SWC has no in-game feature coded for "pod racing". It is possible that someone set up a system where you could race in a vehicle, but as to how you would participate, that depends on the rules of the specific competition you are looking at.
I've actually been in a race before, usually its set up by one player with rules pertaining to what speeders are allowed, when it takes place, ect. As far as something being coded into finale i.e a race takes place at such and such time and place with npcs/players racing doesn't exist. Which is a good thing because it promotes player interaction and a reason to actually visit a planet.