Turbo Vado 2 4.0 or 5.0 or 6.0?

[Jeremy McCreary]

the Pm data has been adjusted with the efficiency curve above to be Pm mechanical.

Spec's SL 2 documentation says that the mechanical Pm and power ratio readings on the TCU and app are just estimates obtained by multiplying measured electrical Pm by a constant assumed efficiency of 80%. Don't recall that they show raw electrical Pm data anywhere.

Just confirming that you backed out the assumed 80% before applying your empirical efficiency vs. cadence curve. If not, the gap between your empirical Pm/Pr ramp slope data and the corresponding Spec MicroTune data is even wider than seen in @mschwett's last plot.

Another reverse-engineering hurdle: The new empirical 40/40 and 40/100 Pm vs. Pr plots once again show that ramp slope S = Pm / Pr varies strongly with both E and M in assist mode E/M.

This is certainly unexpected from Spec's 2024 documentation. The clear message then was that S depends only on E. Nary a hint that S might also vary with M.

So we'll have to map out this mysterious S(E,M) function empirically. Is it the same for all E/M modes, MicroTune and otherwise?

Unfortunately, much more field work ahead.