Shorter Tracks?
 

Back when the engineers, etc. were saying,"it's impossible to run under 7 seconds in the 1/4" and they asked Don Garlits... he said ( the best I remember) the only unbreakable rule is "You can't get there before you leave".
My point is technology will keep improving until some day you can run 400mph in the 1/8. Of course the rules will be very different by then. So, is there an answer? How the Hell Would I know?

OF course "BIG" was right. At least until the SST came out. Then you could land in New York, before you departed Paris.

this sucks....people spent all these years trying to go faster now they want to slow it down....reeeeediculous...nuff said