For an enzo you probably want to have the top speed in the upper right corner at approx. 280 mph because it runs the 260s. To achive this i suggest first: place final at its highest setting, lower top speed in the lower right to its lowest, then lower the final until desired top speed is reached in upper right corner. Then play with the gears to get a smooth first gear launch. Hope i helped, and if you wish add me : kttheman001 and i can tune with you if you like.