I think I found a solution for bigger turbo 
. And it's still in HDI 
. I found some info, that stock GT1549S is somewhat similar to GT1749V, which could give around ~180HP. Of course GT1549S is wastegated, while GT1749V is VNT. There's some 1.9 TDI in Poland with this GT1549S, and after upgrading fuel system, they have around 170HP and 380NM.
Check turbocharger from Peugeot 807 (or other eurovan/car with RHW onboard). It's GT1549S and after boring two holes in manifold (or turbo) it should fit perfectly in 306 (or whatever RHY/RHS/RHZ car).
There's dyno of AHU:
https://zapodaj.net/97b6dcfaedb9c.png.html
Also, conrods. RHY vs RHZ/RHS/(RHW?) vs RHR. Does RHR has strongest conrods of them all?
. And it's still in HDI . I found some info, that stock GT1549S is somewhat similar to GT1749V, which could give around ~180HP. Of course GT1549S is wastegated, while GT1749V is VNT. There's some 1.9 TDI in Poland with this GT1549S, and after upgrading fuel system, they have around 170HP and 380NM.Check turbocharger from Peugeot 807 (or other eurovan/car with RHW onboard). It's GT1549S and after boring two holes in manifold (or turbo) it should fit perfectly in 306 (or whatever RHY/RHS/RHZ car).
There's dyno of AHU:
https://zapodaj.net/97b6dcfaedb9c.png.html
Also, conrods. RHY vs RHZ/RHS/(RHW?) vs RHR. Does RHR has strongest conrods of them all?
