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Aerocivic - how to drop your Cd from 0.31 to 0.17   Aerocivic - how to drop your Cd from 0.31 to 0.17
The first of its kind, the Aerocivic. This car has been pumping out hybrid smashing mileage for years now. VERY impressive build.
By basjoos - 694 replies
In forum: Aerodynamics

VW Lupo 3L --> 2L   VW Lupo 3L --> 2L
Vekke has taken one of the world's most efficient cars and is modifying it extensively for even better results. "Best fuel consumption so far is 2.24 L/100km at 80 km/h average speed, which equals 105 MPG (US) at 50 MPH avg. speed."
By Vekke - 385 replies
In forum: EcoModding Central

Paul & Sabrina   Paul & Sabrina's cheap DIY 144v motor controller
A thread and project of epic proportions where Paul designs a DIY 144V DC electric motor controller.
By MPaulHolmes - 7309 replies
In forum: Open ReVolt: open source DC motor controller

You know you   You know you're an ecomodder if/when...
One of the more popular threads on EcoModder, this is a lighthearted and tongue-in-cheek look at the many potential signs and symptoms that you may be more interested in fuel economy than the average person...
By Tango Charlie - 2316 replies
In forum: The Lounge

Notable eco-cars (old & new) spotted in the wild: post your pics!   Notable eco-cars (old & new) spotted in the wild: post your pics!
Check out interesting and rare eco-cars that people have stumbled across, and share findings of your own!
By MetroMPG - 1258 replies
In forum: General Efficiency Discussion

Buy a trailer (instead of a pickup truck)   Buy a trailer (instead of a pickup truck)
This is a thread for anyone thinking about getting a pickup truck as a first or second vehicle when adding a trailer to your car would do instead (and save you lots of fuel & money).
By oil pan 4 - 954 replies
In forum: General Efficiency Discussion

Speed vs. MPG charts (post   Speed vs. MPG charts (post 'em if you got 'em)
The speed at which you choose to drive has the biggest impact on your highway fuel consumption. This fact is nicely demonstrated by this collection of graphs showing the relationship of MPH to MPG in a variety of vehicles, from a 55 hp Geo Metro to a 505 hp Corvette, and many others in between.
By bluejoey - 180 replies
In forum: Hypermiling / EcoDriver's Ed


Efficient, cheap beaters! Used car ads: 35 mpg highway or more for $1500 or less   Efficient, cheap beaters! Used car ads: 35 mpg highway or more for $1500 or less
People often sign up on the forum seeking advice on cheap, economical beaters. The purpose of this thread is to go beyond the hypothetical, and post actual ads of actual available cars. They're out there, people. (Our non-North American members should feel free to laugh at our concept of 'efficient' little cars.)
By MetroMPG - 822 replies
In forum: For Sale

1946 Chevy Prius Truck   1946 Chevy Prius Truck
Watch how member Hoopie is integrating a 2001 Prius platform & drivetrain into a 1946 Chevy Truck, with the goal of making the changes invisible to the casual observer.
By Hoopie - 283 replies
In forum: Hybrids

Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L   Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L
The Micra's official ratings are almost the same for the automatic and manual transmission. Yet the 5-speed can be much more efficient in the real world using just one simple ecodriving technique. Again we see the EPA handicaps manual transmission cars due to dictated, non-eco shift points during testing.
By MetroMPG - 65 replies
In forum: Hypermiling / EcoDriver's Ed

Aero RV (custom boat tail for   Aero RV (custom boat tail for '95 Ford E-350 Class C motorhome)
Orbywan says: "About a month ago I decided to build a boat tail for my 95 E-350 Ford 25 foot turbo diesel Class C motor home. I read the aerodynamics study NASA did at Dryden Air Force base back in the late 60’s on the squared off E-150 van about 20 times, as well as several other studies, drew up some plans and three weeks later and some serious sweat the prototype is done and tested." Initial results show about a 20% mpg improvement.
By orbywan - 185 replies
In forum: Aerodynamics

Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204   Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204
By Vekke - 53 replies
In forum: Aerodynamics

How to properly test modifications (AKA: don   How to properly test modifications (AKA: don't believe every MPG claim you read)
Here on EcoModder we see a lot of claims made about the effectiveness (or lack of effectiveness) of specific modifications. It's an understatement to say not all claims are made equal. It all depends on how rigorous the test is.
By MetroMPG - 116 replies
In forum: EcoModding Central

Echo-Troll Modding Thread (2005 Toyota Echo)   Echo-Troll Modding Thread (2005 Toyota Echo)
Follow the progress of an extensive aeromodding project on a 2005 Toyota Echo 1.5L , 5-speed. EPA : 30 City \ 38 HWY \ 33 Combined MPG (US). Modified MPG: 60 to 75 MPG in a 4.3 mile commute \ 60 to 67 mpg on the highway.
By echo-francis - 324 replies
In forum: EcoModding Central

Experiment: coast down distances (rolling resistance) @ various tire pressures   Experiment: coast down distances (rolling resistance) @ various tire pressures
Increased air pressure reduces a tire's rolling resistance - but is more pressure always better? Coast-down distances are measured for three different kinds of tires, with pressures ranging from 20 through 70 psi.
By MetroMPG - 116 replies
In forum: EcoModding Central

Have you ever given 1-on-1 ecodriving instruction? (Here   Have you ever given 1-on-1 ecodriving instruction? (Here's how I did it.)
MetroMPG walks us through his recent experience of teaching individual "non-hypermilers" about ecodriving. With just an hour-long session, each driver's results showed an immediate increase in fuel economy above their car's EPA ratings.
By MetroMPG - 112 replies
In forum: Hypermiling / EcoDriver's Ed

Aerodynamic streamline template - online tool (view streamlined extension on any car)   Aerodynamic streamline template - online tool (view streamlined extension on any car)
Member seifrob made an online tool that overlays a streamlined template on an image of any vehicle to visualize the "ideal" extended low drag shape. Very useful for anyone considering building a drag-reducing Kamm back, full boat tail, box cavity, spoiler, etc.
By seifrob - 180 replies
In forum: Aerodynamics

The AX Eco Project : 100 mpg target !   The AX Eco Project : 100 mpg target !
In the 90's, the super light Citroën AX diesel held a Guinness record as the most efficient production car available, capable of 65 mpg (US) at 56 mph (90 km/h). HypermilerAX's modifications have already improved this to 80 mpg (US) at 56 mph. Now he's aiming for 90 mpg to beat the 1994 "AX Eco" concept car, and is also eyeing a 100 mpg tank (2000 km).
By HypermilerAX - 131 replies
In forum: EcoModding Central

Taller Tire Test (5.7% MPG increase observed on Honda CR-Z @ 55-65 MPH)   Taller Tire Test (5.7% MPG increase observed on Honda CR-Z @ 55-65 MPH)
The purpose of the test was to determine whether larger diameter tires, which result in lower engine RPM and higher load for a given speed, can improve gas mileage. The test car has a 6-speed manual transmission. At highway speeds (55-65 MPH), the larger tires gave a 5.7% average increase in MPG. The engine ran about 200 RPM lower.
By SecondWind - 72 replies
In forum: EcoModding Central

Another truck aero cap idea...   Another truck aero cap idea...
Follow the evolution of BamZipPow's aerodynamic cap for his 1998 Toyota T-100 pickup.
By BamZipPow - 389 replies
In forum: Aerodynamics





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