Not having any information about what type of track, or what the rules are, or what type of racing it is, makes it hard for anybody to give suggestions. One thing is to get rid of as much weight as possible. Glass is the first thing to go. Strip everything out from front to back. Brace the strut towers, see Vibe GT strut brace. Move the top of the struts in as far as possible; meaning drill new mounting holes in strut towers for the three upper strut mount holes if rules allow. Watch what wheels you put on the front as you can break the centers out of the wheel rims from the loads on the wheels. If circle track, stagger your tire diameters so you have larger tires on outside of car. How much larger depends on the corner radius. Measure tire circumference by wrapping a tape measure around the outside of the tire. If running at Elko or Cedar Lake race tracks then anywhere from 1.5" to 2.5" difference from inside to outside tires. Tires, you want as soft a rubber tire as you can get. Dirt track, you want deep tread on tires. Paved track, you want very little tread on tires or you will get chucking ( this is when the tread folds over from the cornering forces and rips the tread off the face of the tire in chucks ). Front wheel drive, you want to be accelerating through the corner but that does not mean holding it wide open. If dirt track, your radiator will get plugged with dirt so take care of that.
There are so many things that are different about what to do that depends on the track and the type of racing it is. The Vibe has a very flexible chassis/body, which is not good for handling. A full roll cage that connects all four corners of the suspension would help make chassis changes more predictable but a lot of these types of racing do not allow going through the firewall with "safety bars". If allowed to do some laps before the race, try it with the sway bar disconnected and connected to see if any handling changes.
Close tracks to you by your location are Elko Speedway (paved, which I think is canceled for now), Cedar Lake (dirt track) in Wisconsin, and Brainard (road course); or you have LaCrosse WI and Cedar Rapids Iowa. All different tracks so it is hard to think of what you may need. Anyways, good luck and the important thing is to have fun and learn as you go.