2007 STI Limited Build thread.
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This is a discussion on 2007 STI Limited Build thread. within the Builds forums, part of the Tech & Modifying & General Repairs category; I thought I would start this today since I want to somewhat keep track what I've done, and its progress.. ...

  1. #1
    Registered User nosoupfoyou's Avatar
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    2007 STI Limited Build thread.

    I thought I would start this today since I want to somewhat keep track what I've done, and its progress..
    I'm looking for a safe DD that makes approx. 350 WHP and similar TQ numbers. Thats the goal

    2007 STI Limited
    65,000 currently

    Performance upgrades:
    -------------
    Cobb Turbo back exhaust
    SPT Intake
    Cobb Access Port V2 - 91 octane STG 2 tune currently

    Electronics:
    -------------
    DEFI Gauge's - Oil Pressure / Oil Temp / Water Temp
    Factory Boost gauge

    Future Plans:
    -------------
    1000 CC ID injectors
    Larger Walboro FP
    E85 + tune
    Increase boost on stock VF43

    As it currently sits, I am running a very aggressive tune, too aggressive according to Harvey, at the Boost Creep (previous owner setup). Currently my AFR is up in the 12:1 ratio at full boost (15 PSI). He wants it to be 11:1 or 10.8:1 So I am having to send my Cobb accessport in for a new firmware as it was un-update-able as Harvey told me. So as soon as I get this back from COBB I'll be making a new map for High altitude on 91 octane. He claims he can make much more TQ and I'll probably lose a tiny bit of peak HP than current. But I'll also be going E85 soon enough so that will be next maps to come.


    The dips in the HP and TQ were from too aggressive of a tune, resulting in the ECU changing timing to keep from detonation because of bad AFR. -Not Ideal right now. Better curves coming soon.



    Last edited by nosoupfoyou; 11-28-2011 at 11:28 PM.

    2007 UGM WRX STi - Limited 65k
    PSN : MileHiTattoo
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  3. #2
    Registered User nosoupfoyou's Avatar
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    2007 UGM WRX STi - Limited 65k
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    Moderator T0rque's Avatar
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    grimmspeed ported/coated manifolds
    Grimmspeed EBCS
    Blouch 1.5xtr
    DW 1,000cc
    processwest tmic

    you reached your goal


    Lead Wrench @ WTF Tuning, LLC

  5. #4
    Registered User nosoupfoyou's Avatar
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    My tuner seems to think I can get there on E85, injectors, FP, and good tune with more boost out of the VF43. I'd rather get the most out of the stock turbo before I go the replace the hair dryer route. I do probably need a new TMIC though, and processwest would be my 1st choice.

    2007 UGM WRX STi - Limited 65k
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    Moderator T0rque's Avatar
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    I had every bolt on possible at basic sea level and only achieved 307. PM Sinister, he is at 388 with the mods I mentioned in denver.


    Lead Wrench @ WTF Tuning, LLC

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    Moderator T0rque's Avatar
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    oh... on e85 btw.. good luck with the stock snail..


    Lead Wrench @ WTF Tuning, LLC

  8. #7
    Registered User nosoupfoyou's Avatar
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    Quote Originally Posted by T0rque View Post
    oh... on e85 btw.. good luck with the stock snail..
    I don't plan on it lasting forever thats for sure. But why not see what its capable of before replacing it?

    2007 UGM WRX STi - Limited 65k
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  9. #8
    Registered User nosoupfoyou's Avatar
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    COBB seemed fully capable of achieving exactly this idea...

    2007 UGM WRX STi - Limited 65k
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    Moderator T0rque's Avatar
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    its capable of 350 whp at about sea level..


    Lead Wrench @ WTF Tuning, LLC

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    Moderator T0rque's Avatar
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    Quote Originally Posted by nosoupfoyou View Post


    COBB seemed fully capable of achieving exactly this idea...
    Sure.. In plano, tx.. whats different?? 5,000 feet


    Lead Wrench @ WTF Tuning, LLC

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    Registered User nosoupfoyou's Avatar
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    I may be wrong here but, turbo engines should be able to achieve almost the same numbers as sea-level, it would just take a bit longer to get there (turbo spool lag)

    The turbo is setup to provide boost up to wastegate pressures. BUT the amount of boost is determined by the speed of the impeller ( driven by exhaust gas speed ) and the wastegate control.
    So turbos take longer to get the boost going and don't initially increase power at the same rate as at sea-level. ONCE the turbo is spinning fast enough and producing enough boost for the wastegate to want to blow some off THEN it is at the same power as sea level. So at higher alts they tend to be more laggy and more peaky. But the car should if I'm not mistaken make similar peak power as it would in TX.

    PSI is PSI regardless of location, yet it does take more thin air to create the equivalent sea-level pound. But the air level at that Pound of pressure is the same despite change in altitude.

    Please let me know if I'm off here.
    Last edited by nosoupfoyou; 11-29-2011 at 12:12 AM.

    2007 UGM WRX STi - Limited 65k
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  13. #12
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by nosoupfoyou
    COBB seemed fully capable of achieving exactly this idea...
    You can't compare them.

    Regardless of Denver vs Plano, you could have two dynos in either Denver or Plano 2 miles apart from each other that read differently by 50whp.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

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  14. #13
    Registered User nosoupfoyou's Avatar
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    Quote Originally Posted by EJ257 View Post
    You can't compare them.

    Regardless of Denver vs Plano, you could have two dynos in either Denver or Plano 2 miles apart from each other that read differently by 50whp.
    This is true. Its a target, nothing more... If I miss it then I'll change the plan at that point. It's an idea or a starting point, just enjoying the process.

    2007 UGM WRX STi - Limited 65k
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  15. #14
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by nosoupfoyou
    This is true. Its a target, nothing more... If I miss it then I'll change the plan at that point. It's an idea or a starting point, just enjoying the process.
    Quote Originally Posted by nosoupfoyou
    My tuner seems to think I can get there on E85, injectors, FP, and good tune with more boost out of the VF43.
    Harvey knows his dyno/work best. If he thinks you can do it safely, listen to him.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

    "Never trust anything that bleeds for a week and lives ..."

    UNYSOC

  16. #15
    Moderator T0rque's Avatar
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    Quote Originally Posted by nosoupfoyou View Post
    I may be wrong here but, turbo engines should be able to achieve almost the same numbers as sea-level, it would just take a bit longer to get there (turbo spool lag)

    The turbo is setup to provide boost up to wastegate pressures. BUT the amount of boost is determined by the speed of the impeller ( driven by exhaust gas speed ) and the wastegate control.
    So turbos take longer to get the boost going and don't initially increase power at the same rate as at sea-level. ONCE the turbo is spinning fast enough and producing enough boost for the wastegate to want to blow some off THEN it is at the same power as sea level. So at higher alts they tend to be more laggy and more peaky. But the car should if I'm not mistaken make similar peak power as it would in TX.

    PSI is PSI regardless of location, yet it does take more thin air to create the equivalent sea-level pound. But the air level at that Pound of pressure is the same despite change in altitude.

    Please let me know if I'm off here.
    good luck, lets see the build!


    Lead Wrench @ WTF Tuning, LLC

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