sr20detnz

i have come across similar sort of promblem but i was running 11.9 and 11 psi boost. At 11.9psi there was huge power dip and at 11psi it was less but it was noticeable. When i ran my stanadard actuator at 7psi i good power curve with correct air fuel ratios. i have dyno all the above pressures and yet havent found a suitable pressure above 7 psi. I am trying to find out what is cause of this power dip? Is it that the air flow meter can no read the flow of air or the ecu can not read the air flow signal given by the air flow meter? Or it is at a specific pressure the ecu goes on to limp mode? Are there any other factors that decide it ? Can Safc work?

-------------------------------------------------------------------------------- I installed 3 inch exhaust from the dump pipe ( 2 resonators only, no cat ) and K&N pannel filter. With the RB20DET actuatoer i was hopeing to lock boost at 10psi but the boost goes up to 11.2psi and i have huge power loss. But with RB25DET actuatoer it holds 7psi through out the power curve and give good power

I also installed 3 inch exhaust from the dump pipe ( 2 resonators only, no cat ) and K&N pannel filter. With the RB20DET actuatoer i was hopeing to lock boost at 10psi but the boost goes up to 11.2psi and i have huge power loss. But with RB25DET actuatoer it holds 7psi through out the power curve and give good power. Explain the power dip, as u mention some thing about the computer?

I installed a RB20DET actuator RB25DET on R33, i only got 108rwkw. When the standard RB25DET actuator back on i got 140rwkw. The rest of the car is factory standard.