the giganotosaurus size

NOTE:the following things just speculations.

I started to guess how big was the giganotosaurus,and i calculate these results.
At first i compared the skull size with the body size and compared with the other predators.
the biggest T.rex skull is 1.5m long and the full body is 13m long.so the skull is 11,5% of the full lenght
the acrocantosaurus skull is 1.3m long and the full body is about 12m.now the skull lenght is 10.8% of the full lenght.
but when i do this with te giga the skull is 15.4%of the full lenght.after that i think its too much for an adult.

and after that i think a giganoto with a 2m long skull easily reach the 16m lenght

forget the upper size,here is a new full size:http://jplegacy.org/board/showthread.php?t=23983&page=5