VNT turbo is fitted photos

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Originally Posted by Vern

My vnt is vacuum operated with a Dawes valve to open and close the vanes, for now I have the vanes wired shut as it was making odd noises when they were half way opened. Am wondering if pressure actuating is easier/better.

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AFAIK, there are only a hand full of pressure actuated VNT turbos. Most seem to be vacuum

As far as having them shut? all I know is when my rod end broke, the car lost power and egts where noticably higher for a given road speed in "x" gear

I drilled and tapped the hole in my old cast 300tdi manifold just before the turbo inlet. worked ok fora few years until i changed to the VNT,

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Originally Posted by simmo

I drilled and tapped the hole in my old cast 300tdi manifold just before the turbo inlet. worked ok fora few years until i changed to the VNT,

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any idea how thick it was at that point?

I drilled the port just in the center of the manifold near the turbo entry. The metal there is about 6 mm thick. you can move it over to the right a bit towards the bolt for the small hatch the metal is getting thicker there, and its closer to the turbo inlet :)