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Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion > Diesel Performance Tuning

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  #1  
Old 12-30-2008, 12:05 PM
KarTek's Avatar
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Join Date: Jun 2007
Location: Bahama/Eno Twp, NC
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OM606 ST Project - The Fueling Side of the Equasion

Well, I hadn't planned on buying the fuel parts for my project yet but I had an opportunity come up and I took advantage of it thanks to a very helpful gentleman.

So here'a a list of the parts I have:

6 experimental 3 sided nozzles
6 custom cut delivery valves
6 7mm elements
12 springs to try out for the best combination

I still need to do a baseline dyno on the car and then the first parts to go in will be the nozzles followed by the DV's and then the elements.

I'll see how the computer reacts to each part in turn and then I'll look into getting the program tweaked for best performance.

Don't expect this to happen soon. Probably within a month for the nozzles and 3-4 months for the other parts. I have to synchronize the bigger fueling mods with my induction project.

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  #2  
Old 12-30-2008, 01:59 PM
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Where can you buy those 7mm elements???
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  #3  
Old 12-30-2008, 10:21 PM
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Do you have a pump rebuilder willing to install and calibrate oversize plunger/barrels? I'd definitely be curious to see how the computer reacts to more fueling. It sure would be nice if MB had an "on-the-fly" computer program like the VAG-COM units the VW TDI guys use to make laptop adjustments while driving.
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Old 12-31-2008, 11:13 AM
KarTek's Avatar
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Location: Bahama/Eno Twp, NC
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The internals in this pump are very simple so I'm not sure exactly what would need to be calibrated with the larger elements. The rack is controlled by an electromagnet which receives a PCM signal from the computer and that is pretty much all.

As far as where this stuff came from, at this point, since it was an individual that helped me get it, I'm not comfortable giving out his information.
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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Last edited by KarTek; 12-31-2008 at 02:29 PM.
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  #5  
Old 01-01-2009, 11:40 AM
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The 7mm elements for the pump are commonly available from Myna Diesel in Finland, last I heard they were about $50 EUR each. The other items mentioned above are custom fabricated... although it wouldn't hurt to ask Myna if they have experimented with something similar.

Please let us know when you have the baseline dyno run complete! I'd love to see the dyno graph for a stock 606.962 engine. Remember to disconnect both the Bowden cable (if present) at the throttle linkage, and kickdown solenoid at the tranny, prior to the dyno run. Experiment with this on the street, make sure you can give it full throttle in 3rd gear starting at around 20mph (~2000rpm) without a downshift. You need the car in 3rd gear at WOT, from approx 2000rpm to redline, for a proper dyno pull.

Click here to see a video of my first dyno session (warning - 18MB download). This dyno shop went out of business shortly afterwards, so I had to re-dyno at a different shop to get a new baseline. I don't have the videos posted yet from the second shop... the new shop also has a DynoJet, but a larger/nicer dyno. I also have done testing at the dragstrip, and 0-100 tests with an AP-22 performance meter, so I have lots of baseline data.

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  #6  
Old 01-24-2009, 08:14 PM
KarTek's Avatar
<- Ryuko of Kill La Kill
 
Join Date: Jun 2007
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Just a small update here: Today I ordered the parts for my pop tester. When I finish it, I'll get to work assembling the injectors. Also, I'll probably do my baseline dyno some time this week.

It's quite convenient having the shop only 10 min. from the office...
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Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250
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  #7  
Old 09-11-2009, 02:55 PM
KarTek's Avatar
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Join Date: Jun 2007
Location: Bahama/Eno Twp, NC
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Quote:
Originally Posted by tomnik View Post
Evan, middle of October! Then I hope to have bench numbers also.
It should be more than just a replacement.
Do you want to stay with your 606 IP or you jump to 603?
All the larger elements will need adjustment on the IP.
A 606 IP "under control" with laptop on the passenger seat would be perfect.

Tom
Tom, I'll be keeping the 606 pump. Hopefully, with a custom tune on the chip, it will run perfectly!

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Last edited by KarTek; 09-11-2009 at 03:01 PM.
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