Chevy Spark + rear diffuser
 

Wifey's new ride gets its first "real mod"

GP Fabrications unit, very nice piece.

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I'm jealous. I wish someone would make one of those for my Fit! I put a front undertray on, which helped mileage marginally (~1 MPG) but really, really, helped with stability at highway speeds and in windy conditions. But the back end is still open.

Its a universal piece. I had to fabricate/weld some aluminum brackets to mount the leading edge.

How did you gauge the angle? There are more and less effective angles, depending on vehicle. Can you adjust it?

I kinda just eyed it up. I put the leading edge just above what I think the main path of the airflow is going coming under the axle. I may have got it right. I may be off. I want to fill in the rest of the area once I get ahold of some aluminum sheet.

Looks purty, but a diffuser needs clean flow to work properly. Since the underbody ahead of it is dirty, aerodynamically speaking, it's probably not doing much!

A belly pan would help. Next project??

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.

Question is, how it effects fuel economy. Looking cool can take a backseat.

The tank with it is the best so far...but we will see

Hey, Im not able to see pics at this late date of diffuser, can you send to me or repost, really interested for my 2013 Spark, thanks