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Old 07-29-2020, 09:20 AM   #1
JakeHovarter
Scooby Newbie
 
Member#: 498308
Join Date: Feb 2019
Default 2011 sti only making 10psi after engine rebuild

So I recently rebuilt my 2011 sti after going stage 2 external after spinning a bearing new short block was installed and many new hoses and lines also installed Iím only hitting 9-10 psi in S# have tried OTS 93 map from access port and that didnít change anything boost wise. Iíve done a boost leak test and no leaks I have a decent size waste gate crack running the oem boost control solenoid but no codes are thrown to show itís bad Iím a little lost and would like to see if anyone has any other thoughts on this issue I was making full boost before the rebuild with a boost leak and now no boost leak and I have an issue halp plz
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Old 07-29-2020, 03:49 PM   #2
Jedi03
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Member#: 491095
Join Date: Sep 2018
Chapter/Region: SWIC
Location: New Mexico
Vehicle:
2009 STi Blue
Blue

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how many miles on block now? if its not broken in rings may not be sealing completely yet
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Old 07-30-2020, 03:58 PM   #3
cknowlen
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Member#: 189077
Join Date: Sep 2008
Chapter/Region: NESIC
Location: Connecticut
Vehicle:
2011 STI limited
WRB

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First off: Punctuation man! That run on sentence was absolutely terrible to read.

Second: I am honestly not sure if the 2011 still uses the restrictor pill (which is sad because I also own a 2011)...but if you replaced "many new hoses" it is quite possible this vac line was replaced and a now "pill-less" line is in its place....read more here:
https://cobbtuning.atlassian.net/wik...l+System+Works
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Old 08-01-2020, 01:11 AM   #4
Jonikopsuka
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Member#: 515863
Join Date: Jun 2020
Location: Kymenlaakso province, Finland
Vehicle:
1997 Legacy GL
2 tone, turquoise-green

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I have no idea what kind of boost you should be making but could it be that your wastegate spring is only rated for that ~10 psi. If there are no leaks that's the next thing I'd check.

If the spring is rated for more and is in good condition, could it possibly be that your turbo doesn't flow enough air. I know that's really unlikely but better to know for sure.
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Old 08-01-2020, 01:15 AM   #5
Jonikopsuka
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Member#: 515863
Join Date: Jun 2020
Location: Kymenlaakso province, Finland
Vehicle:
1997 Legacy GL
2 tone, turquoise-green

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Quote:
Originally Posted by Jonikopsuka View Post
I have no idea what kind of boost you should be making but could it be that your wastegate spring is only rated for that ~10 psi. If there are no leaks that's the next thing I'd check.

If the spring is rated for more and is in good condition, could it possibly be that your turbo doesn't flow enough air. I know that's really unlikely but better to know for sure.
Ok so scratch the second part
A quick Google tells me you should get 14+ psi
I personally would check the spring to see if it's gone bad.
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