this is getting ideas into my head lol. Whats a begi fmu? There are few different garretts turbo's around. kevhaywire who has experienced a few turbo's had said on another thread that the GT3071R full boosts under 3000 rpm which is to fast imo. The GT3582 which kevhaywire runs now full boosts at 35000rpm which is more like what i want. Jim Potter,.is your turbo the same as in that link? if so in what rev range do you full boost?