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Old 12-23-2010, 04:26 AM   #1
ryanx
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Default only getting 8.7 psi after uppipe/ downpipe install

New problem: only Hitting 8.x psi on ots Cobb stage 2
The shop that installed it said one of the vacuum lines snapped and they replaced it
After Christmas I'm going to get all the vacuum lines replaced with brand new ones and see if that solves the problem
If not what else might the problem be?
It was reaching peak boost perfectly before the install on a stage 1 tune

edit:had vacuum lines replaced and it didnt fix the problem





Old problem:solved
ok so today i had my new perrin uppipe and cobb catted downpipe installed at a shop and i had all new gaskets for them except for the donut gasket which i told the shop to just use the one already on the car
they said sure that wouldnt be a problem
when they finished my car they said that my downpipe wasnt sealing with my midpipe correctly or something and there was a leak
and its loud and sounds like crap
they said i needed a donut to flat flange adapter?
anyways when i got home and took my stock pipes out of my truck i noticed the donut gasket was still on the stock downpipe -_-
when i emailed the shop they responded with "that one doesnt work that well bro"
i emailed them back asking if they put a different one on but didnt get a response, which is understandable because it was after they closed
do you guys think that they really could have not even put a gasket on at all between the downpipe and the mid pipe?
how hard would it be to just put in the donut gasket myself?
and how bad is it to drive the car without it?
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Last edited by ryanx; 12-31-2010 at 02:36 PM.
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Old 12-23-2010, 06:31 AM   #2
03STAGE2
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I have the oem donut on my cobb catted down and it fits without any leaks. It is just two spring bolts and you can put it on yourself. You can do it with ramps if you have a set. Should take you thirty min. What are you using for your catback?
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Old 12-23-2010, 10:00 AM   #3
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Not trying to be a dick here, but a little reading goes a LONG way.
There are FAQs that answer a lot of the questions you will have, and keep you from making mistakes like this.

Most aftermarket downpipes use a flat 2-bolt 3" flange, while the factory catback (and some aftermarket) use a donut gasket to allow for a 'flexible' joint so that there isn't a lot of stress on the turbo or entire exhaust when the turbo torques. A flat 2-bolt flange doesn't mate to the donut gasket joint flange, and you will have fitment issues and an exhaust leak. You can either buy a 2-bolt 3" flange and have it welded in, or you can buy an adaptor to work.

The adaptor you are looking for is similar to this:
http://www.maperformance.com/cnt-rac...11400-wrx.html

You will also want to check out the FAQs and the Search function next time before you decide to do anything else, trust me, it will help out in the long run.
http://forums.nasioc.com/forums/show....php?t=1169980
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Old 12-23-2010, 10:54 AM   #4
ryanx
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Yeah that's what I though
I just couldn't believe a shop that claims to specialize in subies overlooked something like that

And not to be a dick or anything
But I did
The Cobb downpipe tapers to 2.5 inches after the cat so it can hook up to the stock midpipe with no problems
I assumed that was common knowledge
My bad
And yeah I've read all of the "hey read this first!!!" threads and rules and such
I'm not new to online communities in general and though I am relatively new here, despite my low post count, I have been reading a lot of stuff on here and I understand how easily it is to ask a question get just get a reply that says "search for it" or "read the sticky"
I couldn't find any threads about a shop forgetting to put on a gasket during an install and I wanted to know if anyone thought this could actually be the case
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Old 12-23-2010, 11:14 AM   #5
xveganxcowboyx
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Disconnecting the two pipes is very easy. Jack it up and take a look. I just put a new stock donut gasket between my HKS downpipe and STI cat back. It sealed well and has no leaks.
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Old 12-23-2010, 11:28 AM   #6
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I used 2 gaskets from Autozone.

A stock 2.5 inch donut gasket and a 3inch flange gasket. slapped 'em together and it works perfect. cost about 20ish.

Might try something similar mating a donut and a flange gasket. I had to take all the hangers off to get the exhaust system to line up right but was an easy fix to an exhaust leak that sounded horrid
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Old 12-23-2010, 12:06 PM   #7
03STAGE2
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12345

Last edited by 03STAGE2; 12-23-2010 at 12:22 PM. Reason: Had to figure out the right way to embarass W.H.O.
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Old 12-23-2010, 12:20 PM   #8
03STAGE2
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Quote:
Originally Posted by WhyHelloOfficer View Post
Not trying to be a dick here, but a little reading goes a LONG way.
There are FAQs that answer a lot of the questions you will have, and keep you from making mistakes like this.
Then I suggest you read them because your information is wrong.

