I'll say it again... CAMS.

You still running with the SM4?

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

yeah its in now

Your saying the p20 vf34 can reach 320hp? How much boost you running with that setup?

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yes,
how much boost?
Dunno..but hes got a forged EJ207.. so put 1.8bar in, some bigger injectors and it will definatly be right up there.

On mine im running 20psi, but nothing to judge by as my instructions were for quick tune street tune so i can have boost control - in order to setup my Aquamist properly, before it gets tuned again.

I was running only wastegate pressure with the stock ecu.

I agree with Joesac. Pull the heads off, port and polish (be prepared to pay 1000's, a good port job takes a shit load of time, and can be expensive), throw some 10mm cams in, and match port the intake manifolod while you're at at.
That with P20+2bar=320 easy.

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so what your saying tode is buy some bigger injectors and a p20?? what difference will the p20 make over my p18?

it will make 2 difference..

im saying that if u want to acheive at least 320hp, then ur talking more boost and fuel.
vf34-p20 will acheive that for you, but ur gonna have to push it more than you would a td06.
Your Autronic is a great computer - and essentally just pay for a thorough tune to make it all work like it should.

dont bother with a tdo5 - might as well buy a p20 housing and create something similar.
Td06 - too laggy for a 2ltre i rekn.. (i had one)

also a nice set of headers will certainly help.

sell rex, buy evo + full zorst, verso and cams... 310+hp all day...