for me to drive at higher speeds b/c i'm not slowing down so much, and i'm conserving tire life by not riding the brake all of the time. You can gas your way through a lot more situations than with the Dual Shock 2, from my experience.
If you're using the wheel, learn some throttle control and hit the brakes slowly. I also lower the brake settings on the Brake Balance Controller to soften them up, b/c I have a problem of slamming on them when i'm pushing it. That way you're not locking your wheels up all of the time (it does happen) and you have better braking control.
Of course this only really applies if your using the wheel, but adjusting the ride height will also help. A lot of people make the mistake of lowering the car too low, and applying too much downforce...which will kill your tires. Better control of the car, means better tire life. I use R-Medium in the rear, and R-Soft in the front for most races.