Well a friend did tampered with the fuel pump on this new 2010 2.0d and well it did increase the speed of the car but caused 2 additional issues.
smoke / fuel consumption was higher - before if it was like 12 - 15km per ltr now it was like 8- 10km per ltr.
then also by doing this i was told be a mechanic at toyota as well u scew the pump and engine as well , as it has to burn more fuel / gets more hot and hence u shorten the life of the engine.
as for the turbos , will not recommend them as expensive , ppl here the mechanics really dont have a big idea on how they work and the extra parts they require to be fited on the 2d engine.
a word of warning guys . D4D engines are efi - dont scew with them - as u wont find any mechanic here who can fix it for you.