Originally Posted by Elegancec
Hello, thank you for your answers!
I think in comparison to the price and performance, there is no way not to use a DC system. So I have a question to the kostov 11 Alpha motor.
You can read on the controller homepages from netgain or zilla 1000A or also 2000A. So this is the maximum amperage rating what the controller can deliver.
If I look at the chart from the motor, round about 680A ->280Nm. So I think this is what somanywelps also stated in his previous mail.
So at 1000A -> 312ft*lb = 422Nm. I think the BMW would fly with this
So my next step is to clearify how much torque the gearbox can handle.
Attached the interpolation.
Yes it would fly, I'm working on planning an E46 conversion.
The gearbox torque rating is a potential problem. Valerun has been running his E46 conversions with the stock, 300nm rated gearboxes at 484 nm out of a Warp 11HV at 1000A from a Soliton 1 without any issues except the clutch (he stated the stock ones slipped, not sure what he replaced it with).
BMW transmissions have a reputation for being strong, and even BMW runs them over "spec" (see E39 M5 with an S6S-420G transmission).
A cursory look at realoem shows the 2.5 and up Z3's as having a 320nm rated gearbox, and you'd be peaking at 427nm (K11A @1000A with Soliton 1), so you'll be fine (I think).
You may need to replace the clutch with something that can hold on against that much instant torque.