Featured projects & topics ...

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1990 Honda CRX Si D15Z1/HF Trans Swap Project   1990 Honda CRX Si D15Z1/HF Trans Swap Project
Lots of Honda efficiency fans dream of a project like this: taking a lean-burn 1.5L engine from a Civic VX, mating it to the tall-geared transmission from a CRX HF and installing them in a nice & relatively aerodynamic CRX shell. The result can be fantastic cruising fuel economy in a package that looks great & handles well too.
By 02ws6 - 42 replies
In forum: EcoModding Central

CARGaerO t   CARGaerO t'ailer; a hitch-mounted boat tail (Pontiac Vibe)
Tango Charlie explains: "I've decided to make a truncated boat tail for my Vibe, mounted on the hitch-mounted cargo carrier that I made a while back. I priced some aluminum sheets at a nearby RV surplus yard and nearly gave up on the idea until I remembered that Coroplast was only $12 a sheet."
By Tango Charlie - 80 replies
In forum: Aerodynamics

97 Ranger aero project.   97 Ranger aero project.
Old Mechanic has begun an ambitious aeromodding project on a 1997 Ford Ranger 5-speed pickup. He has already surpassed 30 MPG (US) - blasting the truck's 24 MPG EPA highway rating out of the water.
By user removed - 103 replies
In forum: Aerodynamics

SMCC Montreal Economy Run - June 9th, 2012   SMCC Montreal Economy Run - June 9th, 2012
By nerdboy - 141 replies
In forum: Events & Meet-ups

2011 Prius to get full boat tail w/ faired trailer   2011 Prius to get full boat tail w/ faired trailer
The plan is to modify a small utility trailer that reduces overall aerodynamic drag below that of the car alone. The improvement must be enough to more than offset the extra weight and rolling resistance of the trailer. "It'll be fun! Maybe low 60's MPG in straight interstate highway motoring."
By aerohead - 74 replies
In forum: Aerodynamics

MTSU Students Retrofit Hub Motors (Converting an Accord into a plug-in Hybrid)   MTSU Students Retrofit Hub Motors (Converting an Accord into a plug-in Hybrid)
Here's an interesting approach to converting a front wheel drive Honda Accord into a plug-in hybrid by adding hub motors to the existing rear brake drums, plus lithium batteries and electronics in the back of the car. The inventors figure the kit doubled fuel economy, and could be commercialized for around $3000.
By NeilBlanchard - 88 replies
In forum: Hybrids

Roof rack or trunk rack? (solution: none of the above... modded trunk!)   Roof rack or trunk rack? (solution: none of the above... modded trunk!)
Jakins came to EcoModder looking for advice when he saw his car's highway mileage fall by 4-5 MPG when carrying BMX bikes in the trunk forced the trunk lid to remain part-way open. He came up with a creative solution with an angle grinder and a junk trunk lid that lets him close it while still fitting 4 (!) bikes in back.
By Jakins - 48 replies
In forum: Aerodynamics


What   What's your best motorcycle MPG?
Lots of EcoModder members own motorcycles for commuting, for play or to as primary vehicles. In this long thread, owners chime in with their best numbers: what (and how) they were riding to achieve great MPG.
By MetroMPG - 398 replies
In forum: Motorcycles / Scooters

10-15% reduced consumption after "engine split" (physically deactivating 2 of 4 cyl.)   10-15% reduced consumption after "engine split" (physically deactivating 2 of 4 cyl.)
When a bearing went in this Fiat's worn out engine, JohnAh tried something that many have thought about but few have attempted: for fun, he implemented his own "variable displacement" modification ... by physically removing two pistons! "To my big surprise and happiness, not only did the engine start and run, it kept on running for over 40,000 more kilometers." This thread includes a video of the car in action.
By JohnAh - 42 replies
In forum: Success Stories

Buying a bike for MPG/Vetter Challenge, what would be your favorite?   Buying a bike for MPG/Vetter Challenge, what would be your favorite?
This thread takes a comprehensive look at which motorcycles make the most competitive (efficient) platforms for winning fuel economy competitions in demanding "real world" driving conditions.
By beatr911 - 116 replies
In forum: Motorcycles / Scooters

