Was examining the engine a little closer to normal and noticed that my GT TDI 110 intercooler to inlet manifold pipe is quite restrictive and was wondering if there was a samco/silicone hose alternative to increase air flow as I am unable to find one.
There are no sensors in my pipe that when I took the lot apart! 
The restriction from the original plastic pipe was quite a lot [:O] as it narrowed from 60mm to about 20mm and then to 50mm. It now has a trimmed 1.8T intercooler pipe (S shape and cost ?2 from a scrapy) that joins onto a peiece of stainless steel 54mm bore pipe that has a 45 degree bend (free as its been in garage for ever), which then joins to the original rubber inlet body hose to finish it all off.
This and the cleaning of the inlet body on the manifold made a noticable improvement. She smoked for about 5 miles when driven after mods as I think the ECU was used to supplying more diesel prior to the restrictions being taken until it adjusted itself............now she hardly smokes, even if pushed hard and the extra torque and top end increase is great. Going to clean the inlet body every 3 or so months to keep on top of it.
Cheers guys...........pics a little poor as I was using my mobile phone camera.
There were no companies offering hoses for the TDI in this area and after I had done a similar thing using Samco on my previous S3 (SEM's now) I loved the improvement and really wanted to squeeze as much power out of the engine 
I really recommend this and also the cleaning of the inlet body while half of the system is dismantled as I had about 5/6mm of gunk all the way round mine [:O] once I detached it from the manifold. (took a couple of hours of cleaning though 
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