I assume your going to be using bike tires so its best to pick the ones with the lowest rolling resistance. Tires with a harder rubber compound will have less rolling resistance. I doubt that cornering and braking will be an issue so get a set of time trial tires with a very hard compound .
There are a few other things that effect rolling resistance too. see this link
Bike Tire Reviews- 4 Things To Know About Rolling Resistance | Cycling-Review.com
Other than that tune the engine lean, route the air intake under the seat and eat at taco bell before the race.