RS2 Waste gate where do I connect the vacuum pipe?

[joss01]

I noticed on the side of the waste gate the is a connection for a vacuum tube can anyone tell me where to connect the tube

[Tractor Dave]

There is a connection that's not used. Have you got a pic so we are talking about the right one?

[s0_big]

This one in my picture is not used:
45764-b131b8e5dc2f49af76e81c5d6db091b0.jpg

[joss01]

Thats the chap what does it connect to

[steve briance]

The two responses above both say its not used. I guess it might not connect to anything...

[joss01]

Great I thought it was there to control the turbo over boosting the engine

[Rikki Kitto]

Not in use, something for doing checks with I think

[joss01]

Great something else to cross of my list of "what is this for"

[rustybullethole]

It's there to check if the diaphragm is split by fitting a vacuum pump to it and pulling a vacuum. If the vacuum falls you have a leak/split in the diaphragm.

[newsh]

The larger one with the banjo on the WG lower chamber connects to the face of the turbo cold side via the N75. This controls the boost.

[newsh]

[joss01]

great thanks for the image put my mind at rest

[shorty_94]

The connector is a relic of the 10V Turbo engine, where boost was regulated via controlling the pressure of the upper wastegate chamber.
On 20V Turbos, the boost is regulated via controlling the pressure of the lower chamber.

[joss01]

I remember now had a WR UR and yes it was connected at the upper waste gate looking at the RS2 it has a tube coming out from the lower part of the wastegat controlling the pressure