[surlynkid]

I get no unusual wear on rears all the way up to -1.8 or 1.9. No reason not to use that.

I agree with above post of -2.4 in front if you are not willing to change camber and toe at track. I run -1.6 on street and max out the camber plates to -2.9 on the track. I adjust tie rod ends to compensate.

How much camber you need depends on tires and how hard you drive the car. Where at cota are you trying to rotate? What are your cota lap times?