Hi guy's,
my turbo failed a few weeks back so decided on a hybrid turbo, had that fitted at the garage. When I got it back the boost seems to back off at around 4000rpm.
So today I fitted a 7psi turbosmart actuator and now I'm getting a weird noise at around 3500rpm.
Does anyone have any idea what it could be?

It's a modified st250, stage 2 pumaspeed

Can't upload the video for some reason
https://youtu.be/ke1svKkZ7fU