Fast is slow in the hobby. Brake into the corners, accelarate out of them. Change to 2.2 rims and get some bowtiews if its dusty or some holeshots if its hard packed wet clay. Get some good proline ribbled up front. change your shock( losi shocks are GREAT)put some 30wt oil in them. Your can always benifit from a good servo. I know its a lot but that will get you headed in the right direction. Like Chris said it will always be a rustler, if your racing your better off with a T4 or xxxt-cr.