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The Chevrolet Impala SS has made his debut in the NASCAR Nextel Cup Series. And of course, with its introduction, the unveiling of the GM Racing's new R07 small-block V-8 racing engine, with a view to the new direction in technology that America's most popular racing series goes.

One of the most powerful element in GM Racing toolbox is what the automaker calls as the CFD or Computational Fluid Dynamics, a mathematical simulation of the airflow around the vehicle. This new CFD technology is influencing the design of both racing and production cars. CFD plays an important role in GM Racing-analysis and the development of a racing version of the Impala SS, as a new generation of NASCAR racing car, which premiered in a competition that takes place in Bristol, Tennessee scheduled on 25 March, 2007.

The CFD technology was first used for the aerospace and defense use, but migrated to the civilian sector as supercomputers, which are available to manipulate complex programs. "The CFD software is a supercomputer because the number of calculations is immense. Foe example, our aerodynamic models usually have more than 10 million discrete points, the data used to calculate the force. It really is rocket science," says Bayless .

Although the price is in this kind of technology is high, but the benefits of CFD are worth it. The sophisticated software makes it possible to see the invisible movement of air over the vehicle's body.

Apart from the Impala SS is the new NASCAR race car of today, there will be Chevrolet high-profile entry in Nextel Cup. The CFD plays an important role to strengthen the identity of Chevy's new on-track representative.

The Impala SS is completely different from the Monte Carlo SS in the aerodynamics, but also in some ways similar to how the two are satisfied with the quality GM auto parts such as the high quality of GM spark plug wires, which are responsible for the conversion of fuel into energy that powers the vehicle. The Impala SS GM employs CFD engineers have a better understanding of the impact of the new body shape, front splitter and adjustable rear wing on aerodynamic performance. "" NASCAR specifications, the Impala SS to be wider and higher than the Monte Carlo SS that it replaces, so that its surface is larger and its aerodynamic drag is approximately 10 percent larger. Initially the Impala SS is about 15 percent less downforce than the Monte Carlo SS, which are heavily over the years. The change from a spoiler to an adjustable rear wing is to reduce turbulence in the wake of the car, so that when two cars running nose to tail, the less turbulent air behind the first car should push some of the aerodynamic, with which the following car, ' "explained further by Bayless.

It is also important to note that although the CFD is a powerful engineering tool is not to replace the conventional wind tunnels and track testing.

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Noah Scott is a 30-year-old native of New Jersey, writer, and car fan - which deals with both parents car enthusiasts. He works for the auto consulting firm and regular articles in car magazines.