For the most part im still a noob so everything i know about cars i learned on my own. So i dont know anything about ECU upgrades, fuel curves, ect. Im currently running a 2000 GSR with an Comptech icebox, DC headers, and cat-back exhaust. At what point do i pick up a new ECU or upgrade and what kind? Keep in mind im on a tight budget and i know VERY little about it.