Port out a stock turbo, anything aftermarket will spool slower than stock.

I get 19psi right around 3000rpm depending on the gear with an IHI VF29 on my WRX but this turbo wont bolt up to anything other than a Subaru.

What kinda car are you working with? The Garrett GT28RS is supposed to spool very quickly as an aftermarket turbo. A small turbo with a small aspect ratio will spool quickly.