HELP NEEDED. M20B25 Turbo advice.

[Boyracer]

Hey guys. I'm new. The names Boyracer.
So I've got this 1988 Chrome bumper 325i that I have decided to
Turbo. However, after some thought I was hoping to take her up a notch.
So here's my question: Will it be advisable to make my motor a 2.8 turbo conversion, and
If "YES", what would I need to take it from 2.5 (Factory) to 2.8?

I have a T61 turbo, Mahle Pistons, Alpina Cam, Turbonetics external waste gate and Dicktator ECU. Everything else Is stock as far as the motor is concerned.

Thanks (in advance) for the help buds.

Boyracer out
maxdupmedia@yahoo.com