1) Was this the pack you discharged down to 60V?I just came back from a drive and have some real voltage readings for you.
I was able to record them on my phone:
582 541 561 410 430
440 470 460 440 440
The above numbers are from a full throttle reading.
Did you charge it up again before putting it back in the car and doing your full throttle event?
2) The DC-DC disables itself around 75/80V IIRC.
The MCM can disable the DC-DC whenever it feels like it if the Grn/Blk wire is intact.
3) ~120V is the minimum permitted pack voltage under assist loads > 20A or so IIRC.
It's also the voltage at which the MCM will give maximum assist current as it tries to maintain the full (amps x volts) 10kw output.
The MCM progressively throttles current below 120V which is why the voltage hack for maximum power does not allow the MCM to see < 120V, in fact it fixes it at 120V when > x assist is requested.
By progressively I mean as assist current ramps up the pack voltage falls, at just under 120V the MCM starts reducing assist power to try and stabilize current V voltage at the critical 120V point.
Depending on how bad/good/warm etc the pack is, some might put out 90A at 120V, but some might only manage 20A before the voltage starts sagging under 120V.
90 x 120 = 10.8kw
20 x 120 = 2.4kw
The car measuring systems aren't 100% accurate and MCM programming variations do give some subtle differences between cars/mcm etc. So some might allow 117V and some only a 124V minimum.
There is also a bit of time lag between sensing and action being taken so instantaneous dips below 120V can happen but it won't allow that to go on for any length of time.