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I have a 2006 c320cdi 95000 miles.
Cat internals removed.
Swirl flaps removed.
EGR has been blanked at the intake system.
Recently installed a hybrid turbo, gt2056v with a gt23 turbine from a C30amg paired with a 65mm billet compressor wheel. Therefore turbo is now a gt2365v.
Recently took the car to a reputable tuner, when tuning on the dyno the pre-turbine exhaust back pressure was very high, only allowing 280bhp and 450lbft of torque. The turbo was built by a reputable company, who assured me id see around 350bhp. Additionally these exact internal on a BMW330d regularly see 550lbft and 370bhp, I know the BMW runs a slightly different gt2260v as standard, but the turbo company are convinced it should be working effectively in my housing and have seen it work effectively on other engines.
Does anyone on the forum have any experience tuning the om642 engine that may be able to shed some light?
Welcome to the forum.
Please fill up your profile, so we know what country you are in and what you drive without asking each time.
I am afraid you might be first one coming to the forum with such dilemma. Most members here are from N America, where tuning is not popular as in other countries.
We just spend money on AMG models when we want high performance.
Few of us did tune MB diesels, but that mostly has deleting DPF in mind and FYI the 642 engine did not make it here till 2007.
Thanks,
I have filled in my key information.
Ok thanks for the input, lets hope there is somebody with a little experience with the OM642.
Many thanks,
Adam
Van egy 2006 c320cdi 95000 mérföld.
Cat belseje eltávolítva.
Az örvénylapok eltávolítása.
Az EGR-t a beszívó rendszerben eltakarították.
Nemrég telepített egy hibrid turbót, gt2056v egy gt30 turbinával egy C30amg-ból, amely egy 65 mm-es billet kompresszor kerékkel volt felszerelve. Ezért a turbó most egy gt2365v.
Az utóbbi időben egy jó hírű tunerbe vitte az autót, amikor a dinamikus hangolásra az előturbina kipufogó nyomása nagyon magas volt, csak 280 bhp és 450 lbft nyomatékot adott. A turbó egy jó hírű cég által épült, aki meggyőződött róla, hogy körülbelül 350bhp-t lát. Ráadásul a BMW330d rendszeren belül ezek a belső részek rendszeresen 550 lbft és 370 bhp-t látnak, tudom, hogy a BMW alapfelszereltség szerint kissé eltérő GT2260v-t fut, de a turbó cég meg van győződve arról, hogy hatékonyan kell dolgoznia a házamban, és látta, hogy hatékonyan működik más motorokon.
A fórumon bárki tapasztalattal rendelkezik az om642-es motornak a tuningolásával kapcsolatban, amely némi fényt kelthet?
Nagyon köszönöm,
Adam [/ quote]
Hello,*how much boost pressure you run now? .. and Vnt ring*changed to the turbo? ... the gt2056v turbo orig small Vnt ring..
Hi,
thanks for your reply, i have had a look at your E-class build.
The car is currently running 1.5bar of boost, I am unsure about what vnt was used, I shall ask the company that built the turbo.
Thanks again.
Last edited by saunders123; 12-26-2018 at 04:17 PM.
Vnt ring*changed to the turbo? ... the gt2056v turbo orig small Vnt ring..[/QUOTE]
the turbo company said it has the standard VNT, but they seem to think it is ok. I have a before and after flow chart of the turbo at home, i shall take a photo later
Vnt ring*changed to the turbo? ... the gt2056v turbo orig small Vnt ring..
the turbo company said it has the standard VNT, but they seem to think it is ok. I have a before and after flow chart of the turbo at home, i shall take a photo later[/QUOTE]
I understand ... this is not really good...the exhaust gas in the vnt ring come to turbine shaft .. if first it is not replaced... exhaust back pressure only slightly decreases...
there is bigger (gt2260v etc ..) I do not know why not changed...
The turbo pressure good...it can not be too high..because the engine may be damaged..
Unfortunately, the om642 engine It's hard to tuning....
Hi, once again thanks for your reply. Turbo before and after modification. But this is just on a flow bench so there is no real pressure.
im going to do some data logging on the road in the next week or two. This way I can go to the turbo company with graphs and evidence to back up my claims.
thanks,
Adam
2010 Mercedes GL450; 2000 Mercedes ML55 AMG; 2016 VW GLI SEL Stick!!!
Originally Posted by Shadowbourne
Hi guys. I want to make a gift to my grandpa for him birthday. I choose car for him. Help please with a choice. What would you advise? If my topic does not fit the topic, please move to the desired section. Thank you very much.
budget ❓location ❓
Opa's preference for suv, wagon or sedan?
4th gear pulls, done a little data logging ended up with this.
The veins are fully open, but the pre turbine EBP keeps increasing. So the turbo company should have used a bigger VNT, at least thats my take on it?
Yes ..the exthaus limiter the VNT ring .. Hight exthaus temperatur ..and back pressure .. which is short the life of the engine and turbo.. and of course less performance ...
but it should be noted..which will not know as much performance...like BMW 30D engine.. like turbo like you..(Better VNT) 3.0d 2.2 - 2.4 bar turbo pressure make ca. 340-370 ps
but OM642 can't handle it (very dangerous) so much turbo pressure ,, BMW engine interior parts..others OM642 ..
