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Old 04-07-2018, 09:41 PM   #251 (permalink)
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Originally Posted by Daox View Post
Woohoo. Glad to hear you got it finished up.

Do you have plans to test its effectiveness?
I'm planning on getting a drag coefficient from coast down testing later this spring (if the weather ever turns decent around here...). For now, this trip to New York/New Jersey should give me an indication it's working or not.

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Old 04-09-2018, 06:36 AM   #252 (permalink)
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I ended up painting it with bedliner. Black+thick covers a multitude of sins; this stuff is UV resistant, abrasion resistant, and impact resistant, so it should hold up well.
The epoxy resin with graphite would have been lighter but not as abrasion resistant I suspect. It would have been very glossy/slippery and not matte finish. I think it would show the flaws a little more as well as being difficult to get a grip on while installing or removing it. I only did a spinner cone, nothing as large as your tail section.

Looks good, but I didn't expect to see the air gap. Guess I wasn't following this as closely as I had thought.
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Old 04-09-2018, 12:17 PM   #253 (permalink)
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The epoxy resin with graphite would have been lighter but not as abrasion resistant I suspect. It would have been very glossy/slippery and not matte finish. I think it would show the flaws a little more as well as being difficult to get a grip on while installing or removing it. I only did a spinner cone, nothing as large as your tail section.

Looks good, but I didn't expect to see the air gap. Guess I wasn't following this as closely as I had thought.
It's still fairly light--I can easily pick it up myself. However, I'm not planning on removing it from the car unless it falls apart (cross your fingers!) or until I build a better version.

I've actually added some bracing now on the sides, to which I'm also going to attach some aluminum paneling to cover the gap. After that, I think I'll make an aluminum spoiler extension to cover the top gap; I need to be able to reach in to open the hatch, so I can't cover it fully. That was one of my stipulations for this project: maintain hatch accessibility. This would have been a lot easier designing the car from scratch to be streamlined!
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Old 04-09-2018, 12:29 PM   #254 (permalink)
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Nice work! I would love to see a video from a chase car of some white tufts on that black box. It could be very revealing. It would be great to see a before and after if you add gap fillers.
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Old 04-09-2018, 03:19 PM   #255 (permalink)
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It would be great to see a before and after if you add gap fillers.


How can you add gap fillers without compromising the visibility of the [stock] tail lights? Consider a combination of wake boards (upper left) and vortex traps (lower right).

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