You'll need quite a bit of pressure in the front to keep the tires from rolling under simultaneous braking and turn-in. I think the static weight bias is about 60%+ on the front. The dynamic load under hard braking is probably close to 75% (I'm guessing). What has worked for me is to find a front pressure that allows the car to turn-in under braking without the front end scrubbing. I've done it by feel and not by chalking the tires. Once I found that pressure I tune with the rear pressure. Last weekend I started with 50psi in the rear. The car was very loose through one section of the track so I lowered the rears to 48psi and the balance was better. My theory (not saying it's right) is to start 52/50psi and tune from there. Want more steering go a bit higher in the rear. Want less take some out. I usually end up with a different rear setting each weekend.
I had a thought the other day about my extreme front pressures. My gauge might not be accurate? The tires on my truck look very low even though my trusty, el-cheapo gauge says 60psi. I'm gonna find a good gauge and see how the readings on this one compare.
Chris