Hercu Posted May 7, 2017 Share Posted May 7, 2017 I have fitted my Disco with this VTDi turbo with bit more extra boost and could easily boost up to 1.2 bar. I still get the boost but a serious whine changing pitch as the boost drops and rises. Black smoke and not really the power it used to have although the boost is still on 1 bar where I have set it. EGT also quickly rises above 720 when pushing hard uphill. Could it be the dump valve ???? Quote Link to comment Share on other sites More sharing options...
hangover Posted May 11, 2017 Share Posted May 11, 2017 What model turbo is it ?, most of the VNT's from VW or BMW need to have the actuator replaced with one that works on pressure and not vacuum. Quote Link to comment Share on other sites More sharing options...
Hercu Posted May 20, 2017 Author Share Posted May 20, 2017 Hi Hangover Sorry, My third world technology failed and we have been out of internet coverage. It is a Garret GT 22 56 VNT and yes the actuator is working on pressure... I have had it sent to SA and they fitted a new CHAR( Old one totally F......ed and spool vaines chipped) and actuator as the old one was leaking. Thought they would set it but needed to adjust the rod length and stop screw to get my Disco alive. Still a bit hot as EGT quickly rises with black smoke puff when vaines opens completely on 1800 RPM. Boost 1,4 Bar. Will damage head gasket ? Quote Link to comment Share on other sites More sharing options...
Ex Member Posted May 23, 2017 Share Posted May 23, 2017 (edited) Turn down the fueling until you get to the smoke and EGTs you want. EGTs are the concern, not boost levels. Edited May 23, 2017 by Red90 1 Quote Link to comment Share on other sites More sharing options...
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