The speedway wouldn't be my first choice of rides to rope drop, it can often be caught later in the day with a relatively short line. I wouldn't do breakfast in the park at 9:15, that is right in the middle of the best time to be hitting rides with short lines. I typically set my first FP+ for 9:30 to 10:30, or even 10:00 to 11:00, allowing me to use that first hour or hour and a half to take advantage of short lines in the morning, then use my FP+ once the crowds start to build up. Breakfast for us is always either at our hotel before we leave for the park, or at a restaurant before the park opens.
However, to answer your first question, yes, if you go to the speedway at rope drop, and get there quickly, you should be able to ride, and get to BOG. You will likely be a few minutes late, but they will still let you in, you just may have to wait a bit longer.