Tune necessary for catless uppipe?
+ Reply to Thread
Results 1 to 9 of 9

This is a discussion on Tune necessary for catless uppipe? within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; As the title says, I am wondering if a tune is necessary for installing a catless uppipe on an 04 ...

  1. #1
    Registered User
    Join Date
    Jul 2008
    Location
    sussex county, new jersey
    Posts
    47

    Tune necessary for catless uppipe?

    As the title says, I am wondering if a tune is necessary for installing a catless uppipe on an 04 wrx. Yes, I have read a whole bunch of posts on this topic which seem to have a constant debate (which could be the result of this post) with a lot of people saying that there is no tune necessary, just an ECU reset, and then many other people saying you can run the risk running lean without getting a tune or anything. That seems to make a lot of sense to me because if you are eliminating the cat in the stock uppipe then there will be more free flowing air into the turbo. Am I mistaken or is the increase of air negligible for a tune?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User wreckingball man's Avatar
    Join Date
    Jul 2012
    Location
    Rocky Top
    Posts
    2,324
    No, read the second paragraph in this thread.

    Attn '02-'05 WRX Owners: The Importance of the Uppipe Mod

    Speaking of pre-turbo exhaust, you will need a tune for headers though.

  4. #3
    Registered User
    Join Date
    Jul 2008
    Location
    sussex county, new jersey
    Posts
    47
    I read the entire thread and everyone said no tune is necessary except for this guy:

    Quote Originally Posted by SeattleJeremy View Post
    A Catless uppipe does not require a retune. However, it does require a resistor in the EGT connector. GrimmSpeed Up Pipe Install - YouTube

    An aftermarket downpipe does need a retune.
    With 02 WRX's some people have had success without a tune, but the results will be better with a tune.
    03+ WRX's require a tune.
    I found this on the 8th page. He says 03+ require a tune, I have an 04. This is what confuses me

  5. #4
    Registered User Obeisance's Avatar
    Join Date
    Apr 2012
    Location
    not Ann Arbor
    Posts
    328
    That says: an aftermarket downpipe on an 03+ wrx requires a retune...
    David - '05 WRX

  6. #5
    Registered User
    Join Date
    Jul 2008
    Location
    sussex county, new jersey
    Posts
    47
    hahaha oh man....Looks like Ill have to go back to first grade and learn basic reading skills again.

  7. #6
    Banned
    Join Date
    Aug 2008
    Location
    Davey Jones Locker
    Posts
    8,644
    I Support ClubWRX
    Install it, log it, then decide if you should make adjustments to your tune.

  8. #7
    Registered User wreckingball man's Avatar
    Join Date
    Jul 2012
    Location
    Rocky Top
    Posts
    2,324
    Quote Originally Posted by kord9 View Post
    I read the entire thread and everyone said no tune is necessary except for this guy:



    I found this on the 8th page. He says 03+ require a tune, I have an 04. This is what confuses me
    you obviously didnt read the whole thread. In the second paragraph of the very fist post, the author of the thread says, "The best part about these gains is that there is no tune required to see the benefits like with some other power modifications." EJ257 is a reputable tuner on this forum.

    Also, Drews advice would be what I would go with.

  9. #8
    Registered User
    Join Date
    Jul 2008
    Location
    sussex county, new jersey
    Posts
    47
    Quote Originally Posted by Drews View Post
    Install it, log it, then decide if you should make adjustments to your tune.
    What do you mean by log it?

    @wreckingball man:
    I did read that post, I was not aware though that he is a reputable tuner. Anytime I see a post by EJ257 ill definitely be sure to take his word for it then. Thanks a lot for clearing it up for me though. It definitely helped me in my decision on installing an uppipe! Come next week I will be ordering and Invidia Uppipe with gaskets ready to install!

  10. #9
    Banned
    Join Date
    Aug 2008
    Location
    Davey Jones Locker
    Posts
    8,644
    I Support ClubWRX
    Quote Originally Posted by kord9 View Post
    What do you mean by log it?
    I mean, hook up a cable and do a data long.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •