[MetroMPG]

I haven't had an air dam on the Firefly/Metro since I posted this thread back in 2009. However, inspired by Tim's recent Metro lawn edging air dam thread, I just did something similar.

I've done a couple of air dams since 2009, just not to the Firefly, eg:

• I added & tested one (as part of a set of mods) on my "winter beater" 2007 Honda Civic (since sold)
  
  
• I did the same thing on a 2014 Mitsubishi Mirage loaner
  
  
• I also stuck one on the 2015 Nissan Micra loaner I had recently
  
  

Here's the Firefly's version 2.0 ...








Tim used metal brackets to mount his in a very respectable one hour of tinkering time. Very quick 'n' easy, but it can have an uneven, "wavy" look to the edging, so I took a slightly different approach.

1) I trimmed a length of 1x3 wood to match the curvature (plan) of the bottom of the bumper (front face) where the lawn edging would attach. Then I attached the wood to the bumper and screwed the edging into the wood.

2) To take the waves out of the bottom of the edging, I screwed 2 layers of coroplast to the back side to make it thicker.

3) To stiffen the air dam to keep it from being pushed backward, I screwed a couple of scraps of edging between the air dam and the wood, under tension:



Each one is just touching a screw that comes through the air dam, so they're pretty stiff/secure. But not so secure that they won't give way if (when) I hit the air dam on something.



It's got 5 inches ~13 cm of clearance. A bit more than I would like, but one of these years I'll lower the car an inch or 2 and make it just right.

To finish up, I just need to dab some black paint on the screw heads to hide them a bit.