stock boost on WRX?

Discussion in 'Modifications & DIY how-to' started by mckenzietj, Feb 21, 2007.

  1. mckenzietj

    mckenzietj Member

    I am in the process of putting some stuff back to stock for this week ends mods. One thing is the stock boost solenoid and hoses. I've had the TXS controller so long I lost the stock hoses and restrictor. Today I put in a line from the solenoid to a .040" restictor, then a "T" that goes to the turbo outlet and the wastegate. The car feels like it has the same power as other stockers (there are a few I see at work regularly) but it only hits about 9 psi. I do have an STi top mount, could that be the cause of the loss, or are my hoses and restrictor plumbed incorrectly? It's been a long time since I took them off.
     
  2. kevingroover

    kevingroover Member

    sounds wrong
     
  3. Deke

    Deke Active Member

    Well stock I'm pretty sure they only hit 9-10 psi in 1st and 2nd. But I think it's more like 12-14 in the other gears.
     
  4. sorry to change the subject but whats the PSI that a stg 2 shpuld hit in 1st?
     
  5. goixiz

    goixiz Active Member

    turbo outlet - restrictor - "T"

    T (straight leg) to WG actuator
    T (branch leg) to Boost solenoid -- Intake hose for turbo (this hose is larger)
     
  6. mckenzietj

    mckenzietj Member

    Thank you goixiz. So I got the T and restrictor reversed. I'll retest it in the morning.
     
  7. GTscoob

    GTscoob Black is Beautiful

    Should be around 14psi.
     
  8. goixiz

    goixiz Active Member

    welcome
    what you did was restrict the bleed line to the BCS therefore all(almost all) your flow is to the WG actuator opening the WG - hence WG boost
     
  9. kingwrex

    kingwrex Supporting Member

    stock is 13.5 psi i thought?
     
  10. mckenzietj

    mckenzietj Member

    I wasn't thinking of how it works, just how I remembered it being. Memory is the first thing to go when you get old I guess.
     
  11. goixiz

    goixiz Active Member

    the gas pedal is on the right (that all you need to remember) :)
     
  12. so how much boost should a stg 2 hit in 1st? WOT?
     

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