11-18-2011, 06:37 PM
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#11 (permalink)
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Master EcoModder
Join Date: May 2009
Location: Charlotte NC / York SC
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Tailgate up with a full size truck box and grill block are how I get the 1 ton to do 21MPG
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 Today
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11-22-2011, 02:49 PM
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#12 (permalink)
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EcoModding Apprentice
Join Date: Mar 2010
Location: Los Angeles
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Well i finally did a-b-a runs and yes, i still only got a 10mph increase with tailgate down.Same hill, same start speed going downhill, as always,no traffic in front or beside me to mess with results.So,there you go, Tailgate up!!!!
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11-22-2011, 03:09 PM
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#13 (permalink)
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Master EcoModder
Join Date: Jul 2011
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Wait, is it faster or slower with the tailgate in the upright position?
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11-22-2011, 03:17 PM
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#14 (permalink)
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mostly harmless
Join Date: Oct 2009
Location: Central AR
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Tailgate down creates a lot of drag, as the air is striking downward on the tailgate that far back. Removing the tailgate helps, but the rear-tonneau cover option is what I understand creates the best truck bed aero solution.
If I get to keep Earl (please please please... I may have to sell him to cover the HHR's down payment) I really want to play with some ideas.
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11-22-2011, 08:26 PM
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#15 (permalink)
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EcoModding Apprentice
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Location: Los Angeles
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Quote:
Originally Posted by kach22i
Wait, is it faster or slower with the tailgate in the upright position?
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Ok,,a was tailgate down, b was tailgate up, a was tailgate down. A-10, b-17, a-again was 10mph. Corrected now."This is my final answer" LOL |
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11-22-2011, 08:30 PM
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#16 (permalink)
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EcoModding Apprentice
Join Date: Mar 2010
Location: Los Angeles
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So what other light weight, inexpensive mat'l can i use to make a tonneau cover?
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11-22-2011, 08:34 PM
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#17 (permalink)
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Pokémoderator
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sc2dave -
This isn't a good side view, but I think it's representative :
Tailgate up is definitely closer to the ideal.
CarloSW2 |
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11-22-2011, 10:34 PM
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#18 (permalink)
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Master EcoModder
Join Date: Jul 2011
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Quote:
Originally Posted by sc2dave
So what other light weight, inexpensive mat'l can i use to make a tonneau cover?
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In Ann Arbor there is a place called "The Scrapbox". People and companies donate materials, other people (and teachers for student projects) buy these items at little cost. It is a non-profit and is very popular with the arts & craft crowd.
If you have anything like this in your area just go there and see what they have. |
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11-23-2011, 05:10 PM
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#19 (permalink)
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EcoModding Apprentice
Join Date: Mar 2010
Location: Los Angeles
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Never heard of these places in my area. Anyone else have any other good suggestions?
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11-23-2011, 05:37 PM
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#20 (permalink)
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mostly harmless
Join Date: Oct 2009
Location: Central AR
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There are, in most cities I've lived in, stores that specialize in overstock and other cheaper-than-retail building materials. I know of a couple places in Tuscaloosa that are everything from a thrift store to a discount building supply center. They're often run by charity organizations, so you may check around with them.
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