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Under trunk cubby

Posted: Thu Dec 14, 2017 10:49 pm
by OzRob
Hi! I’m a new member! I have a 2018 i3s on order for delivery here in Sydney in a few weeks time and, as a retired auto engineer (GM then Ford) and competent CAD designer/3D modeler I have a plan to improve the trunk space.
I’m not getting the REX version so there’s heaps of space under that floor in the trunk. I’m gonna undo the cover and design/make a plastic trunk extension, accessible when the carpet is lifted. Probably need a harder cover over the space to support the luggage above. Don’t worry! The new part WILL seal!
My questions are “has anyone done this before? If not, why not? And once I’ve done it, would there be a market for me to sell this part to other non-REXers?”
Thanks

Re: Under trunk cubby

Posted: Thu Dec 14, 2017 11:10 pm
by I33t
Hey, that sounds like a good idea.

Interested to hear what it will be made from. Will it be insulated for hot/cold climate, and how easy would it be to install?

Re: Under trunk cubby

Posted: Thu Dec 14, 2017 11:12 pm
by alohart
Such a modification has been proposed by several BEV owners since 2014, but I'm not aware of this modification having ever been implemented. I've been interested in this myself, but I'm not certain that the cubby size would be worth the effort and expense. Designing convenient access to this cubby might be challenging as well. With the trunk floor removed, I also drooled over the space available where the REx muffler would be, but accessing that space would be even more challenging.

Keep us informed about your progress. Good luck!

Re: Under trunk cubby

Posted: Fri Dec 15, 2017 4:41 am
by benjanos
Hi Oz Rob,

I will buy one of these off you immediately. I've been thinking about it for a while but have no skills to create one, it would be great huh.

Only thing I ever found on the internet about it was this article https://bmwi3owner.com/2014/02/heat-pump-in-front/

If you do manage to produce a few PLEASE let me know.

Cheers

Re: Under trunk cubby

Posted: Fri Dec 15, 2017 11:17 am
by jadnashuanh
Sounds like a useful enhancement, depending on the cost and complexity of installation. Shipping from Australia could get expensive, though!

Re: Under trunk cubby

Posted: Thu Dec 21, 2017 10:44 am
by imolazhp
A guy on the i3 FB group made a subwoofer enclosure for the space, he shared the drawings. I would start there if I were you. I hope to do the same (sub enclosure) at some point in the future. Keep us posted.

Re: Under trunk cubby

Posted: Fri Dec 29, 2017 11:16 am
by Hypermiler
There is a rather professional version made by a German

https://www.goingelectric.de/forum/bmw- ... 7-290.html

Page 30, or write to

wolfgang.kern@wokeby.de

Re: Under trunk cubby

Posted: Fri Dec 29, 2017 12:11 pm
by alohart
Hypermiler wrote:There is a rather professional version made by a German
That looks really nice. An English description can be found here.

However, it appears that the only cover over the storage boxes would be the carpeting and its backing. If so, placing anything heavy on the carpet over the storage boxes could be a problem.

I like to support quality products like this, but the shipping cost halfway around the world to Honolulu would be prohibitive. When I think about how we use our i3, I really don't need the additional storage very often, so I don't plan to order this product.

Re: Under trunk cubby

Posted: Fri Dec 29, 2017 8:53 pm
by I33t
The price from Germany for that item is AU$650 plus freight! Given the size, bet the shipping cost is huge.

Nice design except the lack of info about the support below the carpet.

Hopefully OzRob comes up with a better and more economical solution.

Re: Under trunk cubby

Posted: Sat Dec 30, 2017 3:18 pm
by alohart
I33t wrote:Nice design except the lack of info about the support below the carpet.
Another German i3 owner has built a solution that is less expensive (not all welded stainless steel) and has a proper cover that makes accessing the extra storage space much easier. If I could read German, I would read through the very long thread discussing designs for additional BEV storage because there are likely some pretty good ideas discussed.