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Discussion Starter · #1 ·
Hello all
looking into converting my wifes BMW X3 into an electric commuter car, for school and grocery runs.
we live just outside of a smaller city, so a 30 Mile range would be more than sufficient for our needs.

we do have a good amount of snow in the winter, so I would like to keep the AWD, but I'm sure the Auto Box has to go.

is it a good idea to go transmissionless and just use the transfer case? or do I have to look at a manual conversion before I swap to electric?

engineering and fabricating parts are a daily process for me so that end of things is fine, though I have never attempted an electric conversion before, if the information is written down and replicable I know I can make it work.


as a side not and introduction to me personally, I design distillation systems and consult on spirits production, so CAD is my daily tool of choice, and have a miriad of sub contractors and specialists available to manufacture any part i can draw up. picture below is such a (small) system that I am assembling for use in R&D.

Cylinder Gas Machine Metal Nickel
 

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Sounds like a biodiesel conversion would be up your alley, including a veggie oil fuel setup at the house...

Your range requirement makes battery stuffing a lot easier.

The AWD gets tricky. If that wasn't a necessity, you'd have some easier choices.
 

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You can do AWD the same way that every single AWD production EV does it (a separate drive unit for each axle), or you can keep all of the bulk, complexity, and inefficiency of the AWD system designed to work with one engine. If you keep the existing system, just replacing the engine with an electric motor (or just replacing the engine and original transmission with an electric motor and simpler transmission), the AWD system won't matter (except that it will be in the way of mounting battery modules).

Whatever the electric drive system solution, you should have no problem building a very nice cooling system for it. :)
 

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Discussion Starter · #4 ·
You can do AWD the same way that every single AWD production EV does it (a separate drive unit for each axle), or you can keep all of the bulk, complexity, and inefficiency of the AWD system designed to work with one engine. If you keep the existing system, just replacing the engine with an electric motor
thats a good point, I hadnt given that thought.
 
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