This is a subject that has a lot of misconceptions, as many people try to tune how the car is balanced in drift by adjusting the rear toe. You shouldn’t run too much rear toe-in on a drift car. By doing so, you’ll have a car that will straighten up if the throttle is lifted or modulated. This is the leading cause of serious drift car crashes. A car’s understeer/oversteer balance should always be adjusted in the suspension, not by using the toe. If you want the car looser, with more oversteer, increase the rear bar stiffness and/or rear spring rate and stiffen the rear shock. If you want to tighten up the car, with less oversteer, run softer rear bar, spring and shock.
Run a little toe in — usually, you want to run about 1/8-inch. Cars with semi-trailing arm rear suspensions like BMW E30s, Nissan Z31s and S12s can run more like ¼-inch toe in, as these cars will toe out under roll. If you’re having trouble making angle in high-speed turns, run zero rear toe, but never run rear toe out — that will make your car very twitchy.
Read more: http://www.superstreetonline.com/how-to/chassis-suspension/modp-1201-basic-drift-chassis-setup/#ixzz3UP2Gfvuj