The Tyrannosaurus Rex and Phorusracid link

They were probably related in some way and the phorusracids were most definitely the closest relatives of the dinosaurus that were alive at that time.

good to see an old face come back

as for the Tyrannosaur Phorusrcid link, it's possible. I Believe Terror birds came from south america though, right? and as of today, there hasn't been any tyrannosaur discovered in the southern hemisphere(correct me if i'm wrong). they were some of the dominant predators of south america, only spreading to north america through the land bridge that is  central america. Terror bird origins link

I somehow failed to notice that it said Tyrannosaurids and not Dinosaurs in general. Titanis could have descended from the Tyrannosaurs of North America, but it seems like the Dromaesaurs were more similar to it. And in South America it's basically the same, it could be either one of the large Carcharodontosaurids or the Dromaeosaurs (i can't remember one right now, but i'm sure that i'm either forgetting about one or we have yet to find a Dromaeosaur that lived there at the end of the Late Cretaceous).

Welcome back. 

I think the only link was the role each played in their respective ecosystems. Both were apex predators tha focused on the head rather than arms.

PS- Tyrannosaur did not evolve(whether animals evolved at all or not is a whole other discussion) into these birds. If anything, it was the dromaeosaurs or troodonts that did. The evolved into birds and then birds changed and adapted to fill different roles. One family of dinosaurs doesn't evolve into one family of birds and another family of dinosaurs does not evolve into another family of birds.

Welcome! But although it possible its related large theropods (even tyrannosaurs) its more likely related to members or relatives of dromaeosaur....