Turbocharger on 290 D OM602

[rodion]

Hello folks,

I have just purchased a very rare MB. Its an Iglhaut 410D 4x4.
It should be an Afrika-Cruiser...
It has the naturally aspirated OM602 D29 (long stroke).
95hp @ 3800 rpm. 190Nm @ 2300rpm.

After I mounted big MT wheels the car lost any power
Although it has "short" axles and gearbox ratios.


So I decided to put some turbocharged power in that bus.
I do not want to put in a complete OM602 D25A because long stroke is cool for that heavyweight
and because my engine has only 100k km - it is like new.

I want to achieve about 130-140hp and some more torque (260-290Nm).

So I think of injection pump and cylinder head from D25A.
The piston-cooling oil-nozzles are already installed on my engine.
Maybe I have to take a bigger oil pump because of turbocharger.
Exhaust manifold and turbocharger should come from Sprinter OM602 D29 DELA.
Also I want to integrate an water-intercooler.

Are there any experiences on turbocharging an naturally aspirated diesel?
I have some fear of the "standard" pistons, crankshaft and bearing halfs.
Or are they though enough for turbocharging.

Thanks in advance!

regards Rod

[Malm]

Hi,

To execute such mildly performance increase which you are planning I quess there is no sense of making such big modifications(oil pump etc..).
Just update your Injection Pump to a better one and go ahead to apply the turbo installations, of course a good intecooler is essential and if your engine doesn't have an oil cooler, it is good to add.

I have a strong feeling that the cylinder head of a OM602A 2.5litre version does not go well with the 2.9 version 'cause of the bigger bore. The combustion space is bigger.

I am assuming that the 2.9 version iin your car is not direct injected?
Oh, and here in finland there are many NA engines which has been turbocharged, if you are not seeking for extreme performance increases, they work just fine. Assuming the basic condition of the engine is OK.

-RIsto

[rodion]

Hi Risto,

and thank you for the fast answer.

Bore is 89mm, 250D has 87mm. It should not be a problem.
I would use the cylinder head gasket from Sprinter 2.9

I wanted to change the oil pump, because the turbocharger reduces the oil pressure if you use a standard pump.
The costs aren't that high so it is not worth to argue bout it

My engine has an oilcooler, I would jist install a bigger one.

My engine is not direct injected. That is the little problem I see.
A very good intercooler secures the engine and lowers the temperature,
but such a 4x4 with 3,5 tons and a height of nearly 3 metres
has a big fuel consumption
- what means a lot of more heat after turbocharging the engine.

Do you have heard of temperature problems at summer in Finland
on the charged ex-NA engines?

And how do you define "extreme performance"?
150hp from OM602 isn't extreme I think
when I see your 400hp OM606 monsters

And my last question:
Which performance should be possible with serial OM602 Turbo ìnjection pump?
I don't want to spend money for a Mynä conversion of the pump.
And I have to remain at about 3800rpm as max rev.
Else I will have a too fast wearout due to the long stroke.

regards Rod

P.S.
What was said here?
http://www.mersuforum.net/forum/viewtop ... light=290d

[rodion]

no toher experiences or opinions?

[SamuliS]

P.S.
What was said here?
http://www.mersuforum.net/forum/viewtop ... light=290d

Hi Rod

Topic that your intrested is about buying a G Mercedes and turboing it, question is about should it be 290 or 300.

Regards Samuli

Ps. nice "van" you have there.

[SamuliS]

P.S.
What was said here?
http://www.mersuforum.net/forum/viewtop ... light=290d

Hi Rod

Topic that your intrested is about buying a G Mercedes and turbo charging it, question is about should it be 290 or 300.

Regards Samuli

Ps. nice "van" you have there.

[rodion]

Tanks for the compliment Samuli

@all:

What about the original natural-aspirated injection pump?
How much horsepowers are possible with the original pump elements?

I think I do not need ALDA, I wanna just turn up the fuel ratio,
so the engine will smoke until the boost comes.

regards Rod

[nokileka]

What about the original natural-aspirated injection pump?
How much horsepowers are possible with the original pump elements?

Just add turbo and exhaust manifold from 2.9D Sprinter or E290 and good intercooler. Stock engine can handle turbo, since there´s oil sprays to the pistons. Stock pump can be maxed out in order to reach your goal. There will be some smoke before turbo kicks in, but it can be prevented by the active driver - floor it once there´s boost

[rodion]

Hi,

yes, I decided to make an "simple" turbocharging.
Just add turbo, intercooler, bigger waterpump...

Unfortunately I can not use Sprinter manifold and turbo.
So I gonna weld a custom one.

What turbo size should I choose?
Of course I dont wanna have any turbolag.
max rev is 3800 at this engine.

Sprinter uses GT25C turbo.
But it is hard to find such a turbo for less money...
A GT25 A/R 0.64 costs new 850€

I can get a Schwitzer turbocharger (dont know exact model)
from Perkins 1104 engine (4.4 litres. 130hp @ 2200revs)
45mm air-inlet and 50mm pressure-outlet.





What do you think about the size of this turbocharger?

Cu Rod

[nokileka]

Perkins turbo looks good to me. Good sized wheels and small turbine housing. You´re able to get almost 200hp with that turbo. There will be some lag, since the turbo is bigger than stock OM603 turbo. Turbo lag is not an issue with 2.9 when the injection pump is modified, but can´t tell what will be the results with stock IP.

Anyway it´s a good starting point, you can upgrade the turbo later if it doesn´t work as you wanted.

[rodion]

Hi,

do you think the Perkins is even bigger than OM603 Turbo?

As I know
OM603 has K24 what means 59mm turbine.
OM602 and 606 have K14 what means 50mm turbine.

I dont want to modify IP, because 140hp maybe 150 are enough.
Clutch, gearbox (710.110 manual 5 speed, 1st gear 6,2:1 ), central gearbox are not designed for more power.
But the car should have minimal lag,
because there will be a lot of offroad-moments,
where I need torque at low revs.

I think an usual K14 will be too small for that displacement and stroke.
The 602 and 606 engine have there max revs at 4600...

cu Rod

[rodion]

Hi again...

do you think it will be possible to get at least 0.4 bar at 2000revs with that Perkins turbocharger?

Cu Rod

[nokileka]

I can get a Schwitzer turbocharger (dont know exact model)
from Perkins 1104 engine (4.4 litres. 130hp @ 2200revs)
45mm air-inlet and 50mm pressure-outlet.

Did you mean measurements outside the turbo? Or compressor and turbine wheel bigger diameter once housings are removed?

Stock OM603 turbo is around 42/49 if measured outside the turbo. To be specific, compressor inducer is 42mm and turbine exducer is around 49mm.