My concern about the driveshaft failure is my own opinion.I have had friends of mine driveshafts break and it's not pretty.Some on the Dyno,some on the street.
I never once said to go 2 or 3 times the legal speed limit.Here's my point.As time goes on and people race these cars at the drag strip or road course this becomes a saftey issue bottom line.
But clearly from this ^ post you affirm that you are talking about about driving at racing speed, legally or not.
And if you (general third person you, not you
) are going to drive your car at excessive speed and beyond its design limits, then safety is YOUR responsibility.
I am not going to attempt to compare the physics of a rotating dyno drum to a stationery road, and please dont try to argue that the planet is spinning under your wheels in the same manner as a dyno.