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Old 11-04-2015, 10:01 PM   #1 (permalink)
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30 mpg Ranger Supercab

In June I bought a 2011 Ranger XLT Supercab with the 2.3 4 cylinder and 5 speed manual. It's 2wd. At 60 it gets 30 mpg. At 70 it gets 27. I drive mixed in town and rural delivering pizza getting 20mpg, so I'm not often at highway speed. I'm thinking of just adding a flat bedcover with treated plywood. It would be nice to keep the snow out of my trucks bed. Would I see an increase with the bedcover?

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Old 11-05-2015, 05:03 PM   #2 (permalink)
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bedcover

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Originally Posted by Flyinghippo View Post
In June I bought a 2011 Ranger XLT Supercab with the 2.3 4 cylinder and 5 speed manual. It's 2wd. At 60 it gets 30 mpg. At 70 it gets 27. I drive mixed in town and rural delivering pizza getting 20mpg, so I'm not often at highway speed. I'm thinking of just adding a flat bedcover with treated plywood. It would be nice to keep the snow out of my trucks bed. Would I see an increase with the bedcover?
here is the drag table for GM's bedcover which includes data for a full cover.
The C-10 pickup they tested had around Cd 0.535.You can see the change the cover provided.
On a percentage basis,the best you could probably see is this percentage change.
Your Ranger is much 'cleaner' than the C-10,and the gain from the bedcover might be less.
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Old 11-05-2015, 05:19 PM   #3 (permalink)
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Sorry I'm confused looking at that attachment. I'd make a full length bedcover.
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Old 11-05-2015, 05:32 PM   #4 (permalink)
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The drawing shows that a full length cover is worse aerodynamically than one that covers only the last 50%.
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Old 11-05-2015, 05:42 PM   #5 (permalink)
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I'd rather keep the snow out it will be a full length cover.
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Old 11-05-2015, 06:15 PM   #6 (permalink)
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Sorry I'm confused looking at that attachment. I'd make a full length bedcover.
At the bottom right of the table,you'll see data for the 100% length (full) cover.
The drag coefficient change around 0.032
Starting at Cd 0.535,the full cover got GM to around Cd 0.503.
That's a 5.9% drag reduction,and good for about 3% better mpg.
That's as much as you could hope for basically.
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Old 11-05-2015, 06:28 PM   #7 (permalink)
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3%= then maybe 1 mpg on the highway and almost nothing in mixed driving. At least I'd keep the snow out. If I had more $$ I'd make an aero curved sloping back topper out of lexan or similar.

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