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W163 ML270 CDI with slight upgrades
baldur Offline
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#1
W163 ML270 CDI with slight upgrades
So I purchased a ML270 CDI last year for ECU development work.
[Image: 2020_04_21_13_19_59.sized.jpg]
Extremely slow, 160 horsepower and stuck in limp mode with an EGR fault. Drove it just one day before replacing the Bosch ECU with my own design DID1 ECU. Big improvement in throttle response and power.

[Image: 2020_03_14_20_18_45.sized.jpg]
Next came a turbo upgrade, a GT2359V off an OM648 engine modified to fit, well worth upgrading to an electronic actuator, vacuum is just the wrong way to control a turbocharger, direct electronic control is so much more precise.

[Image: 2020_03_28_16_40_20.sized.jpg]
Water/methanol injection, would never tune a diesel without it.

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The stock high pressure pump was a bottleneck, unable to keep up with even the stock injectors. CP3L110 pump off a V8 Mercedes to the rescue.

[Image: 2020_11_28_16_54_22.sized.jpg]
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The stock intercooler was no good whatsoever, looked big but didn't cool worth a damn. Upgrade was required.

Original 0-100km/h specified 11.4 seconds. Now does it in 5.9 seconds, good daily driver. Will likely change the turbo again to make it a little faster.

https://www.youtube.com/watch?v=yh5yKbFx8ag
Baldur Gislason

12-21-2020, 07:40 AM
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M-ic Offline
W201 OM605/722.6 fully electronic
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#2
RE: W163 ML270 CDI with slight upgrades
Amazing stuff!!! Really getting the potential out of that ole 5 banger…. :-D
01-04-2021, 06:01 PM
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dcm Offline
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#3
RE: W163 ML270 CDI with slight upgrades
Great write up and information!! I'm currently working on my own ML270, are you able to modify the original ECU?
03-30-2021, 07:15 AM
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dcm Offline
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#4
RE: W163 ML270 CDI with slight upgrades
Have you upgraded injectors to 'C30' spec?
03-30-2021, 07:15 AM
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baldur Offline
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#5
RE: W163 ML270 CDI with slight upgrades
(03-30-2021, 07:15 AM)dcm Wrote: Great write up and information!! I'm currently working on my own ML270, are you able to modify the original ECU?
No I will not touch the original ECU, it's not able to do the things I want to do.
Baldur Gislason

03-31-2021, 08:55 AM
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baldur Offline
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#6
RE: W163 ML270 CDI with slight upgrades
(03-30-2021, 07:15 AM)dcm Wrote: Have you upgraded injectors to 'C30' spec?
No and I don't think I will, I don't think it's a worthwhile upgrade as I am planning to fit a bigger turbo that will require more fuel than the C30 injectors can deliver. With my current setup using the GT23V turbo the C30 injectors would be an improvement but I am still running the stock injectors, and I can get away with it because the methanol injection makes up for the lack of fuel flow.
Baldur Gislason

03-31-2021, 09:05 AM
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Grecy Offline
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#7
RE: W163 ML270 CDI with slight upgrades
Nicely done!

Is that an OM613?
Which is more-or-less a 5-cyl OM648, right?
Do you know if there is a rear sump for that engine?

Thanks,
-Dan
(This post was last modified: 06-08-2021, 12:59 AM by Grecy.)
06-08-2021, 12:57 AM
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baldur Offline
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#8
RE: W163 ML270 CDI with slight upgrades
This is an OM612, which is a 5 cylinder OM613.

There are some rear sumps that fit. Sumps are interchangeable between this engine and the OM602/605/647
Baldur Gislason

06-11-2021, 04:28 AM
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