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Full boat tail on a Matrix   Full boat tail on a Matrix
A gain of ~5 MPG is documented from the construction of this hatch-mounted boat tail on a 2006 Toyota Matrix. The goal of the builder was to preserve access to the hatch and rear vision.
By Weather Spotter - 337 replies
In forum: Aerodynamics

Grill block on a Silverado   Grill block on a Silverado
By darcane - 83 replies
In forum: Aerodynamics

Another Civic VX Kammback with deep roots   Another Civic VX Kammback with deep roots
mloveland78 documents an extensive rebuild of his Civic VX, as well as additional modifications that lead him to regularly getting better than 70 mpg (US) / 3.4 L/100 km on his usual commute in warm weather.
By mloveland78 - 41 replies
In forum: Aerodynamics

Accord aero mods, 4.25% increase, more to come   Accord aero mods, 4.25% increase, more to come
Istas does a handful of aeromods to his 2005 Honda Accord and shares the results of his testing with us.
By Istas - 73 replies
In forum: EcoModding Central

Electric car conversion: Project ForkenSwift   Electric car conversion: Project ForkenSwift
The ongoing story of a super cheap electric car conversion: a $175 Geo Metro combined with parts from a scrapped forklift and used golf cart batteries. This low cost, medium-speed, short range runabout has been on the road now for 6 years in a small Ontario city.
By MetroMPG - 1041 replies
In forum: Fossil Fuel Free

Peugeot 205 5th gear swap (8.2% improvement at constant 50 mph)   Peugeot 205 5th gear swap (8.2% improvement at constant 50 mph)
HypermilerAX demonstrates the potential savings that can come from "gearing up" a manual transmission with a relatively simple 5th gear swap in his dad's 1991 Peugeot 205 diesel.
By HypermilerAX - 20 replies
In forum: EcoModding Central

CRX HF reverse trike project   CRX HF reverse trike project
"groundflyer" and a friend are having fun modifying a 1988 Honda CRX HF into a three-wheeler. The rear side body is being tapered in behind the doors, and the floor pan will be tapered up.
By groundflyer - 149 replies
In forum: EcoModding Central


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 - 34 replies
In forum: Aerodynamics

Import Tuner Magazine : Project Sipper (   Import Tuner Magazine : Project Sipper ('92 Civic VX)
The EcoModder community applauds, analyzes and critiques a fuel economy project based on the already efficient Honda Civic VX undertaken by a traditional performance magazine. (Oof!! The money they spent!)
By Cd - 185 replies
In forum: EcoModding Central

Project: The Electric Booger (budget EV conversion -   Project: The Electric Booger (budget EV conversion - '92 Mazda MX-3)
Mechman600 has joined the ranks of EcoModder members who have built a super-cheap electric runabout by being extraordinarily resourceful. His goals: "Cost: around $2000 - including the price of the car. It will get me to work and back - 6.5 km (4 mi.) each way on 60 km/h (36 mph) roads. My top speed goal is 80 km/h (50 mph) with a total range of 25 km (15 mi.)."
By mechman600 - 274 replies
In forum: Fossil Fuel Free

What is it?  (Spotted: rear engine TDI, custom aero body)   What is it? (Spotted: rear engine TDI, custom aero body)
Member rjacob spotted this custom bodied mystery eco-car on the road in Rochester, NY. It's got a TDI badge on the rear, and that's apparently where the engine resides as well.
By rjacob - 193 replies
In forum: EcoModding Central

Grill Block 2.25% Increase @ 50 mph.   Grill Block 2.25% Increase @ 50 mph.
Sarguy01 documents a lower grille block made from aluminum flashing on his 2005 Honda Civic: "After ABA testing tonight at 50 mph, I got an increase of 1.7% one way and 2.8% increase the other way. Average gain was 2.2%."
By sarguy01 - 64 replies
In forum: Aerodynamics

Project Land Yacht (BMW 5-series EV conversion)   Project Land Yacht (BMW 5-series EV conversion)
Jackbauer starts his next EV build. This time around its a 2001 BMW 5-series using a 13" forklift motor, 1200 amp controller, 15 kW charger, and 34.5 kWh of CALB grey cells.
By jackbauer - 93 replies
In forum: Fossil Fuel Free

SIM-LEI aero EV achieves 84Wh/km @ 100kph - 207 miles on a ~24kWh pack! Cd is 0.19   SIM-LEI aero EV achieves 84Wh/km @ 100kph - 207 miles on a ~24kWh pack! Cd is 0.19
By NeilBlanchard - 41 replies
In forum: Fossil Fuel Free

AirFlow BulletTruck Project (aerodynamic, modified Class 8 transport doubles MPG)   AirFlow BulletTruck Project (aerodynamic, modified Class 8 transport doubles MPG)
Taking a class 8 transport truck from 5.8 mpg (lifetime mileage, at time of purchase) and modifying it to get 14.1 mpg hauling on a cross-country trip is nothing to sneeze at.
By Shepherd777 - 231 replies
In forum: Aerodynamics

Summerizing your car, Ecomodder style   Summerizing your car, Ecomodder style
Check out our list of things to do to summerize your car, and add some info of your own.
By Daox - 45 replies
In forum: EcoModding Central

Dam, It works! (Air dam on Smart Fortwo: 3-4% MPG improvement)   Dam, It works! (Air dam on Smart Fortwo: 3-4% MPG improvement)
In addition to a clear lower grille block and smooth, black wheel covers, Chumly added and tested a simple air dam: "I just made an air dam out of some lawn edging. A-B-A testing shows 3.16% - 4.2% (avg 3.73%) better mileage. It took a whole half hour to make and install it, I should have done this a long time ago!"
By chumly - 47 replies
In forum: Success Stories

I Hit 100 MPG!  (1987 Honda Elite 150 Scooter)   I Hit 100 MPG! (1987 Honda Elite 150 Scooter)
Jimd explains how he passed the 100 mpg mark: "I've owned my 1987 Honda Elite 150 Scooter for 3+ years and always averaged around 70 to 75 mpg, but this year I decided to do a few things to improve my mileage..."
By jimd - 20 replies
In forum: Success Stories

Economy modding my Chevrolet Astro work van (diesel 5-speed conversion)   Economy modding my Chevrolet Astro work van (diesel 5-speed conversion)
JB3 is after maximum effeciency while still achieving maximum usability in his 1989 Astro work van, so he's swapping in a 4-cylinder 5-speed drivetrain from a 1980 Mercedes. Early results showed 29 MPG, where previously the van would do at best, 19 to 22 MPG, and 16 while towing.
By JB3 - 69 replies
In forum: EcoModding Central

Honda Insight Tail Extension Project   Honda Insight Tail Extension Project
What happens when you start with one of the most aerodynamic production cars ever sold and add a custom-crafted tail to make it even more efficient? Initial testing showed an improvement in fuel economy of 10.3% at 56 mph, or tentatively around an 18% reduction in aero drag. With this tail and other aero modifications in place, the car is regularly returning 100+ MPG tanks in every day use in warm weather.
By 3-Wheeler - 524 replies
In forum: Aerodynamics





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