Unfortunately the data logging I have access to outside of work is not as good as what I am used to. I have been trying a different software called OBDwiz, the data logging function is better but variables are not all readily available so now trying to set up custom PID's. Anyway I think at around 2400rpm to 2800rpm I am now hitting some sort of torque limiter. Airflow through the engine has been increased by more than I though by just changing the exhaust. Shows how restrictive the standard on New vs old New vs old
Finally got round to doing some intercooler and pipework this week. The first photo shows how restrictive the standard pipework is in places. All custom 63mm pipework as there is nothing readily available, throttle body delete all held together with some heavy duty clips. I haven't cut the bumper yet, if the boost temps are still a bit high I shall modify the bumper to allow better airflow. Will get some data logging done when the roads are quiet.
Nice work on the piping! The intercooler has a good size. I have a CLK320 CDI, box tune and Treadstone TR6 intercooler, fits perfect. Still too small, IMO. Your´s look better.
There might be no gains with the bigger piping especially before the intercooler. Remember the turbo outlet is much smaller and the point of restriction. As far as i remember only 45mm or even less (inner dia). .
BTW 2" is good for about 400 - 500 rwhp. 2.5" is huge.
Steven
Berlin Germany
I used 63mm pipework because thats what the intercooler end tanks were. Graham Bells forced induction book talks about pipework size and so does Mishimoto's guide to choosing an intercooler.
50mm pipework would have probably been ok, the larger pipework will mean a drop in air speed through that part of the system, but i'm not too bothered.
Boost temps are about 5C to 15C above atmospheric which is not ideal but not bad considering the size. Compressor out temps are peaking at 175C.
Mishimoto intercooler yours?
Btw. Back to your first postings. I suspect the backpressure might be still high because of the small tiny turbine housing. changing to a bigger turbine wheel probabely makes it better but is only one part of the story.
Steven
Berlin Germany
I have a 2006 c320cdi 95000 miles.
Cat internals removed.
Swirl flaps removed.
EGR has been blanked at the intake system.
Recently installed a hybrid turbo, gt2056v with a gt23 turbine from a C30amg paired with a 65mm billet compressor wheel. Therefore turbo is now a gt2365v.
Recently took the car to a reputable tuner, when tuning on the dyno the pre-turbine exhaust back pressure was very high, only allowing 280bhp and 450lbft of torque. The turbo was built by a reputable company, who assured me id see around 350bhp. Additionally these exact internal on a BMW330d regularly see 550lbft and 370bhp, I know the BMW runs a slightly different gt2260v as standard, but the turbo company are convinced it should be working effectively in my housing and have seen it work effectively on other engines.
Does anyone on the forum have any experience tuning the om642 engine that may be able to shed some light?
Many thanks,
Adam
Hi, I'm new member here. I have a LHD 2007 W164 ML320cdi in the USA and RHD 2008 W164 ML280cdi in Thailand. Basically they are the same vehicle engineering-technology wise. In early 2019 I had my 320cdi ecu tuned/remapped to ~290hp and it still runs strong. Around mid 2019 I first had 280cdi tuned to 290hp and a few months later tuned to 300+hp. I have driven both extensively for 10K miles and 30K kms respectively in the past couple years. In September 2020 I upgraded my ML280cdi to a hybrid turbo. It was specially tuned to 320hp, max boost pressures at 2.9bar. (You will need a new MAP sensor for this.) I also did the same to a customer of mine--he also has RHD W164 ML280cdi. All I wanted to say is, the OM642 engines are strong and can handle all this. More over, I still keep other parts stock, like radiator, intercooler and so on. But I have cdi sport exhaust from Germany on my ML280cdi. I didn't own many cars in my life but I dare to say this is the best bang for the buck car/SUV I've ever had. Cheers!
Nice work on the piping! The intercooler has a good size. I have a CLK320 CDI, box tune and Treadstone TR6 intercooler, fits perfect. Still too small, IMO. Your´s look better.
There might be no gains with the bigger piping especially before the intercooler. Remember the turbo outlet is much smaller and the point of restriction. As far as i remember only 45mm or even less (inner dia). .
BTW 2" is good for about 400 - 500 rwhp. 2.5" is huge.
Steven
Berlin Germany
I have a 2006 c320cdi 95000 miles.
Cat internals removed.
Swirl flaps removed.
EGR has been blanked at the intake system.
Recently installed a hybrid turbo, gt2056v with a gt23 turbine from a C30amg paired with a 65mm billet compressor wheel. Therefore turbo is now a gt2365v.
Recently took the car to a reputable tuner, when tuning on the dyno the pre-turbine exhaust back pressure was very high, only allowing 280bhp and 450lbft of torque. The turbo was built by a reputable company, who assured me id see around 350bhp. Additionally these exact internal on a BMW330d regularly see 550lbft and 370bhp, I know the BMW runs a slightly different gt2260v as standard, but the turbo company are convinced it should be working effectively in my housing and have seen it work effectively on other engines.
Does anyone on the forum have any experience tuning the om642 engine that may be able to shed some light?
Many thanks,
Adam
You actually lost torque compared to the stock turbo. You need to give it more fuel and increase your boost pressure to compensate for the change in airflow and behavior. You can easily do a Stage 1 (safer to start) or Stage 2 ECU remap which will get you close to the numbers you're expecting to see.
12-17-2018, 12:29 PM
