Go with 3 to 4 degrees of negative camber, which helps put the tread flat on the ground when under side load. Under load, the tire’s carcass wants to flex and lift the inside of the tread off the ground; as the car rolls, it also wants to tip the tire to where the inside of the tread is being lifted off the ground. The car’s suspension geometry tries to make up for some of this, but it can’t totally compensate — running negative camber compensates for this. By keeping the tread on the ground, you get better front grip and less understeer. You don’t want your drift car to understeer if you can help it. If your car has multilink front suspension, you can use closer to 3 degrees of negative camber; a strut-type suspension can use closer to 4 degrees.
Read more: http://www.superstreetonline.com/how-to/chassis-suspension/modp-1201-basic-drift-chassis-setup/#ixzz3UP1HEleZ