Well..... I was forced to make a I dont know where the hell I'm at pass. So I said what the hell and lowered my boost all the way. I was running a single delta gate that day. So I ran basically spring pressure only (no counter air pressure to the diaphragm). I launched at idle, pulled a 1.98 60', ran out maybe 100', then hit the nos. The boost then went to about 20 it might have been 22 and I started trucking pretty good. Now I run stock heads and cam so the 116 mph is pretty good for 20 psi. If I ran a lock up convertor I would have been 118 to 120. Like I said though it wasnt a good test at all for measuring the potential of it.
I can say that it appears to work pretty damn good. Especially when you consider I bought the kit used from a buddy for $160!! It really kicks the turbo right in the ass and makes it spool. It seamed like 1/2 to 1 second delay after hitting it them boom! Hmmm... wrong choice of words

its more liike woooosh! Up comes the boost and the ride starts.
If you post an new topic like "nos input and results" I'm sure you'll get some real good input from the guys who can answere your questions much better. ( I dont mind giving my input at all, its just that I don't have much input to give YET!)
As far as the boost jump goes, it seams to me that when I researched before I got mine, it looked like around 7psi was the norm. I also imagine that will greatly very with amount sprayed and type of waste gate set up your running.
HTH: Jason
ps: Man I want to put:
1. race gas
2. propane
3. nos
4. compressed air (not from turbo)
5. alcohol
all in my motor at the same time! but hey I'm f'n crazy

. I'll have to change my name on this board to "Sir Mix Alot".