The burnout is the most recognizable moment in drag racing. The car rolls through a puddle, the driver holds the brakes, the rear tires spin, and a cloud of smoke rolls across the starting line. It looks like showing off, and there's a bit of that. But the burnout has a real job, and it's tied to the part of the race that decides more outcomes than any other: the launch.
Why traction matters so much
When the green comes on, a drag car tries to go from zero to highway speed in a couple of seconds. The engine can almost always make more force than the tires can put on the ground. If the tires can't grip, they spin, and a spinning tire pushes the car forward much less than one that's gripping.
That makes the first 60 feet critical. A car that spins its tires even briefly can lose a tenth or two by the 60-foot mark, and it keeps losing ground all the way down the track because it's going slower at every point. As we cover in How to Read a Time Slip, every hundredth off the 60-foot time is worth roughly one and a half to two hundredths at the finish.
So anything that helps the tires grip at the moment of launch is worth a lot. That's what the burnout is for.
What a burnout actually does
A proper burnout does three things for the rear tires:
- Heats them. Racing tires, especially soft drag slicks, are made from rubber compounds that get stickier when they're warm. A cold slick grips poorly. A few seconds of hard spinning brings the tread up to temperature.
- Cleans them. On the way to the line, tires pick up dust, grit and small stones. Spinning them scrubs that debris off so the rubber meets the track directly.
- Lays down rubber. A burnout leaves a thin layer of warm rubber on the track. When the car launches from the same spot, the tire is effectively gripping rubber on rubber.
After the burnout, many drivers back up and drive through their own tire marks on the way to the line. Some classes and tracks don't allow backing up, so the crew guides the car forward instead.
The water box
The puddle behind the starting line is called the water box. Drivers roll their rear tires through it and then pull forward before doing the burnout. The water lubricates the tires so they break loose and spin easily, without the engine having to fight a lot of grip. That makes the burnout quicker and easier on the drivetrain.
You might hear older racers call it the bleach box. Years ago, racers used bleach instead of water, because it made the tires spin even more easily. Most tracks switched to plain water long ago.
Street tires usually shouldn't go through the water box. Their tread holds water, which then gets carried up to the starting line and makes grip worse. Many tracks ask street-tire cars to drive around it and do a short, dry burnout, or skip it altogether.
Track prep
The track itself is part of the traction story. Before and during an event, track crews scrape loose rubber, blow off debris, and spray a sticky traction compound on the launch area, usually the first few hundred feet. Some tracks also drag a heated tire across it, or run a car or tractor over it, to work the compound in.
A well-prepped track can make an enormous difference. The same car can run a tenth or more quicker on a sticky, prepared surface than on a cold or dusty one. It's why racers pay close attention to the conditions, and why the first pass of the morning is often slower than the ones later on.
How long should a burnout be?
Longer isn't better. The goal is warm, clean tires, not a show for the grandstands. A burnout that goes on too long can overheat the tires past their best temperature, heat up the engine and transmission, and waste fuel. Most sportsman racers keep it to a few seconds, and many cars on street tires do only a quick spin to clean them off.
Racers also watch for how the burnout looks. An even smoke from both tires usually means both are working. A burnout that pulls to one side can hint at a problem with the rear end or tire pressures.
The launch after the burnout
Once the tires are ready, the launch itself is a balance. Too much power and the tires spin anyway. Too little and the car bogs. Racers manage this with:
- Launch RPM. The engine speed the driver holds at the line before letting the car go. Higher RPM gives more power right away, but risks wheelspin.
- Tire pressure. Lower pressure lets the tire spread out and wrinkle, putting more rubber on the track, up to a point.
- Weight transfer. When the car accelerates, weight shifts backward onto the rear tires, pushing them into the track. Suspension setup controls how quickly that happens.
- Throttle control. On street tires especially, feeding in the throttle smoothly for the first second often beats flooring it.
Tire shake and wheelspin
Two things can go wrong right after the launch. Wheelspin is exactly what it sounds like: the tires lose grip and spin. Tire shake is more violent. The tire grips, slips, grips and slips again, many times a second, and the whole car starts to shudder. Drivers usually have to lift off the throttle to stop it, which costs the run. Both show up on the time slip as a slow 60-foot and a slow 330-foot time.
The burnout in The Drag Car Racer
In the simulator, you get one burnout per run, before you stage. Press B on the keyboard, or B or Circle on a controller. The car spins its rear tires and smokes for a few seconds. In return, you get a boost to launch power right after the green light. The boost fades over the first second and a half, which is exactly the part of the run where grip matters most.
The burnout happens before timing starts and there's no penalty for doing one, so there's no reason to skip it. Make it part of your routine: roll up, burnout, stage shallow, watch the ambers, go.