AndrzejM   AndrzejM's Toyota Previa ecomodding thread
By AndrzejM - 4 replies
In forum: EcoModding Central

Just saying hi & introducing myself & my wonderful machine (boat tail CRX HF, 70 MPG)   Just saying hi & introducing myself & my wonderful machine (boat tail CRX HF, 70 MPG)
By scivicblu83 - 22 replies
In forum: EcoModding Central

1.0L Geo Metro engine swap into 1990 Mazda Miata!   1.0L Geo Metro engine swap into 1990 Mazda Miata!
The goal of this low-budget project was "a 50 MPG car that looks cool."
By 1337 - 30 replies
In forum: EcoModding Central

basjoosing the Toyota T-100 (articulated front wheel skirts)   basjoosing the Toyota T-100 (articulated front wheel skirts)
Phil Knox has been optimizing the aerodynamics of his vehicles longer than just about anyone - he's been modifying his Toyota T-100 pickup for years. Now he's constructing articulated front wheel skirts, using a similar approach to the AeroCivic.
By aerohead - 43 replies
In forum: Aerodynamics

CRX HF Trans Swap in a Civic Wagon (1800 RPM @ 60 MPH vs. 2800, and ~19% better MPG)   CRX HF Trans Swap in a Civic Wagon (1800 RPM @ 60 MPH vs. 2800, and ~19% better MPG)
This is a detailed look of the results of swapping a CRX HF transmission into a Civic wagon. (The HF had the tallest final drive available.) The goal was to improve highway cruising efficiency, and early results are good on a recent trip: "I got something like 44 MPG. That's a pretty good improvement from the 37 MPG this car used to get at those speeds."
By Gasoline Fumes - 8 replies
In forum: EcoModding Central

2012 Vetter Fuel Economy Challenges   2012 Vetter Fuel Economy Challenges
Craig Vetter announces the Schedule for 2012 Vetter Fuel Economy Challenges: "This is where we find out how our motorcycles compare with each other in real driving conditions. As you can see, I am doing my best to be in your neighborhood."
By cvetter - 100 replies
In forum: Events & Meet-ups

2nd Gen Prius PHEV Conversion (Enginer plug-in lithium ion battery kit)   2nd Gen Prius PHEV Conversion (Enginer plug-in lithium ion battery kit)
How do you improve the efficiency of Toyota's already class-leading Prius hybrid? One way is by installing additional grid-charged battery capacity so the car can use electric drive/assist more often. Follow forum member Daox as he installs, debugs, improves and monitors the effectiveness of this plug-in project.
By Daox - 333 replies
In forum: Hybrids

Any interest in Vehicle Drag Calculator? (Android App)   Any interest in Vehicle Drag Calculator? (Android App)
ajohn7211 writes: "I'm doing a project for a comp sci class and am wondering if anyone would be interested in a program for their Android phone (or tablet) that would help calculate the drag coefficient for their vehicle? It would involve inputting the weight of the vehicle and running a couple tests on flat road."
By ajohn7211 - 15 replies
In forum: Aerodynamics

Observing a 3 mpg+ gain (~6% improvement) with Energy Saver A/S tires   Observing a 3 mpg+ gain (~6% improvement) with Energy Saver A/S tires
F8L has tried 3 sets of tires on his 2012 Prius: "I just thought I would post up my recent results after switching to the Energy Saver A/S. Here's what a good set of tires can do for fuel economy..."
By F8L - 21 replies
In forum: EcoModding Central

Geo Metro plug-in parallel hybrid EV - in progress   Geo Metro plug-in parallel hybrid EV - in progress
Coyote X put an efficient Metro XFi drivetrain into a convertible Metro body, and added electric chain drive to one of the axles. Not satisified with the results, he recently began moving the XFi drivetrain into a mid-engine, lightweight kit car car chassis. He's planning a new approach for the electric drive components as well.
By Coyote X - 150 replies
In forum: Hybrids





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