GT2052S is good for 180 BHP with 24-25 psi of boost on the 2.0 HDI 8V.
Any more than that and you'll have back pressure problems and the lifters will start collapsing or you'll snap a rocker.
I ran a GT2052V (VNT) on my 1.6 HDI at 26-27 PSI and that gave me 210 BHP, but these are 16V and can rev unlike the 2.0 8V.
My advice would be to stick at 180 BHP (tested on a real dyno with realistic figures) and save yourself the trouble. I've set up a few with these turbos already.
Edit: But to the original question don't worry about head lift, this seems to affect the VW boys but never seen it on the HDI yet.
Any more than that and you'll have back pressure problems and the lifters will start collapsing or you'll snap a rocker.
I ran a GT2052V (VNT) on my 1.6 HDI at 26-27 PSI and that gave me 210 BHP, but these are 16V and can rev unlike the 2.0 8V.
My advice would be to stick at 180 BHP (tested on a real dyno with realistic figures) and save yourself the trouble. I've set up a few with these turbos already.
Edit: But to the original question don't worry about head lift, this seems to affect the VW boys but never seen it on the HDI yet.