You want to run as much positive caster as you can get without hitting the fenders. Typically this is around 7 degrees or so on most cars. Caster really helps a drift car by making it self-steer better. When you start to drift, you can simply let go of the wheel and let if feed through your fingers and the car will counter faster than if you were steering it yourself. Caster also gives you more negative camber as the wheel turns which helps front grip. More caster helps the car turn in better and makes the car more stable as well. You probably don’t want to exceed 9 degrees of positive caster as this can actually cause understeer due to weight jacking as well as contribute to bump stee