Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Massive air dam on '98 Geo Metro (Firefly), A-B-A coastdown test; Update: version 2

MetroMPG · 08-20-2009, 01:23 PM

Here are the numbers:

For comparison: remember I did a test to determine the "resolution" of coastdown testing at the same speeds, trying to see if it could register the difference between the driver's window open vs. all windows up:

So, in conclusion: a giant ugly air dam apparently has a greater positive effect on drag than rolling up the the driver's window.

08-20-2009, 01:23 PM	#29 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,530 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 Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,978 Times in 3,613 Posts	Here are the numbers: For comparison: remember I did a test to determine the "resolution" of coastdown testing at the same speeds, trying to see if it could register the difference between the driver's window open vs. all windows up: So, in conclusion: a giant ugly air dam apparently has a greater positive effect on drag than rolling up the the driver's window. __________________ 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