Stillen Supercharger boost

NoAiMiSe1

Good day Forums,
-
I've been reading this forum to upgrade my SC and solve almost all my problems, so thank you guys for that.

Today i am facing a problem that is unusual and would like the support from you guys.

What i have is a base 370 with a Stillen SC kit, since i installed the kit i got a boost of max 7 psi, then i made all the following upgrade:

- NISMO exhaust system
- FI test pipe
- SC upgrade with Vortech
- 9 lbs pulley upgrade from Stillen (got 1 size smaller belt)
- QRJ 38 mm blow-off valve
- GTR spark plugs
- 1000 CC injectors

yet with all those changes, i am still getting only 7 psi max!! at this point this is killing me and doesn't make any sense . I also tried taking out the blow-off valve and make a run by blocking the hose, got the same boost!

i really would like your feedback on this and hope i can fix this problem.