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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 - 64 replies
In forum: EcoModding Central

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 - 674 replies
In forum: Aerodynamics

Arduino controlled automatically actuated grill block   Arduino controlled automatically actuated grill block
Here's the idea: Use an arduino to monitor temperature and output commands to a simple electric door lock actuator. This actuator will close and open the grill block door. Originally started back in 2009, this project sputtered out when the first design didn't work well. The 2012 redesign looks much better.
By Daox - 167 replies
In forum: Aerodynamics

1997 Civic CX to HX engine/VX trans swap! 63 MPG @ 62 MPH   1997 Civic CX to HX engine/VX trans swap! 63 MPG @ 62 MPH
When his 1997 Civic CX engine needed a lot of work, turbovr41991 decided to spend his repair time doing something different: he picked up a rusty Civic HX and swapped over the more efficient lean burn engine instead, and went with the more efficient gearing of the Civic VX. With a few other modifications in place, the car is returning seriously impressive highway fuel economy.
By turbovr41991 - 181 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 - 322 replies
In forum: EcoModding Central

David   David's Solectria Force Rebuild
David purchased and fixed up a Solectria Force (OEM EV Geo Metro) that needed some body and electrical work done.
By TheSGC - 82 replies
In forum: Fossil Fuel Free

April 15, 2016: Watkins Glen Green Grand Prix   April 15, 2016: Watkins Glen Green Grand Prix
The GGP is THE car show/event for EcoModders. Each year there are tons of interesting vehicles to see (many owned by members here), and/or you can enter the challenging economy run competition which takes place on the historic Watkins Glen race circuit.
By mloveland78 - 103 replies
In forum: Events & Meet-ups


Project Iron-Pig: My 1996 Land Cruiser Diesel Conversion   Project Iron-Pig: My 1996 Land Cruiser Diesel Conversion
SuperHatch goes through the process of putting a Mitsubishi diesel engine in his 1996 Land Cruiser.
By SuperHatch - 49 replies
In forum: EcoModding Central

1971 Corvette EV Conversion   1971 Corvette EV Conversion
The builder's goals: "...to be able to bake the tires, as well as be able to drive it further then across town. We are aiming for around 60-80 miles per charge, but will be sacrificing range for performance. Since its a Vette, it has to be fast!"
By adamj12b - 112 replies
In forum: Fossil Fuel Free

Rucksack alternator delete (portable DIY power pack to reduce alternator load)   Rucksack alternator delete (portable DIY power pack to reduce alternator load)
By jakobnev - 21 replies
In forum: EcoModding Central

94 Caprice Wagon 5.7L project--46 MPG so far   94 Caprice Wagon 5.7L project--46 MPG so far
A huge boat of a vehicle modded to get some crazy good mileage.
By funkhoss - 73 replies
In forum: EcoModding Central

Making a more efficient, aerodynamic soapbox gravity race car   Making a more efficient, aerodynamic soapbox gravity race car
Orengomotors is from Barcelona where they do soapbox racing and he is looking for an edge.
By orengomotors - 266 replies
In forum: Aerodynamics

Review: driving a $9998 2015 Nissan Micra (Nissan   Review: driving a $9998 2015 Nissan Micra (Nissan's most efficient manual in Can/US.)
MetroMPG gets a Nissan Micra to review for a week.
By MetroMPG - 82 replies
In forum: General Efficiency Discussion

Civic VX MPG project (Delete Alternator, add solar)   Civic VX MPG project (Delete Alternator, add solar)
This project sees the marriage of a 1994 Honda Civic VX and a roof-mounted 135 watt solar panel, charge controller and supplementary battery pack in parallel with the stock car battery and electrical system - the goal of which is to reduce engine load and save fuel by transferring the task of electricity production from the alternator to sunshine. Update: after 5000 miles, the unexpected results are in.
By VXmpgRacer - 70 replies
In forum: EcoModding Central

Stricter EPA testing for 2017 model year - be careful making comparisons   Stricter EPA testing for 2017 model year - be careful making comparisons
EPA fuel economy testing has changed because of manufacturers who were caught using "erroneous" (haha) coastdown methods for measuring aero drag and mechanical resistance. As a result, many 2017 vehicle ratings are lower than the previous year.
By MetroMPG - 13 replies
In forum: General Efficiency Discussion

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 60ís 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 - 169 replies
In forum: Aerodynamics

Ecomodder   Ecomodder's "strange-looking car" Makes the News
"The black 1994 Honda Civic has what looks like white teeth in the front and a funny-looking plastic wing or tail in the back. But the owner has his reasons for his car's odd appearance..."
By Joggernot - 30 replies
In forum: The Lounge

Project: Aero Trailer for TDi   Project: Aero Trailer for TDi
VRdublove writes: "We have a 8000 mile summer tour, and decided to make an aerodynamic trailer to carry our ultralight adventure vehicles. We decided to use a utility trailer as the base, and add an aluminum shell that tapers the bodyshape of the Sportwagen that's pulling it."
By VRdublove - 27 replies
In forum: Aerodynamics

My Ford Ranger - Project Log   My Ford Ranger - Project Log
Nathan01xl is currently averaging around 38 MPG (US) in his 2001 Ford Ranger following numerous changes including the addition of a digital MPG gauge, improved driving technique, and a growing list of efficiency modifications.
By nathan01xl - 146 replies
In forum: EcoModding Central

Personal best on your latest fill-up?  Post it here!   Personal best on your latest fill-up? Post it here!
Members who have recently recorded personal best fuel economy share their results and how they accomplished them.
By MetroMPG - 90 replies
In forum: Success Stories





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