The Hurst solenoid valves included in the PHP kit have a release time of 1/100,000 of a second. A good drag burnout should warm and clean your tires, not fry your rear brakes. But unthinkable ...
A burnout is pretty easy to do, but it's a lot easier with a line-lock. A line-lock allows you to lock the front brakes independently of the rear brakes, so the car stays put while the tires smolder.