what kind of t25 do you have? there are about 10 different types. id tag should be on the centre cooling housing and it has a model number on it. fyi they range from .48 (eg twin turbos off skyline) to .86 air ratios (eg s15 200sx). and those turbos are varstly different in size too? unless the turbo is really small full boost at 2000rpm is not realistic depending on how much boost. 6-8 psi probably might.