i listened very close to your video

- and found it really sounded much sharper then my bov.

(but as i filmed my exhaust and it sounded much higher then in real life i know you cant judge by video)

the hissing sound by driving inbetween boost and vacuum is the same on mine.Check out youtube videos to see it verified on piston valves.

And somehow as it seems to open later but its very hard to tell

- thats why i asked about the spring.Youre doing it right by not adjusting it.Before adjusting it you could remove line A to improve reaction time as advised by synapse.If necessary at all.

i have the version with port A and B only.

when you boost

- you clearly hear a constant pitched wooshed sound.I have the same sound.I first thought its the bov.But its coming out of the air filter.On a gen3 i never experienced that loud sound

(i drove as pessenger in various).

your car idles at low rpm?how low?900-950 on mine.very clean idle.

beside that.

did you read out your error codes?most gen4 swappers get error 78 which is not listet in our caldina error code list.I would be interessted if you get the same error.
