Inlet manifold safety valve

[Scottishcarnut]

Hi guys,
Hope someone can help. I'm about to do the white ring mod and turn the boost up on my freshly re built 1.5TD . However I have been told that there is a safety valve that needs welded up as it opens at 1bar or 14 psi. I have an intercooler fitted and am ready for more boost. Bit pointless if I can only hit 1 bar when I know these are capable of 1.2/ 1.3.

In short, could someone tell me or even post a picture of where the safety valve is so that I can seal it up please.:confused:

[grooge]

top of the inlet manifold mate, i'll try and get you a pic later

[grooge]

http://www.pngclub.com/forum/showthread.php?187802-vauxhall-nova-sx-turbo-diesel-rare-car-getting

quick google brought up this, you can see it in the engine bay pic

[Scottishcarnut]

Is that the circular item that is attached to the inlet under where the original air filter should be?

[grooge]

yeah