I have a set of the 38mm gates with the small green springs installed and a turbo smart manual boost controller turned all the way down. The gates are both in ideal positions, right in the bends of the crossovers. Turbo is a FI stock S480 on a 408sbf with Afr225s. I'm wanting 8-10lbs on the street and 14lbs is the lowest it will make. I have read where this same combo will hold 8lbs easy on some combos. I even unhooked the boost controller just to see if it was the problem and drove the car and it jumped to 19lbs and was just crazy. What can I try or do I just need 44mm gates if I want lower boost? Boost gauge is referenced in back of intake. It's also going through a big Garrett intercooler.