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Old 06-05-2008, 04:48 PM   #1 (permalink)
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But I love these mud flaps!!

Rear:

Front:


I ordered these and installed them in January of 2000. They have really kept the gunk off the sides of my car..
But with today's gas prices..?..
As you can see, they have a cup-rim around their edges! What could be worse?

My estimate: Each one is costing about 1/4 MPG.. So, I should see a 1 MPH improvement when these are in the re-cycle bin.?.

Or, am I wrong and the flaps should actually help the cd..?.

Comments please:

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Old 06-05-2008, 04:53 PM   #2 (permalink)
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fill the cup with spray foam insulation.. then make a boat tail behind them.. it will make a mudflap that helps MPG
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Old 06-05-2008, 05:00 PM   #3 (permalink)
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Old 06-05-2008, 05:00 PM   #4 (permalink)
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Is the drive mostly city or highway? If mostly city I doubt it will make that big a difference. Don't know where you are located but if it's up north you could always just use them in the winter when the weather is not so good.
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Old 06-05-2008, 05:13 PM   #5 (permalink)
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Quote:
Originally Posted by Lazarus View Post
Is the drive mostly city or highway? If mostly city I doubt it will make that big a difference. Don't know where you are located but if it's up north you could always just use them in the winter when the weather is not so good.
hehe, up north the snow and ice pile up and make ice boattails behind the tires .. mother nature fixing your areo.. to bad they weigh about 20 pounds each and fall off all the time
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Old 06-05-2008, 05:21 PM   #6 (permalink)
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yeah i hate when my natural aero fixes fail
http://ecomodder.com/forum/showthread.php?t=1129
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Old 06-05-2008, 05:31 PM   #7 (permalink)
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How would you like to get off the plane wonder to the parking lot to find this.

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Old 06-05-2008, 05:44 PM   #8 (permalink)
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Quote:
Originally Posted by Lazarus View Post
How would you like to get off the plane wonder to the parking lot to find this.

Plus, he has those crappy roof racks.. At least mine have some semblance of streamlining.
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Old 06-05-2008, 05:45 PM   #9 (permalink)
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Quote:
Originally Posted by ebacherville View Post
fill the cup with spray foam insulation.. then make a boat tail behind them.. it will make a mudflap that helps MPG
I see what you mean.. And it would be easy to fill the cup and top it off with coroplas.. But the boat-tail behind it would be too much work..

Maybe it's best I say goodbye to them..
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Old 06-05-2008, 07:06 PM   #10 (permalink)
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they don't seem to be to aggressive... so thay're likely to be well within the tire wake.
maybe you could swap the front ones lef-rigth so they mount backwards...that seems smoother... or add some small kamback farings around it (as would be the case if they where backwards), so you get a virtual boattail...

mudflaps have a good side in keeping the car clean and undamaged from rocks so if you want that aspect you might just try to optimise them....if not, loose them

also when you don't strictly need them you could take them of and do some A-B testing

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