Well as an update, I am now able to control the boost. I believe I have the ~11psi spring in and when only running spring pressure, it was cutting off at 15-16psi. So I hooked my Hallman MBC back up and got the boost dialed in to 19psi, or so I thought. I did a pull yesterday and it hit 20-21 psi. So I turned the boost down a little bit and got it back to 19. Then today, when I did a pull, I was hit 17-18psi. So I turned it back up to 19. Now I just got back from a small cruise and I was hitting a little over 20. What could this be from? If I switched to a 3-port from Grimmspeed, would that help?