I'd recommend if your having a cr t38 to not be looking at figures of 460 as people say.

With a ported head, (ours are nick waples) a inlet cam and a cr t38 at 26/7 psi the engine will show 450bhp on our dyno.

These turbos don't like big boost so aim to make the power around the boost pressure I just said above!

If you are not porting the head don't expect big power, 430 would be realistic IMO! And with standard cams that will make peak power around 6-6500 rpm

A inlet cam and some head work makes this spec engine so much more revvy, happily to 7500.

I think you should ask yourself what power you actually want/need then go from there

If your wanting 460-470 for example dont bother with that turbo. Tests my honest opinion mat