Quick & Easy Kammback for Metro
 

I bought some clear acrylic sheet and was going to fabricate some kind of Kammback following the guides here but then I got lazy. I just eyeballed it, drilled some holes and put in some rivets... The acrylic cracked a bit when riveting but hasn't gotten any worse since driving. Rust will undoubtedly form at the holes too... Works well enough for me but I don't know what effect it has on fuel economy yet.

Attachment 5549

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Hello T Durden and welcome to EcoModder :)

That is indeed a simple Kammie, and it appears you got the top angle on the dot at 13-14deg. I'm not sure about the sides, though. The inward angle seems quite steep which may effect the wake. I guess you're not willing to unrivet and rivet on the side of the road while A-B-A testing? ;)

BTW: Those skirts look nice (the shape, not the rust). How long have you been using them? Are they easy to take off/put on?

T Durden -

Welcome to EM! I like it. I measured a 12.8 degree slope. Can you tell me the thickness of the acrylic? If I were you, I would seal any gaps that could allow air to sneak under the kammback. In the last picture, it *appears* that there could be a small hole where the acrylic slopes from the rear hatch "roof" to the rear hatch pillar.

CarloSW2

Welcome T Durden, don't start any fights in here ;)

GAffers tape, or even Duct Tape (if you don't mind the residue) would be a quick and cheap way to seal up the edges of that kammback.

I'm curious about those rear fender skirts too - is that corrosion from years of use on your car? Or did they go on that way?

Looks like a worthwhile experiment.

I like the skirts. Are they easy to remove? Looks like a good pattern.

Are those front caps rusted pizza pans, or just a rust colored material?

im pretty sure its rust bro. rust sucks. nice skirts though

Welcome to the forum.

Thanks for the compliments on the skirts! They've been on the car for just a few months. I think I screwed up the painting, not cleaning them well enough before priming. They are easy to remove though, just a few "self tapping" screws holding them on.

The acrylic is about 1/8", 3mm thick. Yeah, doing A-B-A might be a little difficult, haha.
Yes, there are definitely some holes letting air under it, I'll tape 'em up!