Quote:
Originally Posted by WhyHelloOfficer View Post
Most aftermarket downpipes
Let me stop you right there.... He is not putting on MOST catbacks. He is putting on a Cobb catback. I suggest you read up on them. It will save you the time in the future from typing out posts that contain bad information.

Quote:
Originally Posted by WhyHelloOfficer View Post
The adaptor you are looking for is similar to this:
http://www.maperformance.com/cnt-rac...11400-wrx.html
FAIL! FAIL! FAIL! Absolutely wrong. No piece needed.

Quote:
Originally Posted by WhyHelloOfficer View Post
You will also want to check out the FAQs and the Search function next time before you decide to do anything else, trust me, it will help out in the long run.
http://forums.nasioc.com/forums/show....php?t=1169980
WhyHelloOfficer, You will also want to check out your facts versus the FAQ's before you post a bunch of junk and end up looking like a joke. Trust me, it will help out in the long run. Douche bag.
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Old 12-23-2010, 03:03 PM   #9
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OP, if you're feelin ballsy you can take a file and SLIGHTLY bevel the inside of the cbe flange so it will fit around the donut. what cbe are you using?
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Old 12-23-2010, 03:04 PM   #10
ryanx
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Thanks for the help guys
And I fixed it kinda
I couldn't get the old donut gasket completely on the new downpipe because it was really tight (I think thats kinda the point) but I got it on somewhat and tightened both bolts as tight as they would go
It sounds sooooo much better
Haven't taken it on a pull or anything yet but idling and revving sound infinitely better
Even If it isn't completely fixed, it good enough for me at least for not
I'm going to buy a new gasket soon and then I'll see if I can get it on better
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Old 12-24-2010, 01:15 AM   #11
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Ok so
From what I can tell, the exhaust leak is gone
Unfortunately after flashing to stage 2 (I flashed right after the install before driving it) I haven't been able to hit target boost
The highest it's been is 8.8 psi at wot in 3rd gear
I don't exactly remember what target boost for the ots stage 2 map from Cobb is but I'm pretty sure its about double what I'm currently getting...
The shop that did the install said a vacuum line snapped and they replaced it for free
I'm pretty sure they said it was for the bcs
I know "pretty sure" isn't ideal but it's all I have :/
anyways
Since they seemed to forget to put on the donut gasket, do you think its possibly they forgot to replace the line?
And if they did replace the line what might my problem be?

Edit:
Before the install I was reaching target boost on stage1
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Old 12-24-2010, 05:43 AM   #12
03STAGE2
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LOL... Nice PM WhyHello. I should post it up to show how much of a douche you really are. You tried to flame a member without knowing anything about one of the most popular exhaust systems and failed. To be honest, it did make me feel great to smack you down off your "I am a subaru thread genius" cloud.

OP... Sounds like you are running at waste gate spring pressure. You are going to have to check the hoses and see if they damaged more than they let on. They may have put a hose on that is not the same id and it is not sealing. Also try to flash back to stage 1 and see if you get more than 8psi. My guess is that you will not and then you know its a leak.

See how easy that was WhyHello? Owning a subaru is like joining a family. Dont be a dick and help your brother out.
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Old 12-24-2010, 07:21 AM   #13
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Quote:
Originally Posted by 03STAGE2 View Post
To be honest, it did make me feel great to smack you down off your "I am a subaru thread genius" cloud.
It felt good to watch (read). There's so much false information promotion going around (intentional or not), I just assume it's all false until proven otherwise. Like wikipedia. Glad to see at least some people are policing the ass-hats.
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Old 12-24-2010, 11:59 AM   #14
ryanx
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Thanks guys
If there was a problem with the hose wouldn't i be overboosting instead of underboosting?
This problem is making me very sad
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Old 12-24-2010, 11:11 PM   #15
Ernest
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I just had the same issue. I used two 3 inch gaskets. So far so good. I have the donut gasket just in case. I did not like the fitment compared to two gaskets.
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Old 12-31-2010, 02:28 PM   #16
ryanx
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Update:
I got all the lines replaced and I'm still not getting boost past 8.7 psi
I'm gonna try ordering a new restrictor pill because I don't think there is one in there now
I really hope that works
I'm starting to lose hope in ever feeling full boost again
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Old 12-31-2010, 03:07 PM   #17
bugeyegrocerygettr
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Quote:
Originally Posted by ryanx View Post
Update:
I got all the lines replaced and I'm still not getting boost past 8.7 psi
I'm gonna try ordering a new restrictor pill because I don't think there is one in there now
I really hope that works
I'm starting to lose hope in ever feeling full boost again
I feel your pain.....im having misfire problems everytime i get near 10psi it normally runs at 15psi. So ive been having to drive it without hardly getting out of vaccuum because it is my only car i have no choice but to ***** foot it everywhere.
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Old 12-31-2010, 03:08 PM   #18
wrxBRAH
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There is a possibility that your boost solenoid crapped out or the flash is bad. Try flashing back to stock stage1 and see what kind of boost numbers you get. Also if you have a friend with a suby, swap out the boost solenoid and see if that fixes the boost issues.

