38mm tial gate with 20psi spring set up, 54 mm turbo.

What else do you need to know?

I can tell you that if I unhook the controller it will make lots and lots of boost. With the controller hooked up thirty psi is all it will do and is more comfortable at like three psi less. I'm trying to get it in the forty range. When we had a 10psi spring in it the max boost was the same as when we had a 20psi spring. Like the controller has a map in it that maxes out?