How to verify that the system is opening properly

[gbmwpower]

I have a 2002 BMW M5 that I have installed a used HFS-4. I followed all of the test procedures stated in the instructions and everything worked properly. I drove the vehicle for about 2 months and everything was working properly. I just had the vehicle tuned for running meth and I am not sure if I am paranoid of if the system is not operating properly. I am pushing 11 psi and the vehicle accelerates so fast I have a hard time watching the guage. Sometimes when I accelerate hard it the red B flickers then both amber leds light but I don't see anything on the flow leds. It seems like the leds don't light up until close to 4.5k - 5K rpm. I thought it was supposed to kick in closer to 3,500 rpm. How to I road test the system with out risking damage to the engine?