Quote:
Originally Posted by freebeard
Perhaps you would have an opinion on this
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A few ecomodders have those on their vehicles.
Works even better if you make one on both ends of the wheel - and connect them with a plate on the inside to shield the tyre from the air.
Remember that the airflow on the underside of the car is not aligned with the car.
The air wants to get out between the front and rear wheels, so you get almost diagonal flow in front of the rear wheels.
It'd help to align the rear wheel spats with that flow, rather than make them parallel to the car body - it's likely also part of the reason why a narrower rear track is an advantage.