Only two things I can think of atm.

When I had a cobb, I noticed it was very picky about battery voltage being above a certain number so whenever I flashed, I always made sure I had an extra battery attached as well.
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Old 12-31-2010, 03:14 PM   #19
ryanx
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Quote:
Originally Posted by bugeyegrocerygettr View Post
I feel your pain.....im having misfire problems everytime i get near 10psi it normally runs at 15psi. So ive been having to drive it without hardly getting out of vaccuum because it is my only car i have no choice but to ***** foot it everywhere.
car troubles are the worst

Quote:
Originally Posted by wrxBRAH View Post
There is a possibility that your boost solenoid crapped out or the flash is bad. Try flashing back to stock stage1 and see what kind of boost numbers you get. Also if you have a friend with a suby, swap out the boost solenoid and see if that fixes the boost issues.

Only two things I can think of atm.
i already tried flashing to stage 1 and stock and it was the same thing
how much is a new oem solenoid?
and maybe im miss understanding the function of the bcs but isnt it there to limit the boost? so if it went out my boost would be through the roof?

i think im going to try taking it to the dealership and see if they can fix it
i dont care if they will charge more than my usual mechanic at this point

my usual mechanic is a honda/ acura specialist and i really dont like taking my subaru there
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Old 12-31-2010, 03:57 PM   #20
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Its about 30$ used, not sure what it is new. Like I said if you have a friend with a suby, its very easy to swap out to see if thats the problem.

Since the problem happened after/during the work they were doing, is it possible to take it back to the shop and have them smoke test to make sure you dont have a rip in your inlet or any other hoses leaking?
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Old 12-31-2010, 04:36 PM   #21
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Quote:
Originally Posted by 03STAGE2
LOL... Nice PM WhyHello. I should post it up to show how much of a douche you really are. You tried to flame a member without knowing anything about one of the most popular exhaust systems and failed. To be honest, it did make me feel great to smack you down off your "I am a subaru thread genius" cloud.

OP... Sounds like you are running at waste gate spring pressure. You are going to have to check the hoses and see if they damaged more than they let on. They may have put a hose on that is not the same id and it is not sealing. Also try to flash back to stage 1 and see if you get more than 8psi. My guess is that you will not and then you know its a leak.

See how easy that was WhyHello? Owning a subaru is like joining a family. Dont be a dick and help your brother out.
That is exactly what I was thinking with wastegate pressure. Check by grabbing the wasteate and push it open and close to make sure it's not catching on anything they are known to do so quite often. If that doesn't fix it make sure your vacuum line to the wastegate is tight and not leaking.

If someone asks a question help them out not tell them to search for it. If you know the answer say it, if not don't say anything so the OP doesn't get clogged up with garbage and fighting. This is a learning and helpful forum not let's be a dick forum.
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Old 01-01-2011, 03:22 PM   #22
ryanx
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how do i push the wastegate open and closed?
i feel like its a really obvious answer but when i checked out my wastegate actuator and everything it was attached to, nothing seemed to budge
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Old 01-01-2011, 04:10 PM   #23
Alwayz_Spoolin
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Quote:
Originally Posted by ryanx View Post
how do i push the wastegate open and closed?
i feel like its a really obvious answer but when i checked out my wastegate actuator and everything it was attached to, nothing seemed to budge

You can see if the wastegate will open or not , by taking the wastegate arm off the flapper door arm . Theirs a little "C" clipe that holds the waste gate arm onto the flapper door arm. Pull "C" clip off with some needle nose plyers and pop the waste gate arm off of the flapper door arm. You can then push/pull the waste gate arm to see if it moves or not and also check to see if the flapper door is opening as well.
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Old 01-01-2011, 04:27 PM   #24
blue03_wrx
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^^^ exactly, you should be able to hear it open and close each time to know it's functioning properly.
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Old 01-01-2011, 04:46 PM   #25
Alwayz_Spoolin
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Yea , also pull the vacuum line off the waste gate and when your pushing/pulling on the wastegate arm , you can hear/feel air come out or being sucked in.
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