turbo for a 240d - PeachParts Mercedes-Benz Forum

ray m · #1 06-15-2009, 12:19 AM

can you put a turbo from a 1983 300d on a 1984 euro 240d

JimmyL · #2 06-15-2009, 12:21 AM

Can - yes

Should - no

ray m · #3 06-15-2009, 12:23 AM

Why .I'm learning

tbomachines · #4 06-15-2009, 12:35 AM

You're better off just doing an entire engine swap for the turbo 617. The engine simply wasn't made for having forced induction, so you'd have to replace a considerable chunk of it--meaning you'd spend wayyyy more than just taking a 617 and swapping it in. However as they say, you can do just about anything with enough money. Even with a turbo I doubt that you'd see numbers higher than a swapped 617.

On the diesel performance forum people have explored this topic and come to similar conclusions (the link is at the top when you head back to the diesel forum).

kerry · #5 06-15-2009, 09:04 AM

It can be done. There is a British company that turbo'd a lot of 616's in vans and motorhomes but it requires a lot of work resulting in a reduced engine life and marginal results. I've posted a link to the company here in the past. If you really want a 616 turbo, get Ghurka to pick up a contemporary Indian version of the 616 which is a true turbo model.
616 turbos are best avoided because it would require that Jimmy also be on the lookout for 240DT's.

75Sv1 · #6 06-15-2009, 09:47 AM

I think a few members have turboed their 240Ds. Do a search for 5 speed transmission. One of those threads has someone putting on a turbo. Also, look at:
Intercooler
Part of the problem is that with a turbo, you are pouring a bunch of heat from the exhaust heat to the air intake air. This heat dumps on top of your piston. Not good. So, most turbo engines have oil nozzles that 'squirt' oil on the underside of the piston to cool it down. I haven't looked at what would be 'involved' in adding these to the 616.
Another work around is to add an intercooler. It will cool the intake air down to an acceptable level. So you are not pouring a bunch of heat on the top of your engine. This will lessen the need for the oil cooling nozzels.
Tom

75Sv1 · #7 06-15-2009, 10:54 AM

Here's the link to the other 240D turbo posting:
240dt
Its on page 2 of the Diesel Performance forum.
Tom

moon161 · #8 06-15-2009, 11:05 AM

Graminal95 has turboed his OM616, limits his boost to 7 or 9 psi, watches EGT's so not to cook it. He may be done adding his intercooler to depress EGT's. Claims mileage in the high 30's.

75Sv1 · #9 06-15-2009, 12:04 PM

Quote:

Originally Posted by moon161

Graminal95 has turboed his OM616, limits his boost to 7 or 9 psi, watches EGT's so not to cook it. He may be done adding his intercooler to depress EGT's. Claims mileage in the high 30's.

He also added a 5-spd. From what I gather a 240D with a manual 5-spd should get around the mid 30's highways. I got 28.5 mpg, mostly highways in my 4-spd. I was probably doing 70 mph most of time.
Tom

Hip001 · #10 06-15-2009, 03:01 PM

This is interesting! I often wondered this too!

Graminal95 · #11 06-15-2009, 10:05 PM

You can turbo a 616 but I would not expect it to last as long as a 617A. I have put well over 30K on my setup without any trouble, except high EGT's above 8k feet. The blow by is the same as it was when I purchased the car with 108K miles; I have ~159K now. I don't expect to get 300K out of this car, but it is my daily driver and I can't afford to replace it, so I try and keep things on the safe side.

The boost is not limited right now, it will not make much over 13psi as the turbo is a little big for this engine/output and thats at redline. The intercooler and the new airbox/real cold air intake like the factory setup, help keep EGT's down.

The 5 speed is not in right now as there is a vibration issue that needs to be addressed and I don't have the time right now to figure it out right now.

I do get in the mid 30's all the time. I drive between 450 and 650 miles a week and see 34.5 to 36.5 mpg depending on AC use and cruise speed (65 vs 75). I have seen 37 twice but that was odd driving conditions.

I just added a 2 speed electric cooling fan, I don't think it will help the mpg's much but the noise is a little less at cruise.

Ray M if you have the means and do things properly I don't see why you should not turbo your 240D. Just don't expect it to last forever and don't expect turbo 617 power. Its great for a little more ummmmmph and mpg's, but takes a bit of time and parts. If you search, you will find my posts listing parts and what needs to be done to make it all work.

diametricalbenz · #12 06-15-2009, 11:58 PM

How much boost pressure are you getting currently?

Graminal95 · #13 06-16-2009, 05:54 AM

Right now it will boost to about13-14psi but only near red line. So normal usable boost is in the 6-9psi range. I want more boost low down in the rpm's but a small VNT is not that easy to come by cheaply in the US.

#14 06-16-2009, 08:49 AM

Going to have to side with the swap in a 617 and call it a day. And to say it again you can do anything with enough money the question is should you? But your car and your money. Good luck with what you decided.

75Sv1 · #15 06-16-2009, 09:30 AM

Quote:

Originally Posted by Graminal95

You can turbo a 616 but I would not expect it to last as long as a 617A. I have put well over 30K on my setup without any trouble, except high EGT's above 8k feet. The blow by is the same as it was when I purchased the car with 108K miles; I have ~159K now. I don't expect to get 300K out of this car, but it is my daily driver and I can't afford to replace it, so I try and keep things on the safe side.

The boost is not limited right now, it will not make much over 13psi as the turbo is a little big for this engine/output and thats at redline. The intercooler and the new airbox/real cold air intake like the factory setup, help keep EGT's down.

The 5 speed is not in right now as there is a vibration issue that needs to be addressed and I don't have the time right now to figure it out right now.

I do get in the mid 30's all the time. I drive between 450 and 650 miles a week and see 34.5 to 36.5 mpg depending on AC use and cruise speed (65 vs 75). I have seen 37 twice but that was odd driving conditions.

I just added a 2 speed electric cooling fan, I don't think it will help the mpg's much but the noise is a little less at cruise.

Ray M if you have the means and do things properly I don't see why you should not turbo your 240D. Just don't expect it to last forever and don't expect turbo 617 power. Its great for a little more ummmmmph and mpg's, but takes a bit of time and parts. If you search, you will find my posts listing parts and what needs to be done to make it all work.

So its around 35 mpg with the turbo and 4 spd? Also, do you have any milage figures with the 5 spd? Also what size VNT turbo would be needed? Any vehicle donor to look for? Any Cummins/Holset turbo that would work?
Thanks,
Tom