It is generally believed that the warp scale was adjusted because as ships got faster, it was unwieldy to refer to speeds as warp 9.xx. The Enterprise-D and Pasteur traveled at warp 13 in the incident concerning the temporal anomaly in the Devron system. (TNG: "All Good Things...") http://en.memory-alpha.org/wiki/Warp_factor http://youtu.be/299d23UY3Ig
That and .02 in a linear scale in this game is nothing. Warp 13 for the MACO engine! It is a canon number and it wouldn't even be the fastest engine.