CAI Questions HELP!!!!******
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This is a discussion on CAI Questions HELP!!!!****** within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; jUst have a couple questions regarding my 14 wrx. right now I'm on stage 2 using the Cobb accessport . ...

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    CAI Questions HELP!!!!******

    jUst have a couple questions regarding my 14 wrx. right now I'm on stage 2 using the Cobb accessport . I have a invidia catted downpipe and a Perrin cat back exhaust currently on the car. I had a aem cold air intake on it And used Cobbs Stage2+AEM map but I ran into over boosting and hit a fuel cut due to the CAI so I took it off and referred back to my stock intake but I want to put the CAI back on because I was getting more power that way. But I've read that I would keep over boosting and have boost creep (due to the cold weather) if I don't leave it off and keep the stock intake or would have to get an external wastgate, but I rather not because I've heard that those are ridiculously loud. Now my question being is that, would I be able to get a pro-tune or another way that would help manage boost control better to basically not have the possibility of over boosting or boost creep so that I can attach my cold air intake back on my car?. I've been on forum after forum and I couldn't find a straight answer for my questions . As you could tell I'm new at the subie game so please reframe from the harsh comments, I'm just trying to figure this whole thing out & learn more, thanks!!
    Last edited by wrxzeek; 10-21-2014 at 06:00 PM.

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    He simply abides. SD_GR's Avatar
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    If your current map does not support the intake you cannot use the intake with your current map. Period.

    If you insist on using the intake you must find a map that supports it, or have someone generate one. Consider either a local vendor that can reflash your car or a remote, email-based map solution.
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    Quote Originally Posted by SD_GR View Post
    If your current map does not support the intake you cannot use the intake with your current map. Period.

    If you insist on using the intake you must find a map that supports it, or have someone generate one. Consider either a local vendor that can reflash your car or a remote, email-based map solution.
    I've used Cobb's Stage2+AEM and over boosted, that's when i reverted back to stock intake . Should've said that in the actual post .

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    Quote Originally Posted by wrxzeek View Post
    I've used Cobb's Stage2+AEM and over boosted, that's when i reverted back to stock intake . Should've said that in the actual post .
    If you have the ability to log data consider sending those data to Cobb and asking for help.
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    Registered User nsibanez's Avatar
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    That's the problem with GR models. You are going to experience over boost. If you want to keep the intake on I'd try putting the stock catback on and getting more back pressure. You cannot tune out boost creep. Either that or port the wastegate or go external. You can set the external to dump back into the exhaust to keep it quieter. Most people who go external though want that loud sound so you may not find videos for it
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    Village Idiot McBill's Avatar
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    Quote Originally Posted by nsibanez View Post
    That's the problem with GR models. You are going to experience over boost. If you want to keep the intake on I'd try putting the stock catback on and getting more back pressure. You cannot tune out boost creep. Either that or port the wastegate or go external. You can set the external to dump back into the exhaust to keep it quieter. Most people who go external though want that loud sound so you may not find videos for it
    Wrong, He should not be experiencing any boost creep with the catted downpipe what so ever... the EJ255's and EJ257's sometimes experience boost creep with catless downpipes.

    OP, you need to reinstall everything (so make sure your AEM CAI is installed as well as your aftermarket catted downpipe) reflash your stage 2+AEM map and data log the boost creep then send it to COBB as there is obviously some sort of issue with the MAP you are running. This MAP should not have significant boost creep with catted downpipe.

    On a side note, what kind of peak boosts were you seeing?
    Last edited by McBill; 10-22-2014 at 09:13 AM.
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    OMG WTF MainFrame's Avatar
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    Did you have boost creep, or did it over boost at the onset? Creep cannot be tuned out, overboost can, rather easily.

    As far as not wanting an EWG, they really are that much better. It will only be loud when you floor the car and it hits max boost.. don't want it to ever be loud (probably shouldn't be flooring it on the street anyways)? Then just plumb the dump tube back into the exhaust down stream. There's no reason you would HAVE to dump to atmosphere.. in fact, several exhaust setups already come with it routed back in (like Perrin).

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    The Guy On The Couch TownLine500's Avatar
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    When I first had my car Protuned, it over boosted a little bit.
    This happens, without any creep. I asked tuner to adjust map.
    No more over boosting by 2-3 psi. I have a stage2 setup, no boost creep at all with catted down pipe.
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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by TownLine500 View Post
    When I first had my car Protuned, it over boosted a little bit.
    This happens, without any creep. I asked tuner to adjust map.
    No more over boosting by 2-3 psi. I have a stage2 setup, no boost creep at all with catted down pipe.

