Question : What do the cars need to go through in a Nascar inspection?
I know about the height, weight stuff, but how, and under what conditions do they test them? On a flat piece of concrete, in a wind tunnel with 180 mph wind? I’ll bet within 2 days you could have some software, where you could do the physical inspection of the car, on a straight away, during their qualifying run! Then give them 1 chance to fix it! Sounds better than on a slab of concrete anyway
inspection software

Best answer:

Answer by mindcrime828
The cars are actually put through a very thorough inspection several times each weekend. NASCAR uses an inspection area, known as the “Room of Doom” to many, that consist of several stations. They are inspected prior the first practice, before and after qualifying, and before the race. Several cars are also subject to post-race inspection.

First the height of the overall car is checked, along with the height of the splitter, rear wing, fenders and quarter panels. Then the car is put on scales to make sure that overall weight meets the minimum, as well as the minimum weight on the right side (more weight on the left makes the car turns easier, so NASCAR implemented a minimum on the right side). The body has to fit a series of templates that are fit together and our lowered on the car like an exoskeleton. The inspectors then check to make sure any variance from the templates are within the stated tolerances. All of the safety features of the car, such as the seat, seat belts, fire bottle, etc are checked to make sure they are up to date and working properly (the belts have a limited life span before they have to be changed).

Finally, many of the mechanical items are the car are checked. The springs and shocks are measured that they have the required coils and pressure, respectiveley. The engine is looked over thoroughly to ensure all components meet specifications. The fuel cell is measured to make sure its of proper size. And the suspension is inspected so to ensure it is mounted and setup within guidelines.

NASCAR actually only used a wind tunnel to test the cars a few times during the year to make sure one make doesn’t have an advantage. With the new car, its probably even less as the bodies are almost identical with the exception of the top area of the nose. It is not a part of the weekly inspection process as obviously there isnt a wind tunnel at every track. NASCAR also takes two cars, the winner and one at random, from each race back to its R&D center to a more thorough post race inspection as a final check on the teams.