List of NASCAR Car Rules

What are the rules for Cars In NASCAR
  • Modern NASCAR vehicle frames are made of multiple circular and square tubes of different gauges. The body is made up of hand-made, thin steel formed to NASCAR car specifications.
  • The 5.87-liter engines are custom-made for racing
  • Cars have over 750 horsepower.
  • For safety, there is a “roll cage” in the car to protect the driver from when the car crashes, flips.
  • Drivers must use helmets that spread the force of impact across a wide surface.
  • Cars are required to have a safety harness that helps protect the neck, head, shoulders, and ribcage. Since the safety harness was required in 2001, there have been no deaths during competition.

Car Modifications

In NASCAR, a simple modification to a car can give you an advantage like no other. Simply modifying a part of the engine can make all the difference between winning a race and finishing in the bottom half. To ensure a level playing field, NASCAR has extremely strict conditions for what can and can’t be allowed for car modifications.

Car Inspections

NASCAR cars are inspected extremely closely after the completion of a race. This is done to ensure all participants followed the rules on what is and isn’t allowed for the construction of the stock car. Once a race is complete, the winning car is completely broken down to check for illegal parts or anything that may have given the winning driver an advantage.

Car Engine Rules

Obviously, the driver has some flexibility on how their car operates for a race, however, there are some rules and regulations that must be followed. For example, the car must be using a carbureted V-8 engine with an iron block. They must also use blocks, cylinders, and intake manifolds from approved manufacturers.

Original Car Rules

The evolution of NASCAR stock cars has been considerable since the founding of the league. This is how NASCAR and their stock cars were in 1948:

  • The car body and frame were made from the same steel used for average cars on the road.
  • Cars had six or eight valve machines for their engine.
  • Cars had less than 200 horsepower.
  • Drivers had very little protection, regular crashes prompted safety rules.