15 WRX overboosting, stock.
Results 1 to 7 of 7

This is a discussion on 15 WRX overboosting, stock. within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey guys, this is my first subaru and i have noticed that it is over boosting up to between 21.2-22psi ...

  1. #1
    Registered User
    Join Date
    Jun 2014
    Posts
    30

    15 WRX overboosting, stock.

    Hey guys, this is my first subaru and i have noticed that it is over boosting up to between 21.2-22psi on the boost gauge, factory say the max boost should be 15.9psi if i remember correctly. Can someone tell me if this is normal? Or is the gauge just overstating the boost? My dealer couldnt answer the question :/. Thanks.

    Also does humidity/rainy weather affect max boost as well? Or does it not matter?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    zax
    zax is offline
    \_(ツ)_/ zax's Avatar
    Join Date
    Nov 2008
    Location
    Neverland Ranch, Maryland
    Posts
    12,816
    I Support ClubWRX I Support ClubWRX
    Both the 2015 WRX and STi seem to exhibit boost spiking from the factory. A lot of preliminary logs suggest that this is not a concern at the moment.
    2015 CWP WRX STi ... But how did I get roped back into an EJ motor?!
    Zax's utterly unimaginably stock 2015 STi build thread
    Zax's Shaggin' Wagon Build Thread Now tuned for 99% pure Unicorn Jizz!

    Zach | Moderator -- Mid-Atlantic States, Tech & Modifying & General Repairs
    Rollin' with the Bugeye Mafia #302 | N.E.R.D. Subject Zero
    Facebook me here

    Your Mid-A local board: http://www.clubwrx.net/forums/mid-atlantic-states/

  4. #3
    Registered User
    Join Date
    Jun 2014
    Posts
    30
    That is good news. Thank you, i was about to start calling other dealerships. Thats over a 6psi discrepancy over factory specs.

  5. #4
    zax
    zax is offline
    \_(ツ)_/ zax's Avatar
    Join Date
    Nov 2008
    Location
    Neverland Ranch, Maryland
    Posts
    12,816
    I Support ClubWRX I Support ClubWRX
    Quote Originally Posted by Lockup1109 View Post
    That is good news. Thank you, i was about to start calling other dealerships. Thats over a 6psi discrepancy over factory specs.
    There is a check valve (reed or schrader valve) in the IM of the WRX that disallows manifold pressures above 22 PSI.
    2015 CWP WRX STi ... But how did I get roped back into an EJ motor?!
    Zax's utterly unimaginably stock 2015 STi build thread
    Zax's Shaggin' Wagon Build Thread Now tuned for 99% pure Unicorn Jizz!

    Zach | Moderator -- Mid-Atlantic States, Tech & Modifying & General Repairs
    Rollin' with the Bugeye Mafia #302 | N.E.R.D. Subject Zero
    Facebook me here

    Your Mid-A local board: http://www.clubwrx.net/forums/mid-atlantic-states/

  6. #5
    Registered User Aggie Subaru's Avatar
    Join Date
    Sep 2012
    Location
    San Marcos, TX
    Posts
    81
    My max boost so far is 21.0

  7. #6
    Registered User
    Join Date
    Jun 2014
    Posts
    21
    I've seen it up to 22.6. I've made a thread asking the same question at nasioc yesterday. I was told that its not an issue and it only happens for a short time before the boost goes back down to where its suppose to be. But IDK. I feel like its so common that Subaru would of known about it a LONG time ago now. Before these cars were even sold to the public. But that's just my guess. IDK how the whole car making process works.

  8. #7
    Registered User Goose42's Avatar
    Join Date
    Jun 2014
    Location
    Portland, Oregon
    Posts
    205
    Quote Originally Posted by zax View Post
    Both the 2015 WRX and STi seem to exhibit boost spiking from the factory. A lot of preliminary logs suggest that this is not a concern at the moment.

    This! Simply boost spike.
    Drive like hell, you will get there faster!

    Warranty friendly mods for now-
    http://www.clubwrx.net/forums/builds...ml#post3579257

Posting Permissions

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