Finally got my boost to hold! :D

[mxmang]

i finally figured out what was wrong with my car, i tried piecing two pieces of hose to my map with the factory yellow restrictor, so it ran like crap, also i finally put the restrictor in my ball spring valve...now it seems to be holding boost instead of spiking all over the place....my question is, why do you need the restrictor in the line...what exactly is it doing? does it just increase the responsibeness of the turbo spooling?