Boost dropping off

[Mistaspakles]

I took my car to the dyno yesterday to tune my car on the DSMlink. Well, when everything was set up I threw in some C16 and turned the boost up. I had my Profec Spec II set at 75% and 15% gain. When it made full boost, it peaked at 24.0psi and started to drop all the way down to 21.5~22.0psi before the run was even over. I messed around with the boost a little but it kept doing the same thing. Any ideas? I have a Green and a Tial 40mm mounted on the O2 that is dumping to the atm. I turned my Type-S a quarter harder but that didn't work. Anyone?

 

[nine5raptor]

best way to see if it is the bov, is block it off completely on the outlet.
go out and boost up, but when you let up on the gas, don't close the tb all the way, bring it back down slowly. if you hold full boost, you will know that it is the bov that was leaking. If it does the same thing, then it is something else.

also, don't forget to plug the hole on the intake while you are doing this.