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  #1  
Old 04-18-2011, 09:13 PM
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Question Whats involved in adding a turbo to a non-turbo 79 300TD

Found a 79 300TD in good shape and good price. But would like to add a turbo.
Is it easier to add a turbo engine then make a non-turbo a turbo?
Was sure there was a post about this before, but I cant find it.

Thanks. Jay

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Old 04-18-2011, 09:17 PM
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In order to do it right, you would need to remove the non-turbo engine and install a turbo one. In order to make use of the increased available torque, it would also make sense to swap in the rear differential from a turbo car, along with the speedometer (or just the whole gauge cluster) in order to keep it accurate. Not the easiest job in the world, but it can be done.

Adding a turbo to a non-turbo motor is probably not going to give you the results you want unless you do a complete teardown and rebuild, changing a lot of things in the process.
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83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 367,xxx miles
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  #3  
Old 04-18-2011, 09:19 PM
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Quote:
Originally Posted by Targa-NF View Post
Found a 79 300TD in good shape and good price. But would like to add a turbo.
Is it easier to add a turbo engine then make a non-turbo a turbo?
Was sure there was a post about this before, but I cant find it.

Thanks. Jay
Yes !!
You can put a turbo on it but MB proved during their development of the 617turbo that you will destroy it. Different pistons, oil squirters, much bigger oil pump, sodium filled valves just for starters.
There are some after market turbos about, particually for RH drive cars, MB didnt turbo RH drive 617s. Just remember a NA 617 is a big improvement on a 616.
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1967 230-6 auto parts car. rust bucket.
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  #4  
Old 04-18-2011, 09:24 PM
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Find a turbo car at the jy. Grab the turbo, exhaust and intake manifold, exhaust downpipe, air filter housing, oil filter housing, turbo oil lines, and injection pump.

Or take the whole turbo engine, with the added benefits of being more robust.

It's not cheap to to do piecemeal, unless the turbo engine you're grabbing bolt on parts from is toasted, you may as well grab that whole turbo engine.


Differential is optional, it will improve fuel mileage.
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  #5  
Old 04-18-2011, 09:25 PM
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the transmissions are different also, as is the method of measuring pedal movement on the transmission... it's frowned upon to use NA trans behind a turbo motor, but it's been done.
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  #6  
Old 04-18-2011, 09:47 PM
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Your 79 probably has the 3:46 differential. the turbo W123, 82 - 84 have the 3:07 and the 85 has the 2:88 diff.

The spedometer is geared to the diff. so grap the spedo with the diff if you pull one.

You can throw a turbo on a NA engine, it will work.................... for a while.

Charlie
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there were three HP ratings on the OM616...

1) Not much power
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Anyone that thinks a 240D is slow drives too fast.

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  #7  
Old 04-18-2011, 11:22 PM
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ahem, try to ignore the naysayers. i turbed my 616 and drive it everyday, it can be done and is not that hard if you are mechanicly inclinded. that being said be careful and if you love your car and want to keep it forever dont modify anything.
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Old 04-18-2011, 11:25 PM
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Quote:
Originally Posted by josha37 View Post
ahem, try to ignore the naysayers. i turbed my 616 and drive it everyday, it can be done and is not that hard if you are mechanicly inclinded. that being said be careful and if you love your car and want to keep it forever dont modify anything.
Did you put in the oil squirters and oil cooled pistons ?
At least you were really honest... that last sentence is really true....

Have you posted pics of your turbo'd 616 ?
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  #9  
Old 04-18-2011, 11:33 PM
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Yea there have been pics, videos, discussions. The engine internally is 100% stock.
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  #10  
Old 04-18-2011, 11:38 PM
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Couple quick videos

^ proof
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  #11  
Old 04-18-2011, 11:43 PM
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I'm Melting !!!

You have to remember folks...Mercedes was building an engine for the ROW as well as USA during which time had a 55mph speed limit. iirc.

Being as it was to be used on the speed limit free autobahns of Germany, it needed squirters etc if it was turbo'd.

I have turbo'd a few n/a engines myself that folk said would melt, they didn't , although I never drove them long and hard, understanding their limits.

There was a company in the USA that was offering a turbo kit for the 240D at one time !

Guess who ?

http://www.superturbodiesel.com/std/thread-callaway-240d-turbo-article-with-pics


.
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  #12  
Old 04-18-2011, 11:45 PM
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I have turbo'd two non turbo engines the 2.2 ecotec in my cavalier (14 lbs) and my 240d (~20 psi). Long live boost!
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  #13  
Old 04-18-2011, 11:45 PM
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Speedo head?

I don't think that will get 'er done. You need the drive gear from the transmission, I believe.

Jay

P.S. You'll need the entire exhaust. You'd be better off switching out the engine and transmission, as a unit. I don't know that it will be easier, necessarily, but you will be happier with the end result. Driving up a mountain with the fam is NOT when you want to melt a piston or five. Intercooler and EGT gauge a total must. Lots of work. Better yet, just buy an '84!
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  #14  
Old 04-19-2011, 08:29 AM
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Yah I remember now that is was better to swap out the whole engine and tranny. Shes a clean rig and I have a strong engine in a rusted out SD. Will just swap out it all. Another thing I forgot to ask is was it 84 the last of the Super bullet prof 617? I thought it was 81-85. So is 85 the engine they changed or was it 86? looking at a few different CD,SD,TD's and dont want the one that was changed from lets say the 83 turbo 617.

Thanks for all the help everyone.
Jay
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83 300TD Sable 402K " Work Truck "
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04 E320 Blue 90K " My Winter rig "
07 BMW X5 4.4 118K " My Summer rig"
04 Jetta TDI Wagon 168K " Wifes "
08 Toyota FJ 109K " Wifes winter rig "
04 Jetta TDI 120K " Daughters Car "
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  #15  
Old 04-19-2011, 09:29 AM
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617 thru 1985 in 300D's TD's and SD's

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