Did you read my mod list? That's a catless exhaust. I know WRXs like the back of my hand.
Getting STi performance out of a WRX costs money. 300awhp is obtainable if you have $6K to spend on mods and a good tuner.
And those internal wastegates are fine. They just wont hold more than 25psi without leaking boost, which is more than you need for the ammount of power you can expect to make out of an IHI turbo. The really fast WRXs out there, most of them, are running FP Greens, or even T61's with external wastegates.

IWRXIT- You can crank up the boost on stock timing and fuel all you want. It's only a matter of time before you blow the motor.
What are you running for engine management? You shouldn't need a boost controller since the ECU controlls boost. Any piggyback can be tuned so that the boost matches the fuel map, and most importantly, KNOCK CORRECTION. That's what their for.
And if you haven't had it re-tuned for the VF39, you're wasting a lot of power.

 

Here ya go.


[IMG]local://upfiles/8332/BC7E1C70F73249A5AC176BA1B2FEB2B8.jpg[/IMG]

 

more (it wont let me attatch more than one at once)


[IMG]local://upfiles/8332/F8CEAEB43DA6450399D239FC4D8C3311.jpg[/IMG]

 

Before the drop

 

i'm running on the cobb stage 2 93 octane map right now. i am at the crossroads of going for the vf-30 reflash or staying put until i do the injector mod. i already did the fpr mod so i have 60 psi at idle which is more than enough fuel for the vf-39. i dont feel the need to remove my mbc anymore. i took it off the day i got my stage 2 installed.
i dont like the ecu stepping down my boost when it sees fit. i could only get 12 psi in first. not to mention the cobb's inherent low boost problems. with boost dialed in at 16 psi the car pulls a lot harder now but i can feel the ecu pulling timing. the adaptive nature of the ecu is what keeps the motorrelatively safe.

 

The ECU wont pull timing if you get it tuned right.
Just get a UTEC. Anybody can tune it, and it'll only cost you the dyno time.
Cobb is great if you're done modding the car, but you're options are limited if you decide to change something, even with the access port.

 

Oh shnap. I didn't realize you were the same WRXIT from "fanatics".
My fault.

 

i was done modding until i got into the 12's. now i want 11's. i may get the utec this winter. i tried to avoid it and wait for cobb to come out with a 39 map but i'll know in 2 weeks if i'm gonna race anymore. i know the car is faster, but if i'm not running 12.4 the bottle goes on and the boost goes down. all i need is one 11.99 pass, then i can retire my car to grocery getter status.

 

Good luck with that.
You'll never be the same again.

 

Ok ok thats enough of the technical stuff. Its nice to see that there are many WRX fans out there including myself, but lets cut to the chase - Who is faster?

2003 5 spd GT with intake and exhaust mods

OR

2004 Impreza WRX stock (Not STi)