Add weight, most of it on the inside. Keep your COG low as possible. Keep your chassis as low to the track as the rules allow.
Gearing is very important. Small track 60 feet or less --- tall crown or spur gear -- small pinion 6 or 7 tooth.
Tiers are just important here as they are in Nascar.
We run on a 58ft banked oval, some guys are using foam tires coated with silicone, some are using fish rubber foam. Right now I prefer the fish rubber.
Make sure your rear tire track is as wide as your rules allow.
Keep you tires clean.
Care for your motor use voo doo drops on the com and also on your braids