Best of luck to you in the competition. Be aware there are often unexpected conditions that surprise competitors when an event begins. These are often surprises for the contest planners as well. Leaving room to allow for such disasters can give you an advantage over other competitors.
Not to brag but as I mentioned long ago the most comfortable speed reading I used to do was at 6 to 700 WPM, not far from the 800 number stated recently.
Reading through this thread after so long I am reminded why I do not speed read anymore. When I take time to read I am not in any hurry. In fact when I finish the book I wish there was more of it. Back in school the goal was to get finished with a book and onto the next but now it is reversed. Finding a book to enjoy is not always easy.
If there is still any interest I would be willing to write up the old Rapid Reading drill we used to do in the EW class. It will not take quite as much space as the last method, as long as I don’t post it too many times.