Welcome to the North American Subaru Impreza Owners Club Saturday September 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > AccessPort

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 06-15-2006, 01:05 PM   #1
subywrx
Scooby Specialist
 
Member#: 81858
Join Date: Feb 2005
Chapter/Region: BAIC
Location: Bay Area, Calif
Default Access port question

How much or safe is getting a cobb access port for MY04 WRX? I have a gutted downpipes, MBC (not installed) and sti cat-back. Will it be worth it to get the access port and can the stock ecu be program back to stock spec without a problem? I just want to keep it as stock as I can without the wife knowning.
* Registered users of the site do not see these ads.
subywrx is offline   Reply With Quote
Old 06-15-2006, 01:18 PM   #2
johsti
Scooby Specialist
 
Member#: 36049
Join Date: Apr 2003
Chapter/Region: BAIC
Location: San Jose
Vehicle:
2014 FXT Premium
Silver

Default

Do it! Gut your uppipe if you haven't already. Get the AP and go see Mike @ Gruppe-s for a pro-tune. It is very safe, especially with a custom tune. The MBC is very unsafe; sell it.

I just got protuned a few days ago, and put down 209.5 WHP and 205 lbs./Tq on the Gruppe-s Mustang dyno. Stock WRX's put down around 155WHP on this dyno. Only mods were sti uppipe, stromung shorty DWG DP, IC Hose and STI axleback. I still have my factory 3rd cat and resonator pipe.
johsti is offline   Reply With Quote
Old 06-15-2006, 01:20 PM   #3
johsti
Scooby Specialist
 
Member#: 36049
Join Date: Apr 2003
Chapter/Region: BAIC
Location: San Jose
Vehicle:
2014 FXT Premium
Silver

Default

Yes you can revert your car back to stock when needed with the AP.
johsti is offline   Reply With Quote
Old 06-15-2006, 01:37 PM   #4
subywrx
Scooby Specialist
 
Member#: 81858
Join Date: Feb 2005
Chapter/Region: BAIC
Location: Bay Area, Calif
Default

Do I have to gut the up-pipe? I replaced it back to stock and its way too much work to take it back out again. Do you think keeping the uppipe be fine?
subywrx is offline   Reply With Quote
Old 06-15-2006, 01:45 PM   #5
johsti
Scooby Specialist
 
Member#: 36049
Join Date: Apr 2003
Chapter/Region: BAIC
Location: San Jose
Vehicle:
2014 FXT Premium
Silver

Default

You had a catless uppipe in there previously and you took it out to put the catted stocker back in???

why???

It is a lot of work, but that cat needs to be out of there. It's not mandatory, but you do run the risk of having the catalyst material breaking up and getting sucked through your turbo, especially if you're running higher boost, etc. Also it helps your turbo to spool a little quicker. Subaru isn't even putting cats pre turbo anymore.

Also, since you have an 04, and gutted cats, you're taking a big risk by not having some sort of EM. I would get some EM ASAP before you break something. Look into the open/closed loop fueling issue that Subaru implemented in 04.
johsti is offline   Reply With Quote
Old 06-15-2006, 02:05 PM   #6
subywrx
Scooby Specialist
 
Member#: 81858
Join Date: Feb 2005
Chapter/Region: BAIC
Location: Bay Area, Calif
Default

I replaced back because I wanted to go back to stock but months down the line I got a gutted down+mid pipes and sti cat-back. So what you're saying is with my catless tbe it's not safe for my WRX? I mean how?
subywrx is offline   Reply With Quote
Old 06-15-2006, 02:35 PM   #7
johsti
Scooby Specialist
 
Member#: 36049
Join Date: Apr 2003
Chapter/Region: BAIC
Location: San Jose
Vehicle:
2014 FXT Premium
Silver

Default

http://forums.nasioc.com/forums/show...en+loop+closed

There are many more threads that discuss it, but here's one. Do a search for "open loop closed loop" and you should find more info.

I was running a shorty catless DP with no EM when I first got my car, and it was bucking under acceleration at around 3.5-4k rpms under WOT. EM solved the problem.
johsti is offline   Reply With Quote
Old 06-15-2006, 04:05 PM   #8
subywrx
Scooby Specialist
 
Member#: 81858
Join Date: Feb 2005
Chapter/Region: BAIC
Location: Bay Area, Calif
Default

If I was to get a gutted up-pipe, do people usually plug the EGT hole and unplug the EGT? Do you think I can pass smog with catless up-pipe but with catted down+mid pipes? I'm really interested in getting the ap but I'm worry when smog comes around. How fast/faster you think your car performed? I heard with a setup like yours you can keep up with EVOs.
subywrx is offline   Reply With Quote
Old 06-15-2006, 07:00 PM   #9
johsti
Scooby Specialist
 
Member#: 36049
Join Date: Apr 2003
Chapter/Region: BAIC
Location: San Jose
Vehicle:
2014 FXT Premium
Silver

Default

You don't have to smog your car for 6 years unless you sell it.

You should pass smog without your uppipe cat since it is only for cold sart emissions. Just put the other 2 back in and make sure your car is warmed up. A gutted uppipe looks stock, so it would pass visual (not that you can really see it anyways).

The AP will take care of codes, but you can also use a resistor, and you need to plug the EGT hole with a bolt. I've never gutted an UP, so I can't tell you all the specifics.

As far as keeping up with an EVO, I doubt it. I think a stock Evo puts down about 210-215WHP on Gruppe-S dyno, but with better gearing, brakes, suspension, etc. It is fun though, and makes for a great daily driver.

It put down 202WHP and 195lb/tq with the cobb CA stage 2 map. My car was running a bit lean though. Mike made a safer and more powerful tune compared to the OTS Cobb map.

Last edited by johsti; 06-15-2006 at 07:10 PM.
johsti is offline   Reply With Quote
Old 06-15-2006, 07:05 PM   #10
subywrx
Scooby Specialist
 
Member#: 81858
Join Date: Feb 2005
Chapter/Region: BAIC
Location: Bay Area, Calif
Default

Thanks a lot johsti.
subywrx is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
02 4EAT Access Port Question... semipro Engine Management & Tuning 5 09-28-2005 05:14 PM
Need help on access port question? titanium wrx Engine Management & Tuning 3 11-29-2004 01:14 AM
Access Port Questions JLOWRX Texas Impreza Club Forum -- TXIC 3 08-16-2004 02:50 PM
Access Port Questions JLOWRX Texas Impreza Club Forum -- TXIC 13 07-23-2004 03:49 PM
Cobb access port questions SoonToBeRexed Newbies & FAQs 12 07-05-2004 10:03 PM


All times are GMT -4. The time now is 08:08 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.