Asphalt modified racecar aero tips and ideas

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In summary, the conversation discusses various modifications to improve airflow and performance in an asphalt modified car. These include a trap door in front of the spoiler, moving the solid rear panel up, and using a 1/2" square mesh for the right side of the windshield. The question is raised about using something bigger and if this is the appropriate forum for such a question. It is suggested to cut a rear panel to vent air directly out the rear and see if it has any impact on lap times. The conversation also references a quote from Waddel Wilson, a well-known Nascar crew chief, about the importance of airflow while driving.
  • #1
mikey531
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We run an asphalt modified on 1/4 to 1/3 mile tracks. We have been thinking about a trap door in front of the spoiler to allow trapped air behind the rear to exit in front of the spoiler. We have also moved the solid rear panel up the 1/2 " from the rear bumper. We are also using a 1/2" square mesh for to cover the right side of the windshield. Should we use something bigger ? Any ideas would help. Also is the right forum for this question?

Thanks
Mike
 
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The rear spoiler is placed there to create down force on the rear tires. putting a vent in front of it would defeat that purpose. Most Mods run total open rear to permit air flow thru the underside. I assume you are not running ANY windshield or glass so air flow is kind of iffy anyway. I suggest cutting a rear panel to vent air directly our the rear and see if it has any effect on lap times.
Waddel Wilson that sage of Nascar crew chiefs once said " if you are moving, you are moving air" ...
 
  • #3
Ranger Mike said:
The rear spoiler is placed there to create down force on the rear tires. putting a vent in front of it would defeat that purpose. Most Mods run total open rear to permit air flow thru the underside. I assume you are not running ANY windshield or glass so air flow is kind of iffy anyway. I suggest cutting a rear panel to vent air directly our the rear and see if it has any effect on lap times.
Waddel Wilson that sage of Nascar crew chiefs once said " if you are moving, you are moving air" ...
Thank You I knew you would have the answer !
 
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Related to Asphalt modified racecar aero tips and ideas

What is the purpose of aerodynamic modifications on asphalt modified racecars?

The purpose of aerodynamic modifications on asphalt modified racecars is to improve the car's performance and handling by reducing drag and increasing downforce. This helps the car maintain traction and stability at high speeds, allowing it to corner and accelerate more efficiently.

What are some common aerodynamic modifications used on asphalt modified racecars?

Some common aerodynamic modifications used on asphalt modified racecars include front and rear spoilers, side skirts, diffusers, and air dams. These components work together to manipulate the airflow around the car, creating more downforce and reducing drag.

How do aerodynamic modifications affect the speed of an asphalt modified racecar?

Aerodynamic modifications can both increase and decrease the speed of an asphalt modified racecar. By reducing drag, the car can achieve higher speeds on straightaways. However, the added downforce can also slow down the car in corners, as it creates more resistance against the tires.

Are there any rules or restrictions on aerodynamic modifications for asphalt modified racecars?

Yes, there are rules and restrictions on aerodynamic modifications for asphalt modified racecars set by racing organizations. These rules typically limit the size and placement of aerodynamic components, as well as the materials that can be used.

How can computer simulations and wind tunnel tests be used to improve aerodynamic performance on asphalt modified racecars?

Computer simulations and wind tunnel tests allow engineers to analyze the aerodynamics of a racecar and make adjustments to improve its performance. They can test different configurations and designs to find the most efficient setup for a specific track or race. This saves time and resources compared to physical testing on the actual racecar.

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