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Old 08-29-2014, 03:19 PM   #1
mkimpflen
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Member#: 355324
Join Date: May 2013
Chapter/Region: South East
Location: Mobile, Alabama
Vehicle:
2006 STi
Alpine White

Default Where to begin with an STi

So I've had my 2006 STi sedan for about one year now and I'm finally settled into a stable career and have some extra money that I can throw at it. I've read through a lot of the different stickies and threads. Unabomber's Manifesto was great, but it's a bit outdated on some topics now, and mostly directed at N/A or WRX owners as far as I can tell.

I've got an Invidia N1 catback on already. Here's a list of the modifications/ parts I was debating on. Please let me know if there's anything I'm overlooking here, or something I should consider adding first.

-Cobb AP v2 or v3
-Invidia divorced/catted DP
-Perrin front mount intercooler and short ram air intake (this is where I eventually want to be, not sure if I should do a CAI for awhile first rather than jump straight to the front mount)
-Cobb shifter w/ bushings
-HKS Hybrid BOV

This car still has to be a daily driver for the next couple years but my goal is to eventually have it as a track car. Any constructive feedback would be great. After all, we all have to start somewhere.
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Old 08-29-2014, 03:30 PM   #2
Gallo2011
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Join Date: Dec 2010
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Location: So Kali
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2011 SSM STI saloon
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Well at least you gave us an explanation of what your plans are for the car in the next few years. That's something.

Cobb AP? Sure, why not. It's a nice tool to have and can be used to tune with now and later. v3 is my recommendation. Latest and greatest and all.

Invidia catted DP. Have one. Like it. Go for it.

Cobb shifter w/bushings. Sounds good.

After that, things get a bit fuzzy. FMIC and intake. Why? Your stock intercooler and intake work very well now and will at stage 2 or higher. Unless you plan to go really big, I suggest skipping these two and working on making the car lighter instead. Light track cars are yummy.
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Old 08-29-2014, 03:33 PM   #3
Yanbags
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Join Date: Aug 2013
Chapter/Region: Tri-State
Location: Staten Island, NY
Vehicle:
2013 STi Limited
DGM

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-Cobb AP v2 or v3
-Invidia divorced/catted DP
Yes to these both, but get a protune by an experienced tuner - you'll thank yourself for it.

-Perrin front mount intercooler and short ram air intake (this is where I eventually want to be, not sure if I should do a CAI for awhile first rather than jump straight to the front mount)
Both unnecessary. You don't need a front mount unless you decide to go big power, and you'll get more turbo lag from extending the distance the air has to flow. OEM top mount is perfect for stage 2 power levels. Short ram intake = Hot air intake. If you really want it for the noise, get a CAI, but it does barely anything more.

-Cobb shifter w/ bushings
Your own personal preference.

-HKS Hybrid BOV
Just no.

If your goal is to track this car, I would highly recommend that you get a bigger fuel pump, injectors, and an AOS/catch can setup. This isn't only specific for the track, it'll give you a better safety blanket instead of pushing the stock fueling to the limits and keep oil out of your intake tract. You can talk about those goals/options with your tuner as he'll usually recommend what he has the most experience tuning with.
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Old 08-29-2014, 03:47 PM   #4
Gallo2011
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Church!

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HKS BOV was so far off my radar I didn't even mention it.

As Yanbags and Nancy Reagan said, just say no.
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Old 08-29-2014, 04:33 PM   #5
sc00by4life
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most upgrades past stage 2 are nearly the same for the wrx or sti.
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Old 08-29-2014, 05:29 PM   #6
HinshawWRX
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GT3 (Currently on Fire)

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Budget, goal. Figure it out. We can't help you otherwise. You should read the manifesto.
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Old 08-29-2014, 08:00 PM   #7
BlackDahliaInFlames
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Location: Findlay, OH + Cincinnati, OH
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2015 STI Launch Ed.
WRB+Gold

Default

Get a Cobb AP and a Cobb SF intake. Flash the Stage 1+SF intake tune and you will have a bump in power, plus the intake will give you the sound you are looking for with a BOV minus actually installing a BOV. I love my SF intake. I know the gains are negligible, but it sounds amazing.
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Old 08-29-2014, 08:16 PM   #8
gfautt
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It really depends on your goals. for now I would get the Cobb V3 and go with the Stage 2 tune/map on 91 Octane and parts you may need to work with that

and see how you like that but if you want to go big then you may want to upgrade your turbo, fuel injectors, FMIC, pro tune.

I have a 2005 STI with:

Built motor ( forged rods, pistons and head studs)
850cc injectors
gt 30 76 rotated turbo
FMIC
down pipe
cat back
water meth injection
protune
cobb access port V3
fully adjustable coil overs and lowered a little


Im running about 25 PSI and I love my setup right now


So it depends on what you want to spend. Im sitting around 450WHP and most cars on the road cant hang with me. I also use this car as a daily driver and its great. I average 22MPG and I drive half highway and half city to work.
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Old 08-29-2014, 10:34 PM   #9
HinshawWRX
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GT3 (Currently on Fire)

Default

Quote:
Originally Posted by BlackDahliaInFlames View Post
Get a Cobb AP and a Cobb SF intake. Flash the Stage 1+SF intake tune and you will have a bump in power, plus the intake will give you the sound you are looking for with a BOV minus actually installing a BOV. I love my SF intake. I know the gains are negligible, but it sounds amazing.
Yes, waste money on an intake so you can get sound and littler power.
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Old 08-29-2014, 11:12 PM   #10
BlackDahliaInFlames
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Location: Findlay, OH + Cincinnati, OH
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2015 STI Launch Ed.
WRB+Gold

Default

Quote:
Originally Posted by HinshawWRX View Post
Yes, waste money on an intake so you can get sound and littler power.
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Old 08-30-2014, 09:28 AM   #11
mkimpflen
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Join Date: May 2013
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Location: Mobile, Alabama
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2006 STi
Alpine White

Default

-Thanks to everyone that had constructive offerings for me. I really wanted to gauge reactions about the BOV because there's such a huge divide in owners on them. Thanks to everyone for helping to point me in the right direction. After being in the DC area, I was spoiled with all the subaru owners and car meets available. Now that I'm in the dirty south, it's harder to find subarus.
-HinshawWRX, my budget for the near future is 6k, and I've read the manifesto exhaustively. I have nothing but praise and great things to say about it.
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Old 08-30-2014, 12:45 PM   #12
HinshawWRX
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Vehicle:
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GT3 (Currently on Fire)

Default

There really isn't a big divide over BOV's. The people who know what they are talking about understand they are nothing but a hassle for a dumb sound.
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Old 08-30-2014, 03:29 PM   #13
gfautt
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2005 STI Built :)
Black

Default

Well then go with what you want my friend 6k is a great place to begin at. But know that if you plan for anywhere near 375-400 whp you will need to build your motor do no wait until it breaks because that is much more expensive if it breaks badly. Yes it can break without extra damage but I wouldn't risk it. Also think about what kind of power curve you want to feel. I do not have hoarded headers or manifold or cams most of my extra power is my turbo and water meth allowing the higher boost levels. So my power curve is very unlinear and I don't have a lot of natural torque and HP but I'm fine with that because I love the way my boost hits and etc. and of course the 2.5 ltr engine is great before the turbo in my opinion anyways. But if you want to begin with natural power to have a slightly more linear power curve then go with things like headers, intake manifold and etc before upgrading turbo but that can be expensive. Hope that helps man let me know if you wanna know more about how my build feels. I think right now I'm right at 450whp and 417wtrq
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