Right now I have 2 deltagates mounted to my crossover to control boost. I tried one but I couldn't go below 16psi at all and that was at part throttle. I want to switch to one single gate mounted on the downpipe(I'll have my DP converted or a new one made). I was wondering, consider I have a 4.1, what size wastegate I should look for in order to have a good amount of control over the boost?