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MetroMPG · 01-15-2008, 03:53 PM

If you can get airflow (mass) from the OBD2 port, you should be able to do a simple instant fuel economy calculation based the stoichiometric air fuel ratio of 14.7 to 1. Factor in your speed, and you're good to go.

The SuperMID works by using a (user-programmed) volume for the fuel injector. It counts fuel injector pulses per distance traveled and bases the calculations on that.

01-15-2008, 03:53 PM	#2 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,532 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: 4,082 Thanked 6,978 Times in 3,613 Posts	If you can get airflow (mass) from the OBD2 port, you should be able to do a simple instant fuel economy calculation based the stoichiometric air fuel ratio of 14.7 to 1. Factor in your speed, and you're good to go. The SuperMID works by using a (user-programmed) volume for the fuel injector. It counts fuel injector pulses per distance traveled and bases the calculations on that. __________________ 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