Bit of a mare with the Poobaru.
So I found that the intake hose was split.
I originally bought a reasonably cheap silicone inlet pipe for it, and after massivery effort I came to the very sub optimal situation of slightly ripping the hose at the turbo inlet. This annoyed me.
I globbed some silicone around the rip and no put it all together.
This annoyed me and I knew I needed a new one.
So I took the inlet manifold off, fitted some 8mm heat resistant spacers and replaced every single hose and clamp possible, all of the vacuum lines and basically anything I could get my hands on.
Reassembled with the slightly ripped turbo intake pipe, all my will be taking it apart next week to fit a new, more expensive turbo intake pipe which should fit much better and not require silicone ripping force to get around the inlet and onto the turbo.
It sounds lovely and healthy now
Unfortunately none of the silicone inlets will work with the stock MAF and airbox arrangement so I've had to fit a very nasty cone filter. However I plan to purchase a 45* silicone joiner and mount a Honda S2000 air filter in the place of the standard airbox with a cold air feed from both the wing vent as well as a small trumpet mounted in the lower fog light cover with ducting through the wing to the filter. As the standard airbox assembly has a snorkel from the slam panel into a resonator in the wing and then through to the airbox. Giving me two nice big holes in the wing for ducting as well as a snorkel which I can cut to shape to feed the filter.