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15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed A collection of mosty small & inexpensive mods, from aerodynamic to electrical to gearing changes (through oversize tires) result in an average 15% mileage improvement in a 2007 Civic. By MetroMPG - 47 replies In forum: EcoModding Central

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 - 50 replies In forum: Success Stories

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 - 75 replies In forum: EcoModding Central

208 km (129 mi.) in EV mode with a 2007 prius plugin 20kWh Planetaire shares his very nice 2nd gen Prius PHEV conversion. By planetaire - 33 replies In forum: Hybrids

Another truck aero cap idea... Follow the evolution of BamZipPow's aerodynamic cap for his 1998 Toyota T-100 pickup. By BamZipPow - 381 replies In forum: Aerodynamics

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 - 187 replies In forum: EcoModding Central

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 - 538 replies In forum: Aerodynamics

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 - 237 replies In forum: EcoModding Central

Replace your car battery with capacitors! A good discussion on replacing a starting battery with ultra capacitors in cars, trucks, and motorcycles. By redneck - 314 replies In forum: EcoModding Central

Recumbent Honda 90 Ironside customizes and aeromods his Honda 90 motorcycle into a recumbent. By Ironside - 155 replies In forum: Motorcycles / Scooters

2005 Prius engine into 1986 MR2: mk1 1nzfxe Prius swap (gas only) Mr220v informs us that used Prius engines are dirt cheap, and therefore fun to experiment with! He swapped one into an MR2, and using the Prius variable cam timing/Atkinson design, he now has variable compression on demand, via a push-button. He's still working out tuning, but fuel economy has gone up a healthy amount, from ~30 to 37 mpg (US). By mr220v - 114 replies In forum: Success Stories

Full-boat-tail trailer with gap-fillers for Toyota T-100 pickup Phil says: "The boat hull is far from ideal but using it will save hundreds of man-hours. Maybe 40 mpg HWY... we'll see. P.S. the trailer is large enough to serve as a rigid tent, for car-camping." By aerohead - 357 replies In forum: Aerodynamics

Heating the transmission with engine coolant A good brainstorming discussion about methods for speeding up the warming of the transmission's gear oil. By Daox - 127 replies In forum: EcoModding Central

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 - 107 replies In forum: Hypermiling / EcoDriver's Ed

Staying cool with out air conditioning Oil pan 4 builds a liquid cooled seat to stay cool without air conditioning. By oil pan 4 - 71 replies In forum: EcoModding Central

Old square sedan kammback Joris documents the construction and testing of a nicely made aluminum-skinned Kammback on his (very squared off) notchback Euro Volvo sedan. The addition is cleverly attached at the drip rails and hinged to preserve access to the factory trunk/boot. By Joris - 74 replies In forum: Aerodynamics

02 G1 Insight with many ecomods- 999.6 mile tank @ 105 MPG The donkey CRX has another epic build, this time with his 1st generation Honda Insight. By The donkey CRX - 133 replies In forum: EcoModding Central

1st Gen Toyota Tundra Aeroshell Build Macskyver chronicles the building of his beautiful wooden aeroshell for his Toyota Tundra. By Macskyver - 195 replies In forum: Aerodynamics

Finally broke 60 mpg (bone stock '95 Honda Civic VX) New member Bugzilla scored a dealer-maintained, bone stock Civic VX and through driving technique alone surpassed 60 mpg (US) on his 4th tank. Next up: vehicle mods! By Bugzilla - 12 replies In forum: Success Stories

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 - 135 replies In forum: Aerodynamics