I've recently bought a gt tdi (150) and am very impressed with it but i do want to do some engine mods not staight away though.

a mate of mine who's had a few tdi's suggested fitting a bleed valve to the turbo or adjusting the air and fuel mixture before i go doing more major and more expensive stuff like chipping the ecu. I just wanted some advice if poss before i go jumping in at the deep end

cheers everyone