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Old 12-12-2013, 09:49 PM   #1 (permalink)
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Martha - '97 Mazda B2300
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Paver edging air dam question

Just want to apologize in advance.
I know this belongs in the aero section, but for some reason I'm not able to post there...

The lowest part of my pickup is 8" off the ground, and the lowest part of the front bumper is 12" off the ground. I know this would be covered up quite well by the lawn edging lip so many have done here, but it doesn't look oem enough to me.

When I had my Miata I used paver edging as a diy air dam, and it looked great, but it's only 2.5" tall, meaning that 1.5" of dirty underside would stick out below the dam.

That being said, would I see any noticeable gains from using the paver edging on my truck?

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Old 12-13-2013, 11:59 AM   #2 (permalink)
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The OEM air dams improve fuel economy by around 5% or 6%.
But they have to be built for inept drivers to not tear them off on curbs.

Our over sized air dams increase fuel economy as much as 5% over the OEM joke of an air dam and around 10% over nothing at all on cars.

I added a 2/3 air dam - tire spat rig to my truck and it has increased fuel economy at least 1 full MPG. I call it a 2/3 air dam because the center of the air dam does not encompass my low bumper mounted intercooler. So the center of the air dam is just not there.
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Old 12-13-2013, 11:16 PM   #3 (permalink)
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Thanks for the response! As you mentioned, the OEM air dams improve at least 5% over nothing, and I had nothing else to do today, so I figured I'd go for it. I think it turned out pretty well.

I haven't had a chance to see if it actually has helped, but I like it so I think I'm going to leave it so long as it doesn't HURT my mileage lol

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Old 12-14-2013, 12:00 PM   #4 (permalink)
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Trucks are different.
The OEM air dam or chin spoiler on a lot of trucks is a total joke. Offering a 1% to 3% FE increase.
The huge air dam I put on my suburban that covers most of the front has given me about a 5% increase - the easiest 1 MPG I have been able to pick up in a long time.
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1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
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Old 12-14-2013, 08:06 PM   #5 (permalink)
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Yea I saw the picture of that air dam. That brush guard was a great way to go. I'm going to look into something like that.

For the time being, I think I'm going to permanently fill in the holes in the factory air dam above my diy dam with some expanding foam, then bondo over it and repaint the whole thing with some bed liner. Should help some more right?

I also grabbed some rubber seals for the hood that I think I'm going to use to seal off the turn signals. That plus my add-on would give me a solid 8 inch dam

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