Hey all, long time no post.
I've had a ViPEC in my S2 R33 for some time now, and its always been making this whirring noise since it was put in, was told that it was normal etc etc. Couple weeks back a friend of mine told me to get it checked out so I did, took it down to hyperdrive and they said it was to do with the ViPEC boost controller which was making that noise (initially thought it was the clutch and then the turbo) and a whole host of other problems which will eventually get sorted.
Back on topic, I had a 33 GTR boost solenoid put in when the ECU went in, so I was wondering if anyone else had a 33 with ViPEC experience anything similar to this, and if they were able to fix it, cuz if hyperdrive can't fix it i'd have to get a different aftermarket boost controller or a bleed valve.