07 STI confusion

[JonesingForSpeed]

Hai,
I've been reading quite a bit about the 07 STI's and how hey are a bit different from all the other STIs. 
I read that they have a different restrictor pill than the previous years and when putting a TBE on it, the 07s dont like a TBE with no cats?  Need at least 1?  Im confused now.  I asked this same question in Nasioc but no one really gave me a straight answer. 

Im just wondering who I can call or email.  Thomas, I think you mentioned a Mike? HB Tuners or something like that?
Do you have his email address?  Maybe I can ask him.  Since he tunes, I wanna ask him in his experience what I should spend my money on to get the max power.  What exhaust, intake, etc etc has shown him the best #s.  And it being an 07 if theres any special instructions I need for it.

Or if you guys know, please let me know
Thanks
Ken

OH also, Ive been trying to look on Nasioc for people selling Accessports and exhaust, I cant seem to find anything, where should I be looking?  I found a few things on Ebay but they all say Married.  What happens if its married? 
haha, I know I should know these things, but Im very very new to all the electronics with the newer cars.  Use to working on all the carburated oldies.

[hoppergrande]

You can call HB Speed, there number is (714) 378-3966. John is the tuner there, they can help you with what parts to get and the cat issued. But I don't really think one exhausts will get you more power than another. They all have pretty much the same flow. Most people choose an exhuast based on look and sound. But you can ask hb and see if they noticed a difference in different ones.  Also check iwsti.com and ask about the cats. I think there is a whole big thread on there about the 07s.

With the accessports look in the scic classifieds on nasioc as well as the nasioc classifieds. You need to find a V2 (version 2) that is NOT married. If it is married that means it is already attached to another vehicle and can not be used on yours. Most of them on nasioc are unmarried.

[StuSSYsporT]

^i dont completely agree with what you said Thomas.

When looking into exhuasts, its NOT just about look and sound.  What you should be looking into is:

1. piping size
This is where most of your "performance" upgrade will come from.  Stock is 2.5" so getting anything bigger (ie.. 3") will increase performance. Ive also looked into (forgot the make) but a dual piping exhuast.... the cat back has 2 exhuast pipes, each 2.8" i believe, that basically equal a 3.5" or so size pipe.

2. any cats??  cats decrease performance

3. resonators? these restrict flow as well and decrease performance.

After that, then id agreed with Thomas' post... next is look and sound

[hoppergrande]

Thanks, I was typing in my phone and forgot to put that in. Chads right, you want something 3in atleast if your looking for the most gains. With non turbo cars you sometimes want a little back pressure. But on our cars you want as little as possible becuase the turbo needs to use the exhaust and get it out of the way. I'm not sure how restricting a highflow cat is, some say it is almost the same as no cat, but others say differently. So I would say get something 3 inch and catless for the performance, and as long as it matches that criteria it's up to you what exhaust you want based on look and sound. There is plenty of selection. You just have to ask yourself if you want something angled? Do you want it quiet and stealth or loud and deffning.

Thanks for clearing that up chad

[JonesingForSpeed]

Thanks for the info guys, I figured as much about the exhaust.  Im just really concerned about the restrictor pill and the cat issue with the 07s.  I hear people switching the 07s restrictor pill to the 06 pill and they say after that, the power gains are even more because of the VF43.  The pill is what fucks everything up.  If the pill stays stock, I guess a cat is needed, but with the 06 pill, these rules dont apply.  SO, I guess I will need to get an 06 pill and a 3" non catted turbo back that sounds fuckin evil.  I like the Invidia N1s sound, but I like the look of the Invidia G200.  Hmm, hard choice.   
Thing is, Im also concerned about cops.  Im thinking of going sleeper and putting an electronic exhaust cutoff.  Maybe using the stock axleback and just cutting it off right after the downpipe.  Bah we'll see.  I just dont wanna be one of those kids that spend all their money on cheap shitty upgrades on the cat and have it go even slower than stock iol. 

I guess this is the grocery list:
Cobb Accessport v2
06 Restrictor pill (damn 07s grrr!)
Invidia Catless DP
Invidia N1 race or G200 axleback
then Pro-tune

then call it a mutha fuckin day yo

[hoppergrande]

sounds good! if you want evil, get a cut out. they sound nasty.  i love my blitz but it is always loud and attracts a lot of attention.  TimeAtk (he just joined socalf4.com) has a cut out and is running the stock exhaust.  it throws people off when they see the stock muffler and hear that mean sound.

[ansonowicz]

if you want evil, get a cut out. they sound nasty. 

i concur. really, i do.

