Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

psi for stock turbo

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Old Nov 6, 2003 | 02:13 PM
  #2  
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From: Longing for my ol' white '02 WRX :(
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factory boost controller is set to ~ 14.2psi
stock turbo efficiency peaks at ~15.5
ECU cutoff is around ~17.5psi

physical limit? I've heard that the td04l13g can physically push as much as 21psi... but that about 5psi of useless, heatsoaked charge. I have no idea how true this 21psi thing is. Just something I've heard.


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Old Nov 6, 2003 | 02:27 PM
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no
don't put it over 15.5 if you want your turbo and engine to be used ever again
Old Nov 6, 2003 | 02:31 PM
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yes
Old Nov 7, 2003 | 12:20 PM
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From: Longing for my ol' white '02 WRX :(
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Exclamation

First off, I have an uppipe, which brings EGTs down a bit. I also try to run at least 93 octane whenever possible (adding toluene or xylene). With that said...

I have my EBC limiter set to 16.0. I set my EBC boost control with the intention of hitting 15.5 most of the time. At higher gears (more load) I'll hit 16.0 more often. But I'm usually on the street, so this isn't happening all the time.

Do this in steps. First set your limit to 15.0, then 15.5, and then if all seems very well, inch it up 0.1 at a time towards 16.0. Listen hard for pinging and feeling for pulled timing. Once you think you have a good and safe setting, try resetting your ECU and going back to stock boost. If your car suddenly feels faster at lower boost, you might have gone to far. At that point start over, go slower and more conservatively.

jason
Old Nov 7, 2003 | 12:21 PM
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From: Longing for my ol' white '02 WRX :(
Car Info: 2016 Acura RDX ... meh. Um, nice subwoofer?
Er and this is really hard to do with an MBC... get an EBC that records peak boost if you really want to raise boost properly. My recommendation: Blitz DSCB Spec-R. Best price and great service? http://www.gruppe-s.com


jason
Old Nov 12, 2003 | 12:07 AM
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There are many factors involved here, and its never a linear relationship (at least when in the reality of testing on a dyno). When figuring things off the top of my head for the sake of a conversation, I usually estimate at 10whp per psi... take it for what its worth... very little.

jason
Old Nov 12, 2003 | 02:34 AM
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Without supporting mods, taking the stock turbo beyond~16psi is a dangerous waste of time. If you don't know what you are doing, learning the hard way may end up being very expensive.
There are many here who have learned the hard way with their transmissions.
Make haste slowly. It's much cheaper that way.
Old Nov 26, 2003 | 09:45 AM
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keep it @ 15.5.....



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