Xiaomi 4 Pro Gen1 - poor performance, low torque

[pwoznet]

Hi Team,

Has anyone tried the max current tweaks for Xiaomi 4 Pro Gen1 ?

I've been playing around and it seems that the max ampere settings are somehow ignored - as if there had been some additional cap preventing high power output.

I'm comparing the acceleration and max speed to the alternative controller for Pro4 Gen1 from aliexpress (the green-pcb Xbot/miniRobot).

Test condition:

-11s battery fully charged (standard + 1s in series)
-Xbot controller with shunt resistor modded (changed to 3 mOhm from 5 mOhm)
-Original controller flashed (st-link) with DRV022-NGFW. Maxed out amps setting, DPC, overspeed disabled etc.

Results:

XBot:

• Max amp measured up to 28A (external clamp amp meter)
• Good acceleration
• Max speed 35km/h (~34 GPS)

Original (NGFW)

• Poor acceleration
• Max speed, barely 28-29 km/h - takes ages to reach it.
• Freewheeling max speed 33 km/h (31 at 10s battery)
• Sadly I didn't measure the actual amps as I switched back to the Xbot ESC, but feels like 15-17A at most.

Am I missing something ?

Thanks in advance for hints and/or discussion.

[k2dp2k]

I also tried to set the amperage higher… I don’t get more than 750w out of it, no matter which values i put in…