I33t
Posts: 894
Joined: Fri Dec 13, 2013 3:01 pm
Location: Australia

Re: Under trunk cubby

Sat Dec 30, 2017 4:12 pm

Several in that forum, from an Ikea plastic box, through to aluminium and stainless versions.

The stainless was on offer in November. Looks good, but also not cheap, 439.99 €. Imagine the freight would also be expensive to here in Australia !

https://drive.google.com/file/d/1s6C4Vk ... 62tb-/view
2014 BMW i3 BEV deposit placed 19th Dec 2013
Delivered in Melbourne 4/12/2014. Arrived locally 11/12/14, with 24km on the clock.

Hypermiler
Posts: 5
Joined: Mon Jan 09, 2017 12:27 pm

Re: Under trunk cubby

Sat Dec 30, 2017 4:50 pm

Am in no way related to these guys and have a REx myself.

Looks like professional grade (PU coated stainless steel) to me. The earlier version referred to is a prototype of the same thing.

At any rate, as there is no VAT (19%!) for exported goods, I would guess that the item including shipping would be similar.

imolazhp
Posts: 244
Joined: Sat Mar 28, 2015 8:02 pm

Re: Under trunk cubby

Tue Jan 02, 2018 4:40 pm

alohart wrote: 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.
I think there are websites that will translate for you if you really want to read through them. Thanks for the link, looks like some great ideas.

This was my favorite (joking).
Image

Just cut a hole and slide this plastic container in there, lol. He actually has it braced in another photo but still, wouldn't do this to my i3.

OzRob
Posts: 9
Joined: Thu Dec 14, 2017 10:41 pm
Location: Sydney Australia

Re: Under trunk cubby

Fri Jan 12, 2018 8:53 pm

Thanks for the info about Wolfgang’s work. I’ve emailed him to get a shipping price - I wouldn’t be deterred by what he’s asking for the part itself and it looks well developed.
One issue that would stop me ever selling one in the US (and ought to stop anyone selling them anywhere else, except we have fewer litigious people) is that in a rear end crash, the trunk floor forms part of the crash structure. I.e. when the rear crumples, the metal floor of the trunk resists intrusion and stiffens the shell. Taking that away and fitting a plastic replacement- well, I’d do it myself, but...

I33t
Posts: 894
Joined: Fri Dec 13, 2013 3:01 pm
Location: Australia

Re: Under trunk cubby

Fri Jan 12, 2018 9:16 pm

Given the various options, OzRob are you still going to make them?

If there is an issue of strength, (I kinda doubt it because they are only screwed in with a few screws..), how about making one using carbon fibre? Would be done with a mold and would be at least as strong as the original if the engineer knows his stuff. Would be lighter than the stainless one from Wolfgang and could be designed more like the original boot floor cover.
2014 BMW i3 BEV deposit placed 19th Dec 2013
Delivered in Melbourne 4/12/2014. Arrived locally 11/12/14, with 24km on the clock.

OzRob
Posts: 9
Joined: Thu Dec 14, 2017 10:41 pm
Location: Sydney Australia

Re: Under trunk cubby

Fri Jan 12, 2018 10:29 pm

Carbon fibre would be awesome - great idea. As far as the strength in rear end collisions is concerned, well the steel (I assume) panel might only be bolted down but those bolts are in sheer and the panel is in compression giving very high strength in the horizontal plane with little bending. Also when the steel does crumple, energy is absorbed which, unless you want to wear a neck brace for the rest of your life, (or worse) is worthwhile.
Once I get my car I’ll start pulling it to pieces (hey, it only cost $85k!) but I do that to any new car, and see what to work on first. Maybe the front (frunk) - gotta be loads more space there.
In the meanwhile, I’m tiling my garage floor to create a specific charging area!
Btw elsewhere on the forum I’ve seen debates around public charging vs home charging. With the price of electricity here (Sydney Australia) my first choice will be public chargers, which are largely free. Certainly the one at my local BMW dealer is, and it’s solar powered. And that makes so much more sense than using coal fired electricity from Energy Australia at home!
Robbo

I33t
Posts: 894
Joined: Fri Dec 13, 2013 3:01 pm
Location: Australia

Re: Under trunk cubby

Fri Jan 12, 2018 11:43 pm

It's an awesome car.

Will be interested to hear your process. We had our garage grinded flat and finished with epoxy finish. Nothing special done for the i3 area other than the charger install.

We also added solar to our roof, so we are kW neutral for the whole house including the i3. Wouldn't like to be charging from Coal :(
2014 BMW i3 BEV deposit placed 19th Dec 2013
Delivered in Melbourne 4/12/2014. Arrived locally 11/12/14, with 24km on the clock.

alohart
Posts: 2144
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Under trunk cubby

Sat Jan 13, 2018 5:33 pm

OzRob wrote:As far as the strength in rear end collisions is concerned, well the steel (I assume) panel might only be bolted down but those bolts are in sheer and the panel is in compression giving very high strength in the horizontal plane with little bending.
The motor cover in our 2014 is made of a composite. I don't know whether it is CFRP or just fiberglass. The screws that attach it screw into neoprene nuts with a tightening torque of only 1 Nm. Can't be much collision protection in this setup, so I wouldn't worry about any 3rd-party replacement that provides additional storage.

I believe later i3's have a sheet aluminum rather than composite cover (cost-cutting?).
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

imolazhp
Posts: 244
Joined: Sat Mar 28, 2015 8:02 pm

Re: Under trunk cubby

Sat Jan 13, 2018 5:38 pm

It’s CFRP Art, same as your roof. Probably stronger than it looks but I don’t think that piece is made for crash protection.

alohart
Posts: 2144
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Under trunk cubby

Sat Jan 13, 2018 7:47 pm

imolazhp wrote:It’s CFRP Art, same as your roof.
Makes sense. BMW has lots of CF scraps left over from making the passenger cell, so why not use them to make the motor cover? Maybe this was costly enough that BMW decided to start using aluminum sheet instead in later i3's.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

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