Posted this on the FB group, but wasnt sure if everyone here used FB, so I thought I'll post my issue on the forum.
Had this noise since I bought the car (185,000kms) and became more audible when I installed a new dump pipe, I noticed its louder between 2k to 4k rpm
Matt remote tuned the car to suit the DP but said there's a possible boost/vacuum leak going by the Learning View data.
https://www.youtube.com/watch?v=7Hu2oDbAIqg
Things I have done last few days and cant find a boost leak:
-Installed AVO silicone Turbo/Maf/TB hoses
-Rechecked and zip tied vacuum hoses front and back of the intake manifold.
-Installed an aftermarket BOV - plumb back
-Re tightened all 10mm bolts on the intake manifold
Things that might need checking:
-Replace TMIC
-Check Headers/Up-pipe for leaks
Is there anything else you guys can recommend me to look at - I really hope its not my turbo dying. (here is a pic of the turbo with the flash on before the inlet install - minimal horizontal & vertical shaft play)
https://imgur.com/a/DU4t7UQ
Thanks