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Best approach for aero improvement on sedan roof?
Hey guys, I've got my first question... I've got a 2007 Chevy Malibu, and I've been getting into eco-modding it, and the easiest gains at the moment are aerodynamic... Generally speaking, is it better to keep flow attached to the back glass of a sedan through use of a vortex generator(like EVO 8/9), and use a lip spoiler like a lot of new cars are using, or is it better to build a partial kamm-back"sunshade" to extend the roofline?
Given the steep angle of the back glass, I highly doubt that any sort of attached airflow is present...
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