How strong is the bite force of the tyrannosaurus rex?

According to paleobiologist Dr Gregory Erickson (from Florida State University), the Tyrannosaurus Rex had a bite force of 18000 pounds or more! This is equal to 8164.66 kg. Dr Erickson states that this bite force is more than enough to bite through a car door. Also, the Word "tyrannosaur" refers to a group of predatory dinosaurs that lived from the late Jurassic period to the latest cretaceous period, at which time they reached their greatest dominance. Tyrannosaurus Rex, or (T.Rex), is just the best known member of this group.