[JonesingForSpeed]

I FOUND IT!!!!!  After reading so many posts on all kinds of forums, it was on fucking Cobbs website all along....sigh..
But here it is:

2007 Subaru WRX and 2007 Subaru STi Potential Overboost Issues When
Operating the Vehicle With a Catless Exhaust System v1.00
 
We wanted to educate you about the potential consequences when operating a 2007 WRX or 2007 STi with a catless exhaust system. Subaru has developed a new boost control system on the 2007 Subaru turbocharged vehicles. The major change is the size of the hole in the restrictor pill located in the vacuum line connecting the compressor housing nipple to the vacuum T fitting in the boost control plumbing (see below pictures). Subaru has greatly reduced the size of the restrictor pills on the 2007 WRX and STi from the previous model years. These changes allow for a greater potential for the boost control system to over-run...in other words this is a mechanical function which can promote boost creep when the vehicle is operated with a free-flowing, catless exhaust system. Operating your vehicle under these conditions can cause premature turbocharger wear or engine damage.
 
Is my car effected by this change?
If you are operating the vehicle with a turbo-back exhaust that has at least one high-flow catalytic converter, then most likely not. If you are operating your vehicle with the appropriate Stage2 calibration and your engine hits a boost cut and your MIL or Check Engine Light has turned on reporting that P0244 has occurred; then this means that your vehicle was over boosting and the engine management system jolted the car and turned on your MIL to let you know the turbo has over-run. You are welcome to read through the Map Notes for the particular calibration you are running to make sure the vehicle is performing as it should; 2007 STi Map Notes Link or 2007 WRX Map Notes Link.
 
How can I test for this with my AccessPORT?
You can flash a Realtime Economy Mode calibration which turns your boost control system off so it will run the minimum mechanical boost pressure, which should be 5-7psi for the 2007 WRX and 8-12 psi for the 2007 STi. Using the boost measurement feature of your new AccessPORT, you can see if you exceed the mechanical wastegate spring pressure. If you operate your vehicle while under wide open throttle conditions with the Economy Mode calibration and you notice your boost levels greatly exceed these mechanical pressure levels then you will have to mechanically revise your boost control system, see below.
 
If my car suffers from this, can it be “tuned out”?
Since this over-run condition is created by a mechanical set-up, you would need to mechanically change the system and thus it cannot be tuned out.
 
What are my options?
If you purchased a new AccessPORT from Cobb Tuning or an Authorized Cobb Tuning Dealer, please contact the Dealer you purchased your AccessPORT from. Be sure to provide them with your original purchase receipt so they can provide you with a complimentary replacement vacuum line containing a larger restrictor pill. If you purchased your AccessPORT directly from Cobb Tuning, the please e-mail chris@cobbtuning.com with “2007 WRX (or STi) Replacement Vacuum Line” in the subject line so he can properly take care of you. This e-mail to Chris will need to contain your full name, shipping address, and invoice # so we can properly ship and track this item.
 
We highly suggest that you do not operate your 2007 WRX or 2007 STi with a catless exhaust system. If you have a catless exhaust system, we highly suggest you install at least one, post turbocharger high-flow catalytic converter to maintain some exhaust gas back-pressure after the turbocharger. If you choose to not follow our suggestions then you can purchase and install two items from your local Subaru dealership. The first item is Subaru OEM part # 09535A060, which is a replacement vacuum line where the restrictor pill will be located. The second item is Subaru OEM part # 22326KA120, which is a new restrictor pill that has a center hole machined to 1.20mm or .047”. The total retail cost for both of these items should be less than $6 USD. The restrictor pill will need to be carefully inserted in the middle of the vacuum line so the air can pass through the restrictor pill. It does not matter which way the restrictor pill faces as longs as the machined hole is perpendicular to the hose and air can pass through the pill.
 
How do I replace these vacuum lines?
We suggest you replace these vacuum lines only after the engine and turbocharger system has sufficiently cooled down so you do not burn yourself on the hot engine components. Your engine can take up to 6 hours to fully cool down. The below diagram goes over the specific line you are supposed to remove and replace. The replacement vacuum line w/ restrictor from Cobb Tuning pill will have an orange paint mark. Please be sure to re-use all factory hose clamps.



You can read the document on this link for more specific details about How Subaru's Factory Boost Control System Works if you are interested.
 


