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bleed valve on 1.8t

Discussion in 'A3/S3 Forum (8L Chassis)' started by a3 turbp, Jan 22, 2007.

  1. a3 turbp
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    a3 turbp New Member

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    quick question, does anyone know if a bleedvalve will work on a 1.8t s aldon automotive said it would but im not sure
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  2. Secret Squirrel
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    Secret Squirrel Member

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    Please don't fit a bleed valve on your 1.8T.
    Go and get yourself an Escort RS Turbo if you want to do that sort of thing.
    A decent remap is the only way if you want more boost/power/torque IMO.
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  3. dubhyper
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    dubhyper Illegally Street

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    remaps may cost alittle(x20) more, but youll have all sorts of problems with a bleed valve..So no they are not suitable.. Unless anyone knows otherwise
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  4. Caesium
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    Caesium My BM is fixed!

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    I think bleed valves only work on cars that don't have electronic engine management. It may drive the ECU haywire.
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  5. a3 turbp
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    a3 turbp New Member

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    i thought that it would'nt work aswell but they reckon if i set it at 14 psi and have a remap it will be fine
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  6. dultanur
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    dultanur all promises, no action :)

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    daft question coming up: whats a bleed valve?
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  7. Caesium
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    Caesium My BM is fixed!

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    Between the compressor housing and the wastegate actuator is a small rubber pressure hose, when the turbo boost pressure reaches a pre-defined level it activates the actuator and opens the wastegate. The wastegate operates in such a way that it allows exhaust gases to bypass the turbine blades, therefore slowing the turbo and reducing boost.
    A bleed valve fits on the rubber hose between the actuator and compressor housing and bleeds some of the pressure out to the atmosphere thus reducing the amount of boost reaching the actuator, this allows higher turbo boost to be acheived.
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  8. Secret Squirrel
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    Secret Squirrel Member

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    Any sort of boost controller other than the N75 will negate any control your ECU has over boost.
    If your ECU detects certain problems it will try to limit boost to prevent engine damage, it will not be able to if the N75 is disabled.

    If you are planning a remap anyway, just forget about the bleed valve, and get the car mapped by someone who knows what they are doing.

    A bleed valve may cost pennies, but the damage could cost £££s.
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  9. dultanur
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    dultanur all promises, no action :)

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    totally agree with secret squirrel. the end results could be horrendous or nothing at all, just limp mode.
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  10. Ess_Three
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    Ess_Three Active Member

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    Haha...
    I though the exact same thing...

    Bleed valve = chavtastic RS Turbo with mahoosive exhaust and spotty, large gold rope-chain & Burberry wearing youth slumped behind the wheel.

    Don't do it...
    #10

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