Postby lighthammer » March 3rd, 2012, 2:41 am
it's a smaller turbo on the 2.5 and it's a fixed-vane turbo, not a variable-geometry vane turbo like the 1kd-ftv. ALso I believe the manifolds are differently shaped too, might not match up.
Also, it's not just the turbo that determines the power of the 1kd-ftv, it's also the ecu and the size of the injectors/timing, etc.