Originally posted by Rob 930
The boost control solenoid is a VW turbo part and it's controlled by my DTA ECU.
The N-75 has a few variants that define the responsiveness of the solenoid to the voltage signal. N-75C, N-75F, N-75H and so on. Slow response variants cause higher boost spikes at partial throttle. Faster response will be lower and smoother at PT.