View Single Post
Old 07-07-2015, 11:22 AM   #19 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,527

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 65.39 mpg (US)
Thanks: 4,078
Thanked 6,973 Times in 3,609 Posts
flat vs. angled dam



Quote:
Originally Posted by ThePrudentNinja View Post
I wonder if the angle of the "air dam" would make any difference. I've noticed almost all air dams seem to be 90 degrees. I wonder how a 45 degree angle (in either direction) would perform.
Amateur ramblings:

1) Each would affect front end lift differently. The sticky-outy one (top) would probably reduce front lift more than the bottom one.

2) Those variations might raise or lower the stagnation point compared to a flat dam. I'm under the impression that the lower the stagnation point, the better. (My guess: the top, sticky-outy version is probably best.)

3) You'd hit the top one on far more grade changes, bumps & curbs than the bottom one (assuming same ground clearance).

4) As mentioned, a flat dam is far easier to DIY -- the front-to-side transition is a simple curve.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
ThePrudentNinja (07-07-2015)