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  1. Engine Modifications
    Hey guys! So I picked up an EJ205 from a 2003 WRX on FB Marketplace and I needed a few parts before I swap it into my Forester (EJ253). My questions are: Would there be issues with using the 253 ECU and/or bulkhead wiring harness with the 205? Is a 2002 WRX ECU (ECU Sticker Label "V2")...
  2. Engine Modifications
    I have a 2002 wrx with the stock td04. I recently discovered that one of the downpipe to turbo studs on the turbine housing was stripped out and repaired incorrectly sometime in the past. The stud does not line up correctly with the downpipe gasket and creates a really bad exhaust leak. I...
  3. General Maintenance, Troubleshooting & Accidents.
    hey everyone! first post here and i’m really hoping we can get this figured out. working with my 2016 wrx limited with tgv egr delete, downpipe and boost controller it has a new professionally installed iag stage 2 block. for around 100k miles i was running a bren dyno tune, it was...
  4. Engine Modifications
    Hello all!, I’m very new to subie, I have a 2016 wrx with an MAF engine system. I’ve read that BOV’s mess with your computers communication if you’re running a MAF (mass airflow sensor) system. Is a diverter valve the same? I’ve read not having an escape for pressure isn’t good for the wrx...
  5. Transmission & AWD
    My 2004 wrx has been at the shop waiting to get tuned for the past week. They got it on the dyno and the car made a whopping 2 lb of boost. Some context on the car: jdm ej205 avcs drive by cable, jdm v8 sti ecu, avcs wired in, no boost leaks smoke test and pressure tests didn’t show anything...
  6. Tuning: Electronic Engine Management
    My 2004 wrx has been at the shop waiting to get tuned for the past week. They got it on the dyno and the car made a whopping 2 lb of boost. Some context on the car: jdm ej205 avcs drive by cable, jdm v8 sti ecu, avcs wired in, no boost leaks smoke test and pressure tests didn’t show anything...
  7. General Maintenance, Troubleshooting & Accidents.
    My battery died recently and since then my turbo timer stopped working. When I changed the battery for a brand new one, the turbo timer still did not work... In addition, since my turbo timer stopped working, my remote starter also stopped working. I don't really care if the turbo timer doesn't...
  8. Engine Modifications
    I have a 2005 wrx, bought it used a few months ago and been working my way through it to figure it out. I've realized that the turbo seals need replacing but not sure how to identify this turbo. The previous owner said its a 20g turbo and was tuned for a 20g. There are no markings on it, has...
  9. Engine Modifications
    hey guys i im looking for advice on a upgraded turbo capable of making 500whp in my 09 sti ive got a faily new iag closed deck short block, stock heads, 1050 id injectors, aem 320 lph 65mm,fuel pump cobb fpr, iag aos, act street act strip clutch, iag tgv deletes, apr headstuds catless downpipe...
  10. Engine Modifications
    Hey guys I’m buying an sti here shortly. I want to upgrade pretty fast and barely know the basics. I have done some reasearch. I’d like to get to 400hp pretty quick. Eventually 600. Can anyone kind of point me in the right direction? Here’s a list of the mods I plan on getting right away: Cobb...
  11. Engine Performance
    Hi Guys! I have an 06 WRX current mods: Blow off valve, high flow catted DP, Catback exhaust and a tune I have the current parts to install: Blouch 1.5xtr turbo Process West TMIC Process West CAI 1050ID injectors 255L fuel pump TGV deletes Perrin Turbo Inlet IAG AOS 3 Port boost...
  12. Engine Modifications
    Is there a difference between a blow off valve and a bypass valve? If there is what is it and what’s better?
  13. General Maintenance, Troubleshooting & Accidents.
    My 2017 sti is bone stock and my daily driver. Recently at about 65k miles i noticed stuttering and jerking at WOT above 4.5k rpm. I then replaced my spark plugs with oem NGK plugs (my old plugs turned white instead of black) and that didnt help. During the hesitation the check engine light...
  14. Engine Modifications
    best stock location turbo for 400/500hp and anything else I’ll have to do. On a 2000 wrx sti gdb. The modifications on my car so far are 725cc injectors, methanol injection Perrin catless down pipe, process west tmic, amr c7 turbo, intake and fuel pump I can’t remember off hand it was tuned on...
  15. General Maintenance, Troubleshooting & Accidents.
    Hello all, I am extremely new to the Subaru world. I have always loved these cars since I first seen it in 2004. I just recently purchased a 2004 WRX Impreza Wagon. It's not perfect, definitely will need some love which I intend on doing. I just had this recent issue come up. When starting the...
  16. Engine Performance
    I have a 2018 WRX premium with 49k miles. I was looking into Turbo blankets and header wraps and was wondering if they’re actually effective and give results? And if so is a tune necessary for it? They claim it spoils the turbo quicker, while keeping the engine bay cooler, and heat soak to a...
  17. Engine Modifications
    Hello, Just bought a 2007 Subaru WRX TR and new to the turbo world. The car has around 167,XXX miles. Some mods that I can name out is Cobb Accessport v3, Stage 2 I believe, new installed OEM Exedy clutch and flywheel with less than 1k miles on them, Turbo XS boost controller, HKS Blowoff...
  18. General Maintenance, Troubleshooting & Accidents.
    First time suby owner please help! I have a 2017 wrx base that runs fine, although lately its devoloped a Minor oil leak around the turbo, see pic. I think its the oil return line? At least thats what i think the technician said. Theres a small plastic clip/coupler that attaches the metal line...
  19. Engine Modifications
    Alright my name's Ben and I'm new here so cut me some slack with this. I have a 2004 wrx, not an sti, and I am trying to do a turbo upgrade. I have been looking at a vf39 or a vf48(that's the 2018+ sti turbo correct me if I'm wrong). I am wondering which I should go for. Or if I should just save...
  20. General Maintenance, Troubleshooting & Accidents.
    Hey all, I am new to this forum site. I have heard good things about this site as my friends have had lots of help here. My stock 17 WRX 6spd MT just started having a strange issue. Intermittently, it will just start building peak boost at low throttle input in 2nd and 3rd gear. It doesn’t...
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