hmm drag racing? No idea what gearing for your car, though if u gear higher it could go faster, to a certain extent though, where if heat comes into play it could actually be slower. Also, u could try gearing lower, the extra acceleration could help.
Tires wise that will depend on the time of day & track conditions. E.g. using sorex 36 @ 10pm it definitely won't have much traction (at least with a 9t mod motor imho) and get tons of wheelspin. sorex 28 @ 1pm noon won't help either, the tires wears damningly fast and won't have much traction either way.
If it's a track ask around what tires the other ppl are using. Else choose something close to the temperature you're running at.