i have question to anyone who are running or have used Holset turbo on there Mercedes engines, Do you use turbo restrictor on turbo feed line? if yes what size?
As i have smoke coming from turbine housing and from the v-band between turbine housing and core. the smoke increase with rpm, at idle there is nearly no smoke.

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W123 - M111+Turbo

What size is your oil feed line? Same question about oil return and where its running to engine?

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MB 300CE Turbo '88
MB 300E '86

My line is -6an and i'm using holset original drain which is 19mm welded to 25mm adapter then 25mm. Oil is from adapter where the pressure sender unit us.
At first i thought the smoke was the wd40, which i sprayed it on the exhaust housing few months ago, is evaporating.
Removed the turbo the other and can only see very small amount of oil in the housing, tomorrow i'm going to test a 2mm restrictor

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W123 - M111+Turbo

to update this, a 2mm oil restrictor seems to fixed the problem

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W123 - M111+Turbo

Nice! on a m111? I'd like to see video / pics of that when you're ready

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w201 + m103.983 swap

It's stock 2.2 m111 engine with hx30 turbo and MS2 ECU

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W123 - M111+Turbo