    Exactly.. if it's over shooting target boost at onset (like if you floor it at 2500rpm in 4th, turbo spools->spikes->fuel cut) all you should need to do is dial back WGDC a little in that part of the map.

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    Quote Originally Posted by MainFrame View Post
    Did you have boost creep, or did it over boost at the onset? Creep cannot be tuned out, overboost can, rather easily.

    As far as not wanting an EWG, they really are that much better. It will only be loud when you floor the car and it hits max boost.. don't want it to ever be loud (probably shouldn't be flooring it on the street anyways)? Then just plumb the dump tube back into the exhaust down stream. There's no reason you would HAVE to dump to atmosphere.. in fact, several exhaust setups already come with it routed back in (like Perrin).
    Honestly I think I just over boosted . But alot of the other forums I've read was mentioning Boost creep so I figured that boost creep comes along with having a CAI so I could be mistaken, my bad if I am.

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    Quote Originally Posted by McBill View Post
    Quote Originally Posted by nsibanez View Post
    That's the problem with GR models. You are going to experience over boost. If you want to keep the intake on I'd try putting the stock catback on and getting more back pressure. You cannot tune out boost creep. Either that or port the wastegate or go external. You can set the external to dump back into the exhaust to keep it quieter. Most people who go external though want that loud sound so you may not find videos for it
    Wrong, He should not be experiencing any boost creep with the catted downpipe what so ever... the EJ255's and EJ257's sometimes experience boost creep with catless downpipes.

    OP, you need to reinstall everything (so make sure your AEM CAI is installed as well as your aftermarket catted downpipe) reflash your stage 2+AEM map and data log the boost creep then send it to COBB as there is obviously some sort of issue with the MAP you are running. This MAP should not have significant boost creep with catted downpipe.

    On a side note, what kind of peak boosts were you seeing?
    At the time i couldn't tell or log anything because I took out my accessport at the time & 1 of my friends wanted to run it on the highway real quick, I couldn't refuse lol .. and that's when I hit the fuel cut, I couldn't see the spike without the gauges of the accessport. :/

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    Registered User nsibanez's Avatar
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    Quote Originally Posted by McBill View Post
    Wrong, He should not be experiencing any boost creep with the catted downpipe what so ever... the EJ255's and EJ257's sometimes experience boost creep with catless downpipes.

    OP, you need to reinstall everything (so make sure your AEM CAI is installed as well as your aftermarket catted downpipe) reflash your stage 2+AEM map and data log the boost creep then send it to COBB as there is obviously some sort of issue with the MAP you are running. This MAP should not have significant boost creep with catted downpipe.

    On a side note, what kind of peak boosts were you seeing?
    No with higher flowing air even catted downpipes sometimes don't have enough back pressure and can allow for boost creep. Even cobb says that even with the k and n drop in could cause it
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    Registered User nsibanez's Avatar
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    Quote Originally Posted by wrxzeek View Post
    At the time i couldn't tell or log anything because I took out my accessport at the time & 1 of my friends wanted to run it on the highway real quick, I couldn't refuse lol .. and that's when I hit the fuel cut, I couldn't see the spike without the gauges of the accessport. :/
    To me that just sounds like an overboost. But do a log and post to better understand. You can also overboost without hitting fuel cut and throwing the light unfortunately
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    The Guy On The Couch TownLine500's Avatar
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    Run some logs see what your boost is at WOT in 3rd gear.
    You can also download the low waste gate map from Cobbs website.
    More than likely there's a slight over boost, and like Mainframe said over boost can be easily tuned out.
    We need to know what it's hitting at WOT.
    And what the max boost looks like, also remember this is plus or minus one.
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    Village Idiot McBill's Avatar
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    Quote Originally Posted by nsibanez View Post
    No with higher flowing air even catted downpipes sometimes don't have enough back pressure and can allow for boost creep. Even cobb says that even with the k and n drop in could cause it
    I've still never heard of any boost creep with a catted downpipe on the 2.5l's no matter the intake. However, I have heard and seen of some slight over boosting. Maybe you are mistaking boost creep for over boosting like OP has. It's a common misconception but I assure you the two terms have entirely different meanings.
    Last edited by McBill; 10-22-2014 at 01:18 PM. Reason: Grammar Nazied myself... again
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