Either you have a TD06 on an RB25DE and you dont realise you dont have an RB20...or its a type and you meant 4200rpm...or something else is going on. I know of a few TD06 setups getting around now and there is no way on earth most people are making 16-20psi at 3,400rpm and still making 270rwkws.
Interesting for Femno and Russman to drive my car with a TD06-20G when i get back on October. The 2530 is a good thing, but i am still tempted to say the slightly laggier TD06-20G is worth living with for the wider power band and 30rwkws odd more power it can give you. I am making about 19psi at 4,400rpm or something. But really, it doesnt get its boogie on until about 4,600rpm, irrespective what the boost guage says
Bu agree with URAS, combination of wheel sizes and housings mean its probably a turbo better off an RB25, not a lower compression, shorter stroke smaller cc RB20