If you know anything about diesels, you won't get anymore performance from adding a larger turbo except more smoke and possibly less bottom end power. You would need to increase the air, larger intercooler, modify intake, larger IP elements, new manifolds and larger exhaust etc. When these cars run right with the adjustments correct, they have plenty of pep for a diesel. They were the fastest diesel in 1987 on the market. You *might* be able to get the pump advanced two degrees and get a little more power (more fuel) and better fuel economy. Stock is 14-15 ATDC +/- 1 degree.

I have vacuum issues with my trans on my newer 92 300D with the 5 cylinder. A MityVac from HarborFreight is your best friend. They're $30. Replace all the vacuum lines that look deteriorated, they're gonna cause leaks.

As for the nozzles, Mercedes S o u r ce has good nozzles that are better than the current ones on there now. They're made by Monark in Germany.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k