Mikey K

Right decided to get shot of the Legacy tourer and move to a Hawkeye WRX wagon.
I'm used to a 400 BHP Honda S2000 so I need more than 225 BHP
What I don't want is a loud unreliable car that cost me a fortune.
So I need some advice to get ~300 BHP out of it and still keep it as a daily drive.

So far I worked out!:
Cold air feed to standard airbox (not sure on the detail yet)
Panel filter (K&N/Green?) I presume these are cleanable?
Decat up pipe (H&S/classic?)
Decat down pipe (H&S?)
Sport cat (Prodrive/H&S?) I want to pass an MOT
Mild back box not too noisey (not sure which one!)
NGK PFR7B plugs
Walbro 255 fuel pump
JGM/ECUtek remap

Maybe (if I'm feeling brave)
STi TMIC with scope & tray
sti 550 fuel injectors
sti turbo

I'll get on to the handling shortly

addison

you have 550 injetors if its the same as a uk

read this link AndyForrestPerformance

Mikey K

Still on the learning curve
That's very useful!
So do we know if a turbo back decat will pass an MOT with just the up pipe cat in place?

uk300scoob

iTrader: (24)

you wont get 300 bhp out of the td05 wrx turbo im speaking from experience with my 07 wrx

escott

iTrader: (1)

No, maybe more like 270/280, although a bucketload of torque which should feel great. It should be in the region of 330lb/ft.

You can make good improvements to the handling for next to nothing - rear droplinks and ARB makes a big difference, and don't ignore the brakes. A pad upgrade would be a worthwhile start.

joz8968

iTrader: (13)

Edited.

Brun

Although the more usual figure for the TD04 is 270-280bhp, 300 bhp has been achieved on more than one occasion with this turbo

joz8968

iTrader: (13)

Indeed.



As Brun has sited, this is very much the exception!

If you don't EXPECT 290-300, then you can't be disappointed.

Jolly Green Monster

iTrader: (4)

you uppipe has no cat in anyway.

if you want hassle free mot emissions then sportscat downpipe needed..

quiet echausts or quietish but nice noise still - revolution or miltek

the torque is the biggest gain on the standard turbo 340lb and about 280bhp..

Simon

escott

iTrader: (1)

Hi Simon how's things?

One quick Q - doesn't the WRX have a cat in the uppipe?

To add to the quiet but decent sounding backboxes - Subaru WR Sport, which is oval, or the Prodrive, which is very similar but round. I've had both, the WR Sport sounds a little fruitier on startup, the prodrive sounds better on full chat (IMHO).

Jolly Green Monster

iTrader: (4)

Very good thanks.. you?

I don't believe the 2.5 wrx has a cat in the uppipe..

dynamix

iTrader: (3)

It doesnt.

escott

iTrader: (1)

Good - car is still running superb!

Didn't know that about the 2.5's - is that why prodrive don't fit a sports cat for the PPP?

Mikey K

Great feedback guys thanks very much!
No need to touch the up pipe then!
So am I right in thinking I need decat down pipe and centre sports cat (plus the back box)
Other than Prodrive anyone good for the cat?

I know the STi TMIC upgrade is a good idea on the "blobs" is that also true on the "hawks"?

I'll edit the first post to add a final list.

BTW sold the Legacy today as well!

Mikey K

Forgot
Is there any point in cooling the plugs at this level
Are there any effective cold air intakes or is it a waste of money?
Looking forward to parking it next to this!