[WIP] 1990 MX5 to tesla power

[ScythianNite]

I guess after 2 years of starting the project, I should probably start documenting it as a way to bully myself into finishing the final bits.

To begin, after about a year of playing with CAD and some other measurements, I was able to determine the following parts list:

tesla m3 drive unit in rear subframe (currently controled by ingenext controller, hopefully I will be able to control by open source solution in time)
16x Taycan battery modules into a single battery box
Model S gen2 front and rear hvjb with tesla 3/y NACS port
Tesla Gen2 obc with OI board and i3 LIM for DCFC (potentially etron 11kw charger? i have in hand and hope to be able to contribute to pushing that along as i develop my skillset)
all to be controlled by zombieverter vcu.


backstory: overall I have owned this car since 2015 and after 110k miles of daily driver use it finally gave up the ghost. I knew I was going to swap or rebuild+turbocharge and my overall goals were around 250-300hp with reasonable reliability. I, like others, watched the development of tesla swaps and other OEM based conversions and after buying my first OEM EV in 2020 I realized that I wanted everything with no comporomises for my little miata. In 2021 I started looking into options, and how to use CAD, and in 2022 I started buying my parts. 2 years and hundreds of hours of learning later and I'm finally trying to get this thing on the road.

this has not been a cheap project, but I'm doing all the work myself to learn and I'm not really in a rush to get things done even if I really really want to drive this thing again. I'm starting with a 247k mile first year Miata, and I intend to try and get it to 500k miles if I can.

[ScythianNite]

Model3 Drive unit in modified rear subframe:

initial CAD placement:

Frame minus motor in car:

[ScythianNite]

Thanks to Chris at Fellten for the file, I was able to use a 3d scan + my own measurements to tetris in the battery design

i have 3mm x 25mm flat copper bar to start building my busbars with, as well as the overall busbar designs which I will likely 3d print first to confirm fitment. I am looking into nickel plating options locally but may end up sending an order out to get the files i made done up by professionals lest I do something poorly or wrong.