Fuel pump upgrade

[Midnightclub]

it wouldn't really do anything tbh.. the map is what tells the engine where to put the fuel in and how much.. you could dump in as much fuel as you want but the turbo will only be able to pump as much air as it's design allows.. personally, don't bother with uprating the pump unless your planning on uprating the turbo too, but then if you're going to be doing that, you might as well uprate the injectors to make the most of it.. it starts getting expensive.. the turbo is probably the single most restrictive thing on a standard HDi though tbh