300D Non-Turbo to Turbo
 

I read that the older non-turbo 300D engines are not capable of accepting / running properly with a turbo installed. Is this correct?

Probably can be made to work but reliability is questionable. Just adding air won't do much, you should add fuel too with a turbo IP. Might as well add a turbo cam so it can breathe. Good used turbo engines are readily available so it makes little sense to not do it "right." I mean the good used turbo and IP you'd use in a conversion are probably attached to a good used engine.

Sixto
93 300SD 3.0 - comatose

It will run for a little while :D

It is way way beyond most peoples skills to make a non-turbo engine a turbo engine but its not impossible. It is far less work and probably cheaper to just get a turbo engine and drop it in.

You would need different prechambers, a different injector pump, a different crank, a different set of pistons, a different set of connecting rods, and a different set of exhaust valves.

You would also have to drill and tap into an oil journal to install the piston oil squirtters.

For the most part that would do it. Just get a turbo donor.

In short- Yes, it's possible to convert one but it isn't recommended due to longevity issues.

The best way is just to get a turbo engine and swap the entire engine.

Sorry to bring back an old thread but my car (82 300d non turbo - euro car) is about to be the guinny pig.
I have the exhaust manifold and the turbo to match up, i just need the matching (turbo) intake - if anybody can help me out. The reason is because the non turbo intake doesn't have the flange for the wastegate control (obviously) and it probably is in the way of the turbo itself.
As for the internals of the motor and fuel adjustments, I will get to that after the turbo is installed. If this whole thing doesnt work then oh well. The car is slower thatn death and is worthless to me with out more speed.
If anybody has been down this road or can help me please let me know.
Thanks alot
Robert

By the way what is a Turbo "IP" - injector pump?

Yes. More air without more fuel won't make your car noticeably faster.

More fuel means more heat. Thus the oil squirters to cool the pistons and the different (sodium filled?) exhaust valves. If you install an EGT and watch it, you may be able to get the engine to last without these.

Thanks for your reply Matt,
Right, So do you know how much the non turbo injector pump can compensate for. (im only looking for a few psi right now)
I have an understanding on how the whole system works I just dont know the details (just geting into this - have a supercharged cobra and know what needs to be compensated for there, but i have no experience on diesels).
How does this motor calibrate the fuel or does it even do that (I know diesels do not have throttles and thus no vacuum) Does it possibly pour fuel depending on pedal placement?
So there are oil squirters to cool the pistons? hmmm I wonder if my non turbo even has an oil cooler or the squirters?

http://cgi.ebay.com/ebaymotors/Mercedes-diesel-turbo-injection-pump_W0QQcmdZViewItemQQcategoryZ33555QQihZ003QQitemZ130169478579QQrdZ1QQsspagenameZWDVW
would this do me any good or does it require a lot more than that?
By that i mean would i also need a new fuel pump and injectors to go along with it?

You're only likely to notice a difference at altitude where the turbo will compensate for the power loss as a result of thinner air. I doubt you'll see any significant difference at sea level.
The amount of time it takes to install a complete turbo engine is pretty small and a much better time investment over turbo'ing the NA in my opinion.

The non-turbo injection pump can compensate for sea level. That's 0 PSI.

A diesel regulates the injected fuel quantity and timing to throttle the engine. Pushing the pedal further increases the injected quantity and may affect the start of delivery timing (I'm not sure on these engines).

You do not have the cooling jets (oil squirters). I don't know if you have an oil cooler.

Ok, well if i had the intake manifold i could probably get the whole install done in less than a day, but if it doesnt do me any good then whats the point.
So don't these turbo motors cost around 2k? I only have about 200 in it right now and I dont think the car is even worth 2 thousand dollars (although it only has 100 thousand miles and is a 4 speed manual euro car). I wouldnt mind spending time and research to get this to work right but I would need more knowledge - which I already doubled today by getting on this site.
Did you see that turbo injector pump on ebay by chance? would that be needed.
-Kerry if you dont mind, would you be able to give me a brief overview of what is needed for the complete turbo engine swap?
Thanks again guys
Robert

Pull the old engine out, put the new engine in. Modify the exhaust, that's about it. You'd have to mount the boost control valve on the firewall. Used turbo engines should be available for a lot less than 2k. Easiest way would be to buy a wrecked turbo 123 so you have everything available including the exhaust. Switching engines if everything goes well should be doable in 2 days work.

ok Ill check into that. Are there any electrical components to this?
I havent noticed much but mechanical driven components under the hood.
Thanks

NAZIMOBILE??? WTF. are you insane? there's Jews on this forum my man. I am one. not that I give a **** about ethnicity, or religion, but still.
delete yourself, think some and then come up with something better.
by the way, the N/A 300d has higher compression. all you need is intake and exhaust manifold and some machine shop to add inlet to oil pan for the turbo drain. from there it's all fun and games. these engines are way overbuilt, and if it breaks, who cares really. it's just a car.