Shy,
this is an interesting perspective... on low-grip tracks, more weight generates more grip - but is the incremental grip overproportional vs. the incremental weight, or is the better handling mostly coming from the car's reactions being slowed down and then becoming easier to drive overall? My understanding of tire adhesion is that more weight means more grip, but not enough to compensate for the extra inertia... hope I don't confuse you more with this
I really like the sprung vs. unsprung mass perspective too... I didn't think about that one initially... good stuff...
Anyone without any commercial interest wanting to add to the "technical" part of the discussion?
Paul