|
Hansv,
It's hard to say what the airflow is on a 911, as it varies somewhat with speed but the rear of the car is usually very turbulent and most things I have seen indicate that it's a low pressure area. In any event, comparing the area of the slots with the vastly larger open area under the rear wheel wells give me the impression that the slots' contribution wouldn't be much.
Any turbocharged 911 gets pretty hot around the rear bumper area, so I'd bet the slots are mainly there to vent the heat when the car is stationary, or moving at low speeds.
Cheers,
JR
|