Turboing OM616, technical questions
 

Hi, to all.

I am thinkig about turboing 240D, and i have few questions about it.

1. oil to feed turbo.

solution
http://lh3.googleusercontent.com/-gv...0/DSCN3639.JPG

This is solution from member Graminal95,
what do yout think about it, what restriciton should be made, so that the oil pressure don't drop too much, but there would be enough oil for lubrication.

In europe there is not easy to find back plate of oil housing for 300DT.
There is option for drilling original back plate, maybe it is better solution?
here is picture of back oil plate
http://img402.imageshack.us/img402/299/oilplate.jpg

2. Oil cooler

would it be good souliton if oil from turbo, goes through some kind of cooler, that have horizontal lines, so that there would be no, or very low flow restriction.

what about adding original oil cooler from 300D, is it possible to drill holes in front of oil filter housing, and put oil cooler?

http://www.benzworld.org/forums/atta...00542052pm.jpg

3. safe limit of EGT?
i guess that the safe limit whould be about 1000F.


Thanks a lot.
If you have any other suggestion please write, thanks!

anyone?

There should be a restricted oriface right at the turbo, look at your turbo where the oil goes, and you will see only a tiny hole for the oil to go in. No need to restrict it anywhere else.

I think the metal on the back plate of a non turbo engine may be a bit thin to allow drilling and tapping for an oil line. You may need to weld a bung on it.

I don't see any need to cool the return from the turbo. Although you may want to change the oil cooler for one from a 300. So far I have not. Perhaps put a oil temp gauge on, this would be in the oil pan.

1000F seems good. 47 dodge has it right. You need todrain the oil in the most vertical route possible to the oil pan.

Ed

thanks for reply!

yes there is a restriction on turbine, but we will se if that is enough, so my oil pressure dont drop too much.

On EU models, only om617 have oil cooler, 615 and 616 doesn't have it.
I will have to see will it work without it.

i will install oil temp gauge and watch for temperature, for mineral oil I will try not to pass 240F.

Thanks, any suggestions are welcome!

My oil pressure is staying 20-25 psi at idle. And I do also have a bypass filter taking a little extra oil.

Generally 1250, continous, 1500 for short times is considered ok, but without piston oil squirters, lower would be wise. Right now mine will not go above 1000 with my current ip tune. It only made it this high pulling a trailer. normal driving about 850 is about as high as it will get when going uphill.

Ok, then it is time to run some big modification and test it.
I hope that nothing will go wrong, but we will see.
Thanks!

Is there a way to add the little vacuum thing on the IP to increase fuel when the turbo is on boost, like the OEM turbo models? I've thought that adding a turbo to a 240 would be a good idea, I just never looked into this aspect. I've driven a 240 with a turbo but it was air only, and the power difference was hardly noticeable. How do you get the extra fuel in?

Kevin

Yes you can change the thing on top to one from a turbo charged 617. This is the Alda. I did not bother with adding an alda.

However you still need to have the ip(injection pump) recalibrated for more fuel to see any real gain from a turbo.

what type of diesel injectors do you use on OM616?
are there any benefits from using one from OM617 Turbo

I am getting prices for a higher flowing nozzle than the ones that are currently use on MBs, from both Bosio and Monark.

As soon as the prices come in I will be putting in an order for my 616turbo and 617aturbo.

A higher flowing nozzle will help to reduce the injection time allowing more fuel to be delivered while staying with in EGT limits. If you really want to go for it, a 10mm IP will get you to the top of the class.

is there any good if i use bigger injector nozzle than standard.

let say that the original is (bosch)SD 240, what wolud be if i put SD 265
that is used in w124 300DT or in w140 350 DT

I did use injectors from a 617a, and the pre chambers too.

I thought I would document the effort to put 617a piston cooling Squirters in a 616 for a turbo build.

I questioned if there was enough wall thickness in the block to tolerate the invasive modification, but after seeing a video of someone else doing it, I an not as concerned lol. I am still going to check the thickness after machining to know where it is at. I am using a junk block as a test. Not pleased with how the cutter performed... I'm going to try a different type of insert and see if it is any happier.

I am also going to have to make up some shims to raise the squirter up to the proper height as the distance from the bottom of the block and the base of the cylinders is greater then the distance from the bottom of the block to the squirter pads on a 617a

Great progress and Great Work !