Chevy Spark + rear diffuser

[aerohead]

Originally Posted by malibuguy

indeed. i want to look into maybe getting the factory panels from an EV Spark, but most likely Ill make my own. This car looks really simple to flatten out.

Coventry University did some some research on an Audi A2,at the MIRA wind tunnel.They found that a diffuser was only effective if the underbody ahead of it were smooth,as MetroMPG mentioned.Without it there was zero-gain.