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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 - 179 replies
In forum: Aerodynamics

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

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 - 7288 replies
In forum: Open ReVolt: open source DC motor controller

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

CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch   CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch
NeilBlanchard has begun the construction process to build the full-sized prototype of his aerodynamic 5-passenger electric car he's nicknamed "CarBEN EV5". The prototype is being assembled with rigid foam sheets cut on a CNC machine.
By NeilBlanchard - 732 replies
In forum: DIY / How-to

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 - 1223 replies
In forum: General Efficiency Discussion

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 - 2259 replies
In forum: The Lounge


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 - 608 replies
In forum: For Sale

Replace your car battery with capacitors!   Replace your car battery with capacitors!
A good discussion on replacing a starting battery with ultra capacitors in cars, trucks, and motorcycles.
By redneck - 330 replies
In forum: EcoModding Central

Lean burn Honda Civic sedan: 93 Civic d15z1 swap into LX 4 door (VLX)   Lean burn Honda Civic sedan: 93 Civic d15z1 swap into LX 4 door (VLX)
4-door efficiency: slownugly is buttoning up this project where he took the lean burn engine from the iconic Civic VX and swapped it into a sedan body. "Goals: 50 MPG average while maintaining stock appearance. It will be the economy sedan Honda never made in this generation."
By slownugly - 182 replies
In forum: EcoModding Central

Automatically actuated grill block - Mk3   Automatically actuated grill block - Mk3
Daox designs an automatically actuated grill shutter. The design is nearly fully 3d printed and controlled via an arduino.
By Daox - 139 replies
In forum: Aerodynamics

Recumbent Honda 90   Recumbent Honda 90
Ironside customizes and aeromods his Honda 90 motorcycle into a recumbent.
By Ironside - 164 replies
In forum: Motorcycles / Scooters

Commercially produced aerodynamic pickup bed cap   Commercially produced aerodynamic pickup bed cap
Brett Herndon is a genuine craftsman who has combined his skill in clay modeling with his knowledge of aerodynamics to produce a professional quality aerodynamic truck cap which will literally pay for itself in gas savings. It's unlike anything you've seen before: it can be used as a big hatchback, transformed into a conventional box cap, or have its top removed to make room for oversize loads. Brett is taking his handiwork into commercial production, and is a success story waiting to happen.
By MetroMPG - 540 replies
In forum: Aerodynamics

t vago   t vago's MPGuino workspace thread, continued
Check out t vago's continuous enhancement of the multi-featured MPGuino fuel economy computer / gauge.
By t vago - 166 replies
In forum: OpenGauge / MPGuino FE computer

Tall tire test (taller gearing advantage offset by wider, heavier wheels/tires?)   Tall tire test (taller gearing advantage offset by wider, heavier wheels/tires?)
Taller tires mean reduced cruising RPM, which is good for fuel economy. But what if the taller wheels/tires are also wider (which increases aero drag) and heavier? SentraSE-R tested his Scion Xb to find the answer.
By SentraSE-R - 97 replies
In forum: EcoModding Central

"Short-shifting" a Jeep Patriot & Audi A4 CVT (forcing early "upshift") saves gas   "Short-shifting" a Jeep Patriot & Audi A4 CVT (forcing early "upshift") saves gas
Does your car's automatic transmission have flappy paddles? What about a manual shift gate or shift buttons on the steering wheel? If so, you may be able to save fuel by wresting control from the computer over your upshifts. MetroMPG shares his experience in a Jeep and an Audi.
By MetroMPG - 16 replies
In forum: Hypermiling / EcoDriver's Ed

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 - 849 replies
In forum: General Efficiency Discussion

Project 100 (custom enclosed Honda C90 targets 100 mph vmax and 100 km/L FE)   Project 100 (custom enclosed Honda C90 targets 100 mph vmax and 100 km/L FE)
Forum member visionary is custom-building an enclosed motorcycle with the goal of achieving 100+ mpg at its cruising speed of 70 mph, from an engine displacement of 100 cc.
By visionary - 385 replies
In forum: Motorcycles / Scooters

PICS! Econo Car conversion to Kubota Diesel.  1997 Geo Metro, Kubota D1005 3 cylinder   PICS! Econo Car conversion to Kubota Diesel. 1997 Geo Metro, Kubota D1005 3 cylinder
Planejob is making great progress on dieselizing his Metro. His goal: "I want something that seats 3, sounds like a tractor, gets great mileage, and looks insane (aero mods)." No doubt that's going to happen.
By planejob - 238 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 - 111 replies
In forum: Hypermiling / EcoDriver's Ed





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