On drag radials I stop in the box, do a small spin to evenly wet the tire and roll out a foot or two. I put the trans (4l80e) in second and bring RPM's up to about 5000 and wait till I feel the tires start to grip, then let off the brakes and spin forward a couple feet then let off the gas. It depends on track temp as too how long the burnout is but it's really not very long. If I burn them too long my 60ft drops.