4wd BMS i3?

[anonymous-user]

So, my ideal next car, take two i3s and Frankenstein them together, into a >300bhp 4wd one......

Anyone know:

1) how much would you expect to pay for a salvaged i3??
2) what the front suspension is (any chance of finding some drive-through hubs/uprights that would bolt up?, ie from a Mini or similar??)
3) Is the inverter packaged in with the traction motor
4) what the architecture of the battery pack is (voltage & series / parallel cell allocation?)

[anonymous-user]

DOH, typed "BMS" in title and not "BMW"........

(blame all afternoon talking about Battery Management Systems...........!!)

[anonymous-user]

Looks like the front struts would have to be changed for shorter ones as they have sunk the lower end of the damper cartridge down below the axle centre line of the upright, but that wouldn't be too hard. The steering rack looks like more of a problem, and looks like it would be in the way of a front motor install though.......

[anonymous-user]

Luther Blisset said:

Max_Torque said:

they have sunk the lower end of the damper cartridge down below the axle centre line of the upright,

Why would they do that exactly?

To be able to package a nice long travel strut in a low overall package! You want a long strut for any given travel because the greater "Overlap" means greater stiffness (bending) which is critical for a strut, where it carried large bending loads under lateral and longitudinal wheel loads. With a non-drive through upright it's easy, you just drop the strut down through the clamp, but with drive through you'll have a CV/Shaft in the way, which makes it tricky (at the front where you need to control your vertical steering axis. (at the back, you can just offset the strut longitudinally to miss he shaft, for example, see the rear suspension of a scooby etc)

[anonymous-user]

Looking at it, when no REX is installed,there is space for another motor in the back:





But i fancy 4wd and the ability to do electronic torque sharing........

Edited by anonymous-user on Friday 15th July 15:41

[anonymous-user]

AER said:

It's not beyond your ability to design a new multi-link front suspension package to go with the new motor and steering geometry, Max...?

no it isn't, but my record on finishing things isn't brilliant..... ;-)

Struck me that one could turn a second motor / trans assy upside down, lock the diffs on both, and run with two motors across the back, with electronic cross axle torque control, which would be easy to do! Use a gateway module between the vehicle and the two inverters to do torque sharing and cross axle cornering speed control, so it still thinks it's just talking to just one inverter.