So uh, I just remembered about jlun2 post like 2 years ago about an ini file you can edit for bfbb that has quite a bit of useful information (unfortunately I haven't found a whole lot of useful information but I also haven't spent much time with it) I made a video showing off some things that the ini file can do such as change max speed, bubble helmet height etc.
This also leads me to believe that there is (probably?) a single speed value that we might be able to find, I personally have had no luck for whatever reason but I thought I should post a video of some things this ini file can do.
https://www.youtube.com/watch?v=ZZcLu_TzIFQ&feature=youtu.be
Another thing weird is that this editable file has lots of values that you could look for in cheat engine, for example. Spongebobs max speed is 5 normally, like I said, I tried looking for that in cheat engine but no luck >_>
oh did I also mention this game has scooby doo or some shit in it?
http://gyazo.com/9b251585eab21aa1b4d5d23c8005475f