[Acejam2k]

Hey all,

Recently I've been thinking about getting a custom tune for my 07 STi. I'm currently at a simple stage 2 setup with a Cobb AP v2 93 OTS Map, Helix Catted DP, and an Invidia N1 Race Catback.


Keep in mind any mods that I do to this car must be reliable, considering it is my daily driver, and I drive a lot. I also autocross the car a lot, and actually won the BSP class for the New England Region SCCA this past season. For a couple events, I was only running 1-2 seconds behind a 350whp EVO on r-compounds.

Therefore, I'd like all the mods to be reliable and safely done. I've been thinking about running the following setup:


Cobb AP V2
Helix Catted DP
Invidia N1 Race Catback
Stock Turbo

I want to add:
Custom AP Tune
Walbro 255lph Fuel Pump
700/750/800cc Fuel Injectors
Grimmspeed Ported/Polished/Ceramic Coated Exhaust Manifold w/ new Crossover pipe
APS Turbo Inlet (maybe? thoghts?)


Right now I'm also on stock suspension, and just plan to get sways in the meantime, to help out my RE01-R's.

Any thoughts on these additional mods? I want good reliable power, but quick spool, and therefore want to keep the stock turbo.

Thanks guys!

[Loubaru]

Sounds good...

You are going to also want some sort of boost solenoid, most tuners seem to like the 3 port ones. Also, unless you have extra money laying around I wouldn't mess with the manifold or inlet, gains would probably be minimal. Do you plan on upgrading your turbo in the future or something? 700-850s are pretty big for a simple stg 2...

[Acejam2k]

Originally Posted by CKLewis

Sounds good...

You are going to also want some sort of boost solenoid, most tuners seem to like the 3 port ones. Also, unless you have extra money laying around I wouldn't mess with the manifold or inlet, gains would probably be minimal. Do you plan on upgrading your turbo in the future or something? 700-850s are pretty big for a simple stg 2...

I havent made any decisions obviously, but in the future a built motor and a turbo swap could definitely happen, but thats probably about a year or so away.

I have never gotten a custom tune before, but I just exchanged a few emails with the tuner who I am most likely going to use, and he said that injectors arent really needed at all on the stage 2 setup, but he does recommend the fuel pump.

Therefore, it looks like I'm gonna go with a Walbro Fuel Pump, and a custom tune, and go from there.

[mgsm666]

^^ sounds like a good recommendation from your tuner. The injectors are serious overkill, and will make it very difficult to tune, whereas the pump doesn't need a tune, and is a great safety net of sorts.

Good choice. Now for the most important one: do you have a TRUSTED tuner?

Its like open heart surgery...do you just pick a doctor that advertised in the newspaper? Or do you get some recommendations, and do some research.

This is your car's doctor in a sense...make sure he (or she) is a good one.


Jesse

[Tortfeasor STi]

Sounds good to me. I would just add a +1 to going with an experienced tuner, too many people have been getting bad tunes recently for me to trust my car to just anyone. I did not see any mention of a cold air intake in your mod list. These can make some decent gaines given their cost when your car is tuned for them.

[Acejam2k]

I've though about a CAI, but I've always read that with a simple stage 2 seutp the stock airbox is more than adequate.

I'm thinking about taking it to XX Tuning. I've been there a couple of times before for open-houses, and they always receive raving reviews. Not to mention, its only just an hour from me.

[subaru_sti293]

Originally Posted by Acejam2k

Hey all,

Recently I've been thinking about getting a custom tune for my 07 STi. I'm currently at a simple stage 2 setup with a Cobb AP v2 93 OTS Map, Helix Catted DP, and an Invidia N1 Race Catback.


Keep in mind any mods that I do to this car must be reliable, considering it is my daily driver, and I drive a lot. I also autocross the car a lot, and actually won the BSP class for the New England Region SCCA this past season. For a couple events, I was only running 1-2 seconds behind a 350whp EVO on r-compounds.

Therefore, I'd like all the mods to be reliable and safely done. I've been thinking about running the following setup:


Cobb AP V2
Helix Catted DP
Invidia N1 Race Catback
Stock Turbo

I want to add:
Custom AP Tune
Walbro 255lph Fuel Pump
700/750/800cc Fuel Injectors
Grimmspeed Ported/Polished/Ceramic Coated Exhaust Manifold w/ new Crossover pipe
APS Turbo Inlet (maybe? thoghts?)


Right now I'm also on stock suspension, and just plan to get sways in the meantime, to help out my RE01-R's.

Any thoughts on these additional mods? I want good reliable power, but quick spool, and therefore want to keep the stock turbo.

Thanks guys!

Check this guys they really good tuning STI 07:

1.) YouTube - Broadcast Yourself.

2.) YouTube - Dyno Flash STI test drive and ICS Tour


This is what i worried about the STI 07 and check this link:

1.) cracked piston, not even 11k on 07 sti - Factory 2.5L Turbo Powertrain - NASIOC
2.) Blown engines on 2007 STi - COBB Forums



You can call this tuner ask for Mike Innovative Tuning - Performance Parts, Dyno & Engine Tuning Services

This is my set-up


1.) Serious stuff: forged pistons , rings, forged rods, forged crank

2.) Cobb AccessPORT v2

3.) Invidia V3 Down-Pipe

4.) HKS HI-POWER

5.) APS 65mm cai

6.) Walbro 255lph fuel Pump

7.) GTSPEC GENII Exhaust Header w/ Up-Pipe (SKU: GTS-PER-1016 ) is this good headers?


8.) DEFI BOOST GAUGE .

A.) Greddy Profec B and Apexi AVCR

I only need like 360 to 370 horse power , the reason i want to change the piston coz to be

more safer not to blown the engine or crack the piston and ring.

[niemkij]

I have an 06 STi. I went from 290 WHP to 320 WHP with a custom tune.
I have a full 3" turbo-back exhaust (with cats) and AcessPort. I was using the stage 2 93 octane ots map previous to the custom tune. I did the Perrin turbo inlet.
Also, I had installed the GrimmSpeed Pnp intake and throttle body and the ceramic coated cross-pipe and up-pipe. Even though there is not a cat in the 06 STi up-pipe the GrimmSpeed one flows better than the stock one. Perrin's web site has some dyno data that shows a performance gain with an up-pipe on an 06 STi.
I would skip the injectors until you go with a bigger turbo, but definately do the Walbro fuel pump.

[Sti491]

My original goals were for a pretty decent autcrosser and DD. I have now settled into kick butt DD short of a bigger turbo. See my mods in sig. My car has been very reliable. You are going a good direction. You may want to add an EBC so your protune will hold boost with better precision than OEM.

Don't forget when you need a clutch get one that's driveable, and suspension mods really make this car shine. I don't think Imprezzas will ever turn in with great precision, you can improve it...but you sure make them corner exit like a banshee controling direction with your right foot! Woot Woot!

[wrxcelration]

Subscribed- Im stage2 myself and am looking for a little more out of my DD