If you take a look at the specs for a NA 940 and a Turbo 940, you'll find that they are very different cars; it's not just a turbocharger bolted to the exhaust. Turbo 940s have a lower compression ratio, a different ECU (or at least a different software running the ECU), a slightly different AT, a rear differential with different ratios, different exhaust, even different spark plugs! Do not remove the turbo from your car. I totally agree with other posters that the turbo should last you a long time, and if it fails, it will give you enough time to plan its repair or replacement. Mine was making a funny sound on decelerations, a couple of years ago, so I had it rebuilt at shop specializing in trucks and buses' turbos. They had it ready in 2 days, good as new. I would follow the advice others have given: change your oil religiously, drive the car slowly until it warms up, and allow it to cool after "spirited driving" before shutting down. Take a look at the small intercooler hoses which are often overlooked and may need replacement. Check the air intake hoses for holes or softness, and always have a clean air filter installed. I was told that if debris/dirt gets sucked by the turbo it can damage the pallets due to the high speeds. Finally, remember that you own a tank, so don't worry beforehand, and follow the golden rule: if it ain't broken, don't fix it.

I have a 1988 765 GLE that was de-turboed 50,000 miles ago. All that I did on the original engine was to put an expansion plug in the block turbo oil return hole, put on an N/A manifold with drop pipe off of an N/A 245, and remove the remote oil filter unit (and shorten the bolt).

Since that was done to lengthen the life of a severely worn block, I changed to an N/A engine after a couple of thousand miles. There was no change in mileage and very little HP loss below 3000 rpm.

Regards,

I came across a 740 in the junkyard that someone had removed the turbo and then had plates welded on both sides of the manifold to close the openings that the cartridge would have normally occupied.

Of course the normal routes for coolant and oil would need to be dealt with as well.

I think you would be disappointed with the results; even more of a slug than a normally aspirated engine.

Randy

I am not sure how a Turbo car could operate without the actual turbo installed. You would have open oiln & coolant lines- not to mention a disconnected exhaust manifold(very, very loud). If you are truly worried about being without a car for a few days I would find a good used($125) or rebuilt($350) turbo so If yours fails you could install the other in about an hour or two. I think Turbos usually fail quite slowly so you prob wouldn't be left on the side of the road should yours decide to go.

Anything is possible but this modification is not easily done or recommended...
Better take good preventive measures and the turbo will last you the life of the car, may be. Change oil regularly, preferably with full synthetic, observe warm up and cool down, and you'll be fine...

I think there are compression ratio issues - try a search on that.

Ron