[Mike Carr]

What combination do you run? Most cars are eligible to run three different classes (it's natural class, up one, and down one). Once you tech in in a particular class, you can not change it. Might want to head to the scales before teching, to see what the car weight is (with driver), to see what adjusments might be needed. Some cars will do "better" in a different class, based on weight and Index.