EV conversion Dual Tesla model 3 drive train front / rear motor swap ??

[hansvwtesla]

Hi Guys,

I am on the verge of starting a VW splitscreen 4x4 project and connecting some of the last dots...

I am not looking for endless horse power but I am looking for driving the Splitty on the beach and off-road so that the main reason for 4x4.

I think i can put it al in the van but I will need to use the Tesla model 3 front-motor in the rear and the rear motor in the front....
This is because the direction of the motors are mirrored and in this way I have the 'electric motor' in the position where I can create space.

So now my question !!
What could go wrong ?
The front motor will be more powerfull and most likely drive 70% of the car... and the rear motor will assist the car when driving offroad (losing traction ) and when I want to be ridiculously fast...

But wil there be problems in cornering or at high speeds... Having the rear motor in the front.... should make it a front wheel powered car... which it not really a problem i believe.... ?
My Last rear wheel powered VW with a tesla model 3 motor in the rear... was pretty dangerous to drive in the rain... a bit of heavy foot would make the back break out.... This should be better with front wheel drive...

Love to hear you thoughts

Hans

[P.S.Mangelsdorf]

I don't think there's any real concern here - especially if you're waiting to use OI/EVBMW control for the M3 drive units, as you'll be able to tune/adjust power as needed. I'm not sure how the commercial Model 3 controllers would handle this situation - if you're using those, probably best to reach out to them. I reached out to one regarding their Model S 2021+ controller with technical questions for a planned build and they were helpful.

[hansvwtesla]

I intend to use the EV-controls or ingenext controller.. So I can also manage the Battery pack. I can adjust the power but not individually per motor... I contacted these 2 companies but they did not have experience with this before... and they are a bit scared of making statements....

[jrbe]

The issues of power split front to rear pop up mostly when traction is near the limit.

The front motor (induction) can run mostly free, no acceleration, no regen so could be used only above say 15% throttle.
Rear will be controlled between acceleration and regen.
Can swap positions.
Lots of vehicles split power front to rear. Good ones have torque vectoring and can shift a lot to one axle or one wheel and on a wheel by wheel basis. Also gets into traction control. There are no diy controllers for this I'm aware of.
You may be able to get creative with can bus control with a dead zone for the front motor to effectively be just coasting. Lower than this the front motor would go into regen, above this the front motor would help acceleration. The main point around this is it being smooth and transitioning well. If the window size correctly and the transitions in and out of it are smooth it should be able to be controlled properly.