I remember some discussion on this a while back when the BTX battery versions were being discovered. I searched some but am having a hard time finding it.But wouldn't that 350V system result in lower horsepower/acceleration compared to the original 400V?
What I remember was people generally saying they couldn't detect much difference. I think the acceleration is based on total power that the battery can supply, and this can supply plenty of current that seems to make up for that--maybe? And that higher voltage acceleration aspect was only detectable in the Performance models and even then only above 90% when the voltage in the pack got really high anyway. So for most of the old 75 and 85 cars that are getting these, it's not going to be very applicable.