Just to clarify, this G wagen went from 62 sec 0-90kmh down to 18 sec 0-90kmh? Holy crap. Thats like strapping a rocket on your back.

I also note 1,8 bar boost... thats about 28psig!! I would've thought something would've failed or on its way to fail as the design boost is about 0,8 bar?

Then you said its a regular OM617A, no changes other than the pump. So what pushed the boost so high? There must be some magic happening somewhere that I am not aware of.

There is plenty about injection pumps I do not know, and I thirst for knowledge!

__________________
1985 MBZ 300D (DD, 240k, unmuffled hellion!)
1982 MBZ 300D (372k, retired for parts)
1981 MBZ 300D (575k, parts pig)

hi Raven,

the math is simple,if you have means to increase fuel you can easily
increase air (adjust the turbo wastegate)

if you dont have proper fuel paired with air increase you can easily
destroy engine i.e guys setting boost to 2 bar on default turbo
without upgraded pump.

so...no magic here,just hard work

cheers

__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered

I will be very interested in these when available! i think i have squeezed as much power out of my pump with torque control capsule adjusted, max rpm adjusted, and 15psi of boost with 25- 26 degrees timing. it has made a huge difference especially in the sub 3000 rpm area. i will be sending my turbo off for a 55 or 60 trim compressor wheel with a rebuild and new turbine wheel too when i have the extra money. when they're are installed, should the pump be left alone or will those adjustments benefit any? i'm sure the turbo will help... if it can get the same or better mpg when driving easy, i'm totally sold. what kind of realistic power can one expect from just these elements and maybe the compressor wheel upgrade? thank you!

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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect

I am going to speculate that more boost then needed to burn what Fuel the IP is injecting means more work for the Engine to compress higher density Air into the same space.

I don't think that injures anything but I think it has adds a minsicule extra load on the Engine meaing a miniscule loss of performance.

The exception would be if you are at some high altitude.

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84 300D, 82 Volvo 244Gl Diesel

Boost if a function of fueling assuming that the wastegate is not limiting boost. In other words as fuel increases so does boost. Boost also increases with engine speed. I am getting 16 psi on my 616 in a 240 with a tuned but not modified mw pump. Rpms need to be around 4000 for that.

__________________
1977 240D turbo

boost increases only with engine speed,as a result of boost increased fueling
is rising according. 16psi is way too much for unmodified 616 mw pump. It will
give your engine too much compressed and hot air which will result in several
possible scenarios...blown head gasket,superb oil consumption,piston melt....etc.

in the other hand,you can get away with it if you drive at 4000rpm short bursts
in your current setup...

the only math that has to be used in tweaking is proper measure of air and fuel ... wrong setup will give you either too much heat or very poor mpg's.


cheers
ChO

.

__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered

Are you able to modify MW pumps from later OM617 engines? I have a 1985 mercedes 300tdt, but I am in the US. Thanks.

Dieselmeken or any other reputable MW pump maker, Please post here with any updates as I would be very interested in buying something like this.

I was under the impression that bigger elements only gave bigger power if using a turbo. I have N/A MRSF Euro 1980 pump in Australia and inquired some time ago. Still interested if this is possible, what are the mods I have to get done?

The mods on this engine Tom did mention were solely a modified pump with bigger elements from Tomnik. That´s it.
We are in the process of developing more components like nozzles and flow improvements to create a nice package.

Gruß
Volker

A cleaner way to add power,and cheaper.Is to go with propane for full throttle.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

I am new to this forum and have enjoyed researching the 617 engine, but I am confused by all of the posts that are out there.
I have an 83 that I would like to get more power and more mileage out of it.
What is the best way to accomplish this?

check linkage play

replace all rubber fuel hoses you can find!

check/set your pump timing

get a set of new nozzles and a performance overflow valve spring from forum member "greazzer"

overhaul your pre-supply pump

build a 3 inch free flow exhaust

set turbo pressure to 16psi

Turn ALDA screw out 1.5 turn


in that order



The OM617A engines got sluggish over the last 30 years by wear. Fortunately the engine allows you to change settings....

And with the settings mentioned above and still stock pump you can.... (205 Dunlop SP Sport tires)
I get 28-31mpg with that setup with normal driving


Gruß
Volker

my settings at the moment

https://youtu.be/dWngGa0Xlo4

Gruß
Volker