nitrous help

can anyone help me with timing on my 89 mustang ,modified trickflow everything. I am going to shoot a 150hp shot and my local dealer said to run it at about 6 not the standard 12 but the 6 had no power and it seemed like the bottle didn't hit ,went back to motor and 12 degrees and she hit off the line to a 12.82 just on motor help please

I replied in your other thread.