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Old 02-16-2015, 09:43 AM   #1 (permalink)
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Air Dam

I am interested in installing an undertray and my car has a factory air dam/chin spoiler. What is the best approach when installing and undertray here? Remove the factory piece and tuck the undertray up under the bumper skin, or tie into the factory piece?

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Old 02-16-2015, 10:02 AM   #2 (permalink)
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I guess it depends on what vehicle you are trying to mod.
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Old 02-16-2015, 10:17 AM   #3 (permalink)
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I guess it depends on what vehicle you are trying to mod.
14 Ford Fiesta ecoboost hatchback
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Old 02-16-2015, 10:48 AM   #4 (permalink)
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Whatever you do should be bullet-proof. My son's SRT-8 came with a factory partial pan under the engine. The front drooped, caught air and tore itself off. And that was a factory part.

I think it comes down to whether it needs to be removable for engine service. Maybe a C-channel to catch the front edge, held forward by the fasteners elsewhere?
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Old 02-16-2015, 11:04 AM   #5 (permalink)
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Whatever you do should be bullet-proof. My son's SRT-8 came with a factory partial pan under the engine. The front drooped, caught air and tore itself off. And that was a factory part.

I think it comes down to whether it needs to be removable for engine service. Maybe a C-channel to catch the front edge, held forward by the fasteners elsewhere?
I like the Idea of having a slot to fit it into, and I certainly want easy access for maintenance. I suppose I could pop rivet an aluminum lip to the back side of the factory piece, which would provide a slot for the pan to slide up into.
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Old 02-16-2015, 07:05 PM   #6 (permalink)
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My son's SRT-8 came with a factory partial pan under the engine. The front drooped, caught air and tore itself off. And that was a factory part.
Probably wasn't refitted correctly by the last person who took it off
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Old 02-16-2015, 09:48 PM   #7 (permalink)
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What do you plan on making your under tray out of? If using coroplast you could use self tapping screws on the front carriage and cut out an access port to get to the oil pan plug. It also depends on how far you plan on letting the under tray extend from the front air dam.
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Old 02-16-2015, 09:56 PM   #8 (permalink)
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What do you plan on making your under tray out of? If using coroplast you could use self tapping screws on the front carriage and cut out an access port to get to the oil pan plug. It also depends on how far you plan on letting the under tray extend from the front air dam.
Coroplast is what I plan on using, but potentially I may use the 4'x8' sheets of the material you would line your shower with. I think it is cheaper and easier to get than coroplast. http://www.homedepot.com/p/PLASTEX-1...3003/202090190

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Old 02-17-2015, 02:43 AM   #9 (permalink)
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You will need to account fer frame flex. I don't think the C channel will hold up as well as you think it should. Also, the shower panels (FRP) will not perform well in a horizontal position and requires close spacing fer the support rails. The 4x8 panels easily weigh in about 30lbs.
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Old 02-17-2015, 08:10 AM   #10 (permalink)
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You will need to account fer frame flex. I don't think the C channel will hold up as well as you think it should. Also, the shower panels (FRP) will not perform well in a horizontal position and requires close spacing fer the support rails. The 4x8 panels easily weigh in about 30lbs.
Noted, thanks.

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