NASCAR Basics: Impound Races

Image by fdtate via FlickrOn a typical NASCAR race weekend, Sprint Cup drivers will get some practice time in and qualify Friday, followed by more practice Saturday and the race on Sunday.  Crewmembers can set up the cars for qualifying, then dial in a race setup.  For an impound race, NASCAR usually shifts to Saturday qualifying, then impounds the cars from after qualifying until the start of the race.

At one time impound races comprised over half of the races on the Cup schedule.  It was supposed to be a cost cutting move, a balance between the teams that could afford to set up the car twice, once for qualifying and once for racing, and those who had to make due with just one setup.

The number of impound races has been pared down to just a few -- currently, the two Talladega races and the July Daytona race.  Television networks, sponsors, track officials and fans wanted to see more on-track activity on a race weekend.  Secondarily, the rules seemed to be hurting the poorest teams the most, the ones the rule was designed to help.

The richer teams were able to be more liberal with their setups.  Since they were in the Top 35 in owner's points and therefore locked into the race, they didn't have to strain to get all the speed they could in qualifying.  The poorer teams, who were more likely to be go-or-go-homers having to get into the race on speed, were forced into qualifying setups that they had to change into race trim on pit road during the race.

When a car is impounded, two crewmembers are allowed in to turn off the electrical switches, take out the radio, check air pressures and cover the cars.  They must then leave the garage.  On race day, two crewmembers are allowed in to get the car ready for the race.  They can connect the oil heater, open the hood, prime the oil system, start the car, move the car out of the garage, open the oil cooler pressure valve if needed, start the engine, close the hood, check and adjust air pressures, tighten the wheels, put the radio back in the car, put in a water bottle, adjust the tape on the front of the car, replace equipment batteries, and add a limited amount of fuel.  All other work is forbidden except with NASCAR authorization which is rarely granted.