Lets all remember the 'x factor'...an 8500 rev limiter. So the past few years have seen what I think is a mechanical cap on speed. These teams have to have the perfect track for the whole 1000' to hold the power and even at that, the first 100-250' most of the power is taken away from these monsters so they don't blow the hoops off.
Btw, I look for those wet pipes near the finish line (rev limiter) and I haven't seen it that often in recent years. Crew chiefs have learned to work within that window. Just incredible.
That window is so small to run these big speeds, so huge kudos to the teams that can make it happen