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Old 05-28-2007, 04:03 PM
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tailgate open or closed

i have a question for u truck people i have a s-10 and i have been told it is good to keep the tail gate open for better aerodynamics but i have also been told that the truck is designed to run it with the tail gate up and if u keep it down that it drags and creates worse aerodynamics so does anyone know if it is better to keep it up or down. or should i put a tonneau cover on it?


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Old 05-28-2007, 04:56 PM
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I think Mythbusters did a test on this and it proved to not restrict the air flow, something to do with the way the air swirls around in the back when the tailgate is closed.
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Old 05-28-2007, 05:02 PM
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closed works better.
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Old 05-28-2007, 06:37 PM
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More than one test has proven that closed is less drag than open because of the drag from the cab. If the gate is open then there is a large low pressure area that develops behind the cab but if closed then the air tends to flow over the gate and there is then less drag on the back of the cab from this low pressure, or at least that was the way they explained it.
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Old 05-28-2007, 07:16 PM
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this is what mythbusters came up with the model truck in that episode
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Old 05-28-2007, 07:25 PM
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Leaving it up is much better, BUT Mythbusters also did an episode with different tailgate products to reduce drag like tonneau covers, the "net" tailgate, taking the tailgate off, etc. The net tailgate actually performed better than anything else. Too bad that thing looks incredibly goofy.
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Old 05-28-2007, 07:27 PM
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closed is good. cover is better. hard cover is best = more weight for added traction.
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Old 05-30-2007, 01:53 PM
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You ever seen an old truck going down the road without a tail gate and you notice that the sides of the bed are bent inward. Susprisingly the tail gate is a semi structural part of the bed. Think of a box. Box is much stronger with 4 sides than with 3.
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