VR_Life

on the road-side, to keep 2.7T going for a *little* while longer is to simply disconnect the N75 valve. See connector here:

<img src="http://pictureposter.audiworld.com/15888/n75.jpg">

This disconnects the ECU control of the wastegate, but you won't be entirely "naturally exasperated" like our 2.8 cousins. The WG actuator spring tension will still hold the WG closed till ~0.5 Bar. However you may be able to plant your foot without sounding like a tea kettle, or leaving 007 smoke screen.

Keep in mind : The whistle is due to damaged/bent fins on the compressor at high spindle speeds, but even with WG disconnected the wheel will still be spinning. So depending on how bad this is you may get home, a few hundred miles or even a few months more using this trick. This is not a permanent fix - like death and taxes, the untimely demise of damaged K03's is guaranteed. So start your search for a decent set of K04's (even if you just want to run Stock s/w)

absolutcq20v

Makes sense to me; hope I never have to use it. lol @ 'death and taxes'.

A6sport

You bi-turbo guys make me sick...with envy -

paulroad

A bent fin would not reult in oil going into the system. The whiste-siren- Tubo Lady is usually a damaged impeller shaft. The seals along the shaft are no longer sealing and a letting oil into the system instead of lubricating the shaft.

What you are doing with your short cut is allowing oil into the the intake, which will not only foul your plugs but render your cats useless. It s short cut to the poor house.

Just Me

...loosening and making noise. Which also explains why they next start to consume oil....

Fortunately, mine were quiet as a mouse for its life with me.

Grant

OCDboy

By disconnecting the N75 will leave the wastegate open? I thought the wastegate opened with vacuum from the N75 applying vacuum to the actuator. If you disconnect the N75 I'd think it would leave it closed which is not the intent.

Which...I've seen people leave DE's with blown turbo's and drive home...750 miles for one person.

VR_Life

As it wobbles it creates leaks on the compressor or turbine seals. At very high shaft speeds it starts to rip into the bearing, bushings and seals and self destruction leads to catastrophic turbine-side seal failure and blue/white smoke as oil hits hot exhaust gas.

VR_Life

Vacuum to hold the WG closed, and positive pressure to push it open.

In normal use the n75 actually pulses both ways with a duty cycle proportional to goal boost.

Disconnecting the n75 actually leaves the WG in it's natural resting state i.e. actuator spring pressure holds it closed. However the force of the exhaust gas on the WG will counteract the spring and push it open ~0.5 Bar (hence limp mode is ~0.5 Bar)

VR_Life

whistles "whistle"

Fins moving through air and creating turbulence inside an enclosure is the reason all turbos, jet engines, hair dryers, or any other kind of turbines make whistling noises.

Shafts inside an oil lubricated assemblies do not "whistle". They either make no noise, or a grinding noise due to lack of lubrication, shortly before seizing.

You have no idea what you are talking about

Just Me

This is not what I would assume, nor is it the traditional turbo failure mode (which was bearing lubrication failure, mostly due to super-heated, and then coked, oil)......

Or are you saying "if it whistled this is the cause, btu the failures often come without a whistle".....

Grant, who no longer has a dog in this fight, but is still curious