In the real world, $20 would cover about one man-month of engineering time. That might be enough time to prepare a conceptual study and come up with a preliminary estimate for the detailed design cost. Just the engineering (design only, not software) would cost several $100K, before any hardware is built. A million dollars is a pretty small project, if you are talking about anything that will go into production. You might be able to cobble something together yourself for $20K, if you don't count your time; and it might even run.

No argument for production. Especially with all the requirements of todays engines....

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

If I am annoying you just tell me and I will stop this discussion. (I'm new here and I don't want to get banned or something )

Let's do a price quote for the electronic hardware system:
PCB: 100$ to manufacture
Processor: LPC2294 = 50$ (or less). LPC2103 = 5 $ (but has limited resources)
Various components (quartz, condensers and others) = $100 (insane, but let's be generous).
Protection systems specific to engine environment (filters, high voltage protection and others) = $50
Power electronics (to actuate the injectors) = $ 50
Casing (resistant to vibration, and outside environment conditions, heat) = $200

So as a sum, the whole electronics involved should cost about: 500 $

And the software development costs nothing but time if you do it yourself.

You're not annoying me, and you won't get banned.

I agree that the electronic hardware is inexpensive, I was talking about the cost of redesigning the actual engine components (i.e., the head). I thought we were talking about converting from indirect injection to direct injection, which would require significant engine redesign. Just converting from a mechanical to electronic fuel injection system would require the installation of a fuel pump and a crank position sensor, in addition to the computer controls. I'm not saying it's impossible, but it would be a bunch of work.

On this issue I must agree with all of those who said: you want a DI engine in your w123? THEN GO AND BUY A NEW MB DI ENGINE AND FIT IT UNDER YOUR HOOD!!!

Again, what is the point? The already existing mechanical system does everything you are asking and it does it efficiently and reliably.

Well I am happy for you then. But mine is not very efficient
It drinks about 13 litres for 100 km (i don't know to convert to your measuring units, if someone can help please do (i am too tierd to find a convertor on the net it's 1 o'clock in the morning here ). And that is insane where a litre of diesel is about 2$ that means that I have to spend an average of 26$ for each 100km (which is more or less 60 miles). A gallon is about 4.5 litres as far as I know. Opinions please?

18mpg. You should start a new thread about that rather than everyone getting this topic derailed about fuel consumption.

Point taken.
Here is the new thread:

http://www.peachparts.com/shopforum/diesel-discussion/201923-w123-engine-mod-post1641566.html#post1641566

I invite you all, especially ForcedInduction, gsxr, pawoSD and Craig to comment on that thread.

Thank you.

I agree, that's why I own 616/7 engines. Personally, I will give up some efficiency for a computer free existence.

i dont know about you guys... but i would love to have one of the new cummings under my benz's hood. makes 500hp over 1800 fp of torque and its rpm range is under 3k. it makes its max torque at 1800rpm. I wouldnt mind having that, even if its rpms are quite low. Now with that, you could do something about that. Mill the deck a crapload and drop in a shorter stroke crank, or shorter rods. enlarge the bore so you get the same power, and you have a higher rpm limit because your R/S ratio is now square, or close to it.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.

That Cummins also weights 3,000lbs.

Personally, I'd want the Mercedes OM629.910 engine... V8 diesel, twin-turbo, 314hp @ 3600, and 538lb-ft @ 2200... in stock form. I think it's a few pounds lighter than the Cummins.

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