Right I'll answer the last few together
Penguin, you mention the "whistle of the turbo spooling". I've had several cars with turbos and none of them whistled, I don't think you should be able to hear the turbo from inside the car if it's working correctly, unless you've done a mod to make it audible.
I certainly can't hear it on mine.
The standard turbo whistle cannot be heard from inside the car unless the windows are down. It's the exact same in this respect as the day I got it so no change/worries here.
Does it also make it if:
Your in neutral. You rev the car to ~3K then take your foot off the pedal?
Nope it only occurs under driving load.
Any chance of recording the noise on your phone and uploading it so we can hear it? Would be easier to diganose that way.
I'll assume you don't have any uprated engine mounts or any other mods (dump valve etc)?
Tried this already but it's too quiet a noise for my phone to pic up.
Whether I floor it or accelerate gently the noise occurs just before the turbo begins to spool.
