i have a remap ecu by toshi and he does a great job and would be well worth the dollars.it does elimanate rich and retard and can have ur rev limiter and top speed changed,i would advise u to get a walbro or bosch fuel pump and have it rewired to receive direct current from ur alternator so u receive a constant voltage.also make sure ur boost controller is strong and doesnt spike for best results.toshi is a very helpful guy and will help answer any questions and sort any isssues.if u have the cash id go a nistune