Finally got some numbers together for 20psi boost at what RPM. In datalog #2, full throttle wasn't achieved until 2350 rpms. In datalog #3, full throttle was achieved at 1900 rpms. Both times, even with different throttle application, 20psi is reached in the 2600rpm range. Not bad!
I'd be curious to see some other numbers for this as I believe my FiST is the only one running the pumaspeed quickspool manifold this side of the pond. I'd like to know if it was worth bothering with it. I guess I could put the stock manifold back on and compare but that is a lot of work.
Datalog pics!