I'm guessing you are talking about OM617 to OM617a?

If so you'll find loads of information on the forum about it.

Most people will say just go and buy a turbo engine.

If you want to do the same job as Mercedes you should have a look at the following SAE publication

The Turbocharged Five-Cylinder Diesel Engine for the Mercedes-Benz 300 SD

You might be able to obtain it a no cost via your local library.

There is information about this publication here

OM617 SAE Paper

There are a few people who have made some conversions to their normally aspirated (N/A) om617s and you'll find most of these threads in the diesel performance section

Diesel Performance Tuning - PeachParts Mercedes ShopForum

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!