Underbody Lining

Underbody Lining

The underbody lining has been enlarged by approx. 50% to counteract the increased drag caused by the larger frontal area as well as the higher cooling air requirement. As a result, the air routed along the lined underbody is now much less prone to turbulence and loss. This significantly reduces drag and lift.

The underbody lining from the previous model 911 Carrera (996) has been extended and optimized to the aerodynamic requirements of the 911 Carrera/S (997). The underbody lining at the front has been extended to the front side members to compensate for the aerodynamic drawbacks of the new brake air deflector.







NOTE:
- The components shown in yellow are panel components which have been adapted from the previous 911 Carrera (996) model.
- The green components are additional panel components

The revised underbody design resulting in a smoother surface means that air passing the rear of the vehicle is less prone to deceleration and turbulence. This means that there is a greater air flow mass available to the cooling air openings located in the underbody, which permits extremely efficient engine cooling from the point of view of aerodynamics and thermodynamics.

Three openings have been integrated in the underbody lining to ensure ventilation of the transmission. Part of the air flowing along the underbody is routed upwards through these openings in the direction of the transmission and used to cool the transmission. The air is directed and channeled between the transmission and the lining so that a large section of the transmission housing is hit by cool air from the underbody. A additional opening has also been added to route cool air to the transmission differential via an air duct.