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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 - 189 replies In forum: Aerodynamics

"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 - 17 replies In forum: Hypermiling / EcoDriver's Ed

VW Lupo 3L --> 2L Vekke has taken one of the world's most efficient cars and is modifying it extensively for even better results. "Best fuel consumption so far is 2.24 L/100km at 80 km/h average speed, which equals 105 MPG (US) at 50 MPH avg. speed." By Vekke - 389 replies In forum: EcoModding Central

Recumbent Honda 90 Ironside customizes and aeromods his Honda 90 motorcycle into a recumbent. By Ironside - 179 replies In forum: Motorcycles / Scooters

Drag reduction modifications in wind tunnel: Audi A2 from Cd 0.288 to 0.204 By Vekke - 60 replies In forum: Aerodynamics

Project: ECOfamily Civic and its Aero Hitch Box / Boat Tail Christofoo says: "This thread will be about my forthcoming hitch-mounted cargo box boat-tail ... maybe the first project thread applicable to a sedan." By christofoo - 222 replies In forum: Aerodynamics

Speed vs. MPG charts (post 'em if you got 'em) The speed at which you choose to drive has the biggest impact on your highway fuel consumption. This fact is nicely demonstrated by this collection of graphs showing the relationship of MPH to MPG in a variety of vehicles, from a 55 hp Geo Metro to a 505 hp Corvette, and many others in between. By bluejoey - 183 replies In forum: Hypermiling / EcoDriver's Ed

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 - 435 replies In forum: Motorcycles / Scooters

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 - 636 replies In forum: Aerodynamics

Replace your car battery with capacitors! A good discussion on replacing a starting battery with ultra capacitors in cars, trucks, and motorcycles. By redneck - 390 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 - 205 replies In forum: Aerodynamics

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 - 82 replies In forum: Aerodynamics

Got 2.25 L/100 km 104.36 mpg (US) at 80 km/h avg speed Vekke's modified Volkswagen Lupo 3L is getting closer to his 2L / 100 km goal (118 mpg US) at 100 km/h (62 mph) average speed. The car currently has a number of major aerodynamic modifications - one of which is just 80 mm of ground clearance - and more are planned. By Vekke - 19 replies In forum: Success Stories

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 - 540 replies In forum: Aerodynamics

1946 Chevy Prius Truck Watch how member Hoopie is integrating a 2001 Prius platform & drivetrain into a 1946 Chevy Truck, with the goal of making the changes invisible to the casual observer. By Hoopie - 291 replies In forum: Hybrids

Shift points: EPA testing of manual transmissions (why beating MT ratings is easier) Find out why it is easier to beat manual transmission EPA ratings than automatic transmission EPA ratings. By MetroMPG - 45 replies In forum: Hypermiling / EcoDriver's Ed

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 - 802 replies In forum: Aerodynamics

Urba Centurion Update - (Kubota diesel, 100+ MPG in mixed driving - Fall 2012 on) Changzuki describes the progress of this diesel-powered custom car, with Triumph Spitfire manual transmission and rear differential. Top speed from the 850 cc Kubota is 65 mph, and it's returning 100+ MPG in mixed driving. By changzuki - 702 replies In forum: EcoModding Central

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 - 331 replies In forum: EcoModding Central

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 - 148 replies In forum: EcoModding Central