Hi,
l had some problems about slow spooling on my BNR S1. Its second hand and it ran 20 psi. Around 2000 KM old.
l had 10 psi at 4200 RPM and peak 14 psi. Now i have 10 psi at 3700 RPM and peak boost 17 psi. Its getting better but not optimal... I did a smoke test and boost leak test. tightened the actuator rod but still slow spooling. Is the turbo gone bad?
