how can i get my 54 plate wrx up to 320BHP with not much more work done to the car with these mods already on the car at the moment-

HKS induction kit
HKS ssqv blow off valve
HKS de-cat downpipe
Afterburner vortex back box
STI tmic

and the car is always run on shell v-power.

 

remap would heklp but i dont think you would get at 320...

 

remap and vfxx turbo or tdo5

 

Induction kit and dump valve are probably worth the square root of diddly squat in terms of significant extra ponies mate.

To make 320, you'll need: Decat/sports cat D and decat/uprate rest of exhaust system, uprated fuel pump (walbro), 3 port boost soleniod, bigger turbo (VF35 best response at that level) uprated turbo hoses are a good idea, std ones can split under increased boost, ported and wrapped headers also a good idea. Then an Ecutek remap by someone good!

Power doesn't come cheap.

Have a word with David at Api for some impartial advice. Tell him Ns04 says hi!

Ns04

 

You car has a TD04 turbo as standard which is only good for around 280bhp on a good day.
I have done the TD04 > VF35 on my classic and im very happy with it.

As usual Ns04 is spot on.

Cheers Mike