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Old 07-14-2008, 02:46 PM   #1 (permalink)
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Full Tonneau vs Partial

My truck is often used to haul and a full tonneau is a large pain to deal with for me but the 20 inch cover over the rear, near the tailgate noted in the SAE Truck Aerodynamics Test (2004-01-1146) seemed to offer a good portion of the benifits of a full tonneau. It would be a simple item I could fab up and slap on for my occasional high speed jaunts. Has anyone here tried it? Comments encouraged.

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Jim Allen
The Frugal Four Wheeler and Farmer

My ultimate goal is not necessarily the highest mpg but to make my trucks more efficient configured as I need them.

Old Reliable '86 Ford F-250HD 4x4, 6.9L diesel

Red '00 Honda Accord Coupe, 3.0L V6, automatic

The Plugger '05 Ford F-150HD 4x4, Regular Cab, 8-ft bed, 8,200# GVW, 5.4L V8, automatic, 4.10:1 ratios, 285/70R-17D tires

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Old 07-14-2008, 03:38 PM   #2 (permalink)
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FYI: aerohead posted some info on the rear "half tonneau". Apparently, in combination with a cab roof partial "Kammback" like extension, the increase in efficiency is decent:

Partial tonneau info
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Old 07-14-2008, 04:07 PM   #3 (permalink)
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Thanks, MetroMPG- Did a search on the site but must not have had the terms just right to find that one. Not too much info but a few clues for further research. Thanks!
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Jim Allen
The Frugal Four Wheeler and Farmer

My ultimate goal is not necessarily the highest mpg but to make my trucks more efficient configured as I need them.

Old Reliable '86 Ford F-250HD 4x4, 6.9L diesel

Red '00 Honda Accord Coupe, 3.0L V6, automatic

The Plugger '05 Ford F-150HD 4x4, Regular Cab, 8-ft bed, 8,200# GVW, 5.4L V8, automatic, 4.10:1 ratios, 285/70R-17D tires

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Old 07-14-2008, 06:38 PM   #4 (permalink)
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Blackfly - '98 Geo Metro
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MPGiata - '90 Mazda Miata
90 day: 52.07 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)
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No prob. Here's another tidbit - scroll down to the part about Texas Tech. http://ecomodder.com/forum/showthrea...html#post28176
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Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown



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www.ForkenSwift.com - electric car conversion on a beer budget
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Old 07-14-2008, 06:52 PM   #5 (permalink)
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I found that one already! I'm going to corncob something and test it myself.
BTW, I like your ForkenSwift. Had a chance to spend a week driving Wilde Evolution's Lectro-Rover around Moab back in 2000. Really loved it. Would like to build a little electric for myself someday.

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Jim Allen
The Frugal Four Wheeler and Farmer

My ultimate goal is not necessarily the highest mpg but to make my trucks more efficient configured as I need them.

Old Reliable '86 Ford F-250HD 4x4, 6.9L diesel

Red '00 Honda Accord Coupe, 3.0L V6, automatic

The Plugger '05 Ford F-150HD 4x4, Regular Cab, 8-ft bed, 8,200# GVW, 5.4L V8, automatic, 4.10:1 ratios, 285/70R-17D tires

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