Don't even need A1A trucks. The Spainsh have been running 4200 HP, low weight diesels for 20 years now. only reason they won't be replaced is there's no market for lightweight high speed diesels in Europe, since those lines get electrified, or kicked to DMU operation.
If the US were serious about HSR, or at least improving the dismal performance of existing Amtrak trains, you'd see investment in light weight diesels, and light weight cars, and then probbably electric. Even the DOT's own objective for JetTrain was to 'match' the AEM-7, which is an early 70's standard for performance that's long been surpassed...
Anyway, with the FLHSR project dead, and no real sales prospect up north, plus a unit that's unmarketable anywhere else (way too heavy, way too expensive, based on a carbody design that for technical purposes, a failure, plus the technology being sold has traditionally not worked very well), I wonder why BBD even bothers, other than someone's kicking them money for this white elephant. With a glut of railcar manufacturing capacity, and a business that's on shakey ground, they sure aren't bothing with it on their dime.
Which brings up testing it. Amtrak's already (much to the DOT/FRA's annoyance, no doubt) backed away from their existing turbo operations, and they have no money to be a free guenia pig. I'm guessing what's standing between the scrapper's torch (a/k/a 'storage') and testing on Via will be the issue of who pays, too. And BBD isn't going to show it off unless there's an order ready(Go, test drive a Porsche with no intention of buying it. Dealers hate that).
Run on the NEC? Great - where do we change power for the NY and Baltamore run throughs? North of NY - at New Rochelle? Can't. Harold? With LIRR trains blowing by every few minutes, all the time. Dangerous! South of NY - Newark? Sure, and and annoy NJ even more?
As for a backup turbine? Come on, the problem isn't the catenary, it's that the catenary hasn't been properly maintained for 40+ years. The new stuff's been very reliable, I'm guessing MN will be there once they finish theirs off and reconfigure SHELL (which is an inherently messed up design). If Amtrak ever grows up (And let's be honest here - the NEC's catenary has been getting old for 30 years now, long before we had boxcars and express and million dollar advertising and flawed 'network growth' plans. It was poor long term planning that's led to the existing mess) and realizes they need new wires on the NEC, not corporate rebranding after corporate rebranding, and useless freight equipment, they too might fix their wires and it'll become decent.
At least BBD's got one heck of a tax writeoff when this thing gets chopped up. What was it, 20 million or so of their money and a free 20 million from the FRA for it?