I put the 11.60 psi spring combo in and now the car pegs at 15psi, which is great news. Only downside is that it still cracks open around 5-10psi. I don't really notice a difference in spool but I'm sure it's affecting it a little.
I'm still worried about when I climb a hill and I only want to hold the psi around 5. Basically just enough to keep a constant speed climbing the hill. But the wastegate will want to open, dumping some of that air I need to maintain psi. Any ideas?