Here are some tips on the various tracks:

            Oval:   The secret with this track is to use as much afterburner
                    as possible, but without blowing up your engines.
            
            Antacorp: A difficult track - use high centering and right shift
            
            Clortek: Go over trenches, don't slow down at pressure gate
            
            Otyaka: Dark underground - use centering level five
            
            Banzal: The hardest track - crank centering up as much as possible
            
            Apocalypt: Tight hairpin three corners from start, loop de loop underground
            
            Estoria: Back into sunny climes, fairly wide track, low centering