Line 1 plumbs the compressor housing to one end of the T-fitting. This line contains the brass restrictor pill.
Line 2 plumbs the wastegate actuator to the opposite end of the T-fitting.
Line 3 plumbs the middle of the T-fitting to the wastegate solenoid valve.
Line 4 plumbs the other side of the wastegate solenoid valve to the turbo-inlet pipe.
 
NOTE: You will notice your factory boost control system has more than four vacuum lines, because the factory uses couplers to connect the different size nipples to one section of line. For all intensive purposes you still only have four sections of line.

[hoppergrande]

Good find. I'm guessing you are going to go with a carted dp then.

[JonesingForSpeed]

OH nono, the fix is just to replace the restrictor pill.  Its just a tiny part that cobb provides for free i guess.  If they dont provide it for free, i just have to purchase a "line 1 hose with the restrictor pill" from an 06 and call it a day.
Im gonna go catless

[hoppergrande]

Ah, well you can get the 06 restrictor pill already in that T hose for like 25 bucks I think. I had to buy a new one a couple of months ago

[JonesingForSpeed]

guys,
Im thinking of grabbing a DP to go stage 2.  Im really thinking about keeping my stock catback.  I know that stock is a 2.5" with a 2.5" muffler.  I hear the stock catback flows pretty well, just wondering if anyone has any experience going stage 2 on a stock axle back or full stock cat back and if this sucks or is any good?
(Stage 2, Invidia or Cobb DP + stock everything else behind it)
Or better yet, if its even do-able with the 07 setup?

Thanks
Ken

[ansonowicz]

guys,
Im thinking of grabbing a DP to go stage 2.  Im really thinking about keeping my stock catback.  I know that stock is a 2.5" with a 2.5" muffler.  I hear the stock catback flows pretty well, just wondering if anyone has any experience going stage 2 on a stock axle back or full stock cat back and if this sucks or is any good?
(Stage 2, Invidia or Cobb DP + stock everything else behind it)
Or better yet, if its even do-able with the 07 setup?

Thanks
Ken

Back when the wagon was only 3 weeks old (approx 3k miles) I ran:

2.5" UN Catted DP ---> Stock Cat ---> Stromung 2.5" Cat Back.

I ran stage 2 like this for about 40k miles with no problems whatsoever.  I would imagine my catback system flows about as much as the STI 2.5" catback?

[JonesingForSpeed]

I just called cobb,
they said that for a daily driver, its ok, but if I plan on doing any kind of aggressive driving, then it may cause problems.  The excessive back pressure will eventually lead to detonation and may cause problems in your turbo.  Its better to get a full turboback to avoid this specially with an 07 STI.

=(

BASTERDS!!!

fuck it,

Invidia or Cobb Bell Mouth DP
Blitz Nur-Touring or Invidia G200
here i come...

[dragonwrx1]

Hey ken there is a downpipe from perrin which is a two piece and it has two high flow cats for about 600ish incase you wants some cats in your turboback. or there is a cheaper one from perrin with a single highflow cat

This is the perrin with the two piece, two high flow catted DP
http://www.jscspeed.com/wrx/uppipedownpipe/perrin_downpipe_cat.htm[/url]

[hoppergrande]

ive heard you can run stage 2 with the stock cat back. but cobb would probably know better.  you can find cat backs that look stock and are very quite as well.

[dragonwrx1]

ive heard you can run stage 2 with the stock cat back. but cobb would probably know better.  you can find cat backs that look stock and are very quite as well.

oh yeah!! such as Borla Hush, Maddad whispercatback, cobb catback, (SPT but it tapers to a 2.5 at the midpipe then becomes full 3 inch), i think anson has a stromung that very similar to a cobb catback.

[paulsaidhi]

chad your a ricer!

[JonesingForSpeed]

sweet, yeah I get a pretty decent discount with Perrin. 

I've actually forgot all about this stuff, been so busy.  Look at the time, its freakin 3:32am and Im still workin...  I need help guys.  Is there anyone here good with setting up shopping carts for a website?  www.jonesingforspeed.com (click on the JFS store) Thats what I've been trying to set up.  I still need to setup the categories better.

I just have so many items... Probably like 1000+ that I want to implement on to the store.  I'll pay in parts!  Let me know if you wanna hit this shit up, Im dying...

You'd have to come up to Hesperia to my house so that I could teach you how I want it done.   It'd have to be a weekday, cus the next few weeks I'm going to have family over or will be gone visiting family.
Please let me know
Thanks guys
Ken

OH and Anson, I need to talk to you when you have a chance.
I have a business prop I need to talk to you about
I'll send you an email.

[StuSSYsporT]

chad your a ricer!

whaa???  random post huh