EvolutionDrock

After spending countless hours of researching information about manufacturer and size of the turbocharger unit on the c250 cgi. I came to the conclusion that the turbo is made by the Borg-Warner. It's a
K03 turbo. I also believe it's the same turbo used by 2002-2005*Audi A4 and
2002-2005* VW Passat 1.8T Engines. This is OEM part No.:058145703J. Looking at the pictures it's identical to the turbo located in the c250 cgi.

AusMB87

except that the factory turbo is molded into the manifold rather than a bolt on.

http://www.ebay.de/itm/Turbolader-Me...item3ce2366102

Knightmare69

Why didn't you just remove the intake pipe and see the manufactures stamp? Reason I mention this is that you're not the first to question the CGi turbo as a good many others and I have been trying to find information, solid information. However there is much lacking in that department. I myself confirmed that the C200 turbo is made by IHI and is a AL065 series turbo, if what you're saying is confirmed then that would explain the power difference between the 2 models.

AusMB87, most turbo's nowandays are done this way, the problem in interchanging between platforms would be the actual position of the turbo as I believe the Audi/VW's have the turbo mounted more center of the manifold and ours is more forwards.

AusMB87

That and I highly doubt the manifolds would be interchangeable. I doubt there is much chance of a decent turbo upgrade short of custom manifold and, well, pretty much custom everything. By the time we look at that work, the necessary computer, injector, FMIC, engine internals etc upgrades required....well, it would be cheaper to sell up and buy a 350 or something.

As it stands, a second hand c63 can be had in aus for around 70k. I doubt sinking 35 grand into my C200 would be enough to match that performance increase....

I am hesitant to go anything larger than a factory optioned turbo, for a lot of reasons. In the meantime, I'll be keeping an eagle eye on the german ebay for a a45 turbo and injectors

Knightmare69

Well there is the C250 turbo we discussed and if the OP is right and the turbo is actually a K03 then I believe it would be a decent upgrade for the C200. Also, I looked at the CLA/A 250/45 turbo, I don't think it will fit, it's a completely new engine and I think the turbo position on the manifold is also not optimal for our CGI, Also I think there are fitment issues with the actual turbo. If I recall, connections for the DV and coolant lines are much different.

AusMB87

I agree the 250 turbo will be a great upgrade for our 200s. I just don't think there is much room past that without serious modification.

Knightmare69

Well if I can find a used one I'm all over it, just wondering if I'll really need injectors also.

AusMB87

There are many used ones on the German ebay (I emailed you a link).

With injectors 'need' and 'benefit from' are not the same answer :-)

Knightmare69

Yea I saw, I also priced one brand new from my parts wholesaler..........OMFG it's pricey. But I did manage to confirm that it's also an IHI unit though not sure if it's the same series as the C200. So...........this begs the question, are we sure the turbo is different even if it has a different part number? It might just be because the C250 was introduced on the FL model so it warranted a different part number, after all, through our combined research, you and I have eliminated any part differences between the models for various parts.

AusMB87

If they are identical the part numbers will be also. They would just supersede the older parts part number.

Additionally, the carlsson c-tronic creates different power output for 200 and 250 vehicles, even though it's the same carlsson unit, so there must be hardware differences. It doesn't make sense for the internals to be the only difference. The throttle bodies and exhaust are identical so that rules out everything but injectors and turbo really. Unless it's the cam. That could be worth investigating

EvolutionDrock

Could you email me the link to the German ebay listing for the a45 injectors and turbo.

AusMB87

I only saw c250 ones mate. I think it will be a little while before we see a45 stuff on ebay

Knightmare69

Also, don't forget, if the A45 turbo is mounted in a different position on the manifold it may not be ideal for us to use.

I haven't been able to find any info on the cams so far so I can't say for sure. It may also come down to what we talked about before which is the base map, however, I assume that most piggybacks for the C200 "tune" to something close to stock C250 figures and yet I can still get walked by a stock C250.

AusMB87

My Carlsson unit is meant to give me 220bhp and 360nm which is well over a C250. I haven't had the opportunity to test it but it feels faster than a 250. (not to mention that the ESP struggles with it now)

If there are absolutely no differences other than base mapping, then a piggyback would be capable of producing the same figures out of a 200 as a 250.

EvolutionDrock

I've found some interesting information:

http://www.mbclub.co.uk/forums/engine/88500-complete-m271-engine-thread-revised-updated.html

AusMB87

That is a pretty detailed thread! good find.

Unfortunately, it is aimed at the Kompressor engines so it won't necessarily cross over to ours. Still, interesting to think we could grab some con-rods out of an older, lower compression M271 to drop our compression ratio. Then drop on a bigger turbo

Knightmare69

We're still missing the most important part, ECU tuning. Until an accredited company is willing to spend the time to hack the Siemens ECU, most of this is still worthless sadly. The piggybacks MAY be able to handle a C250 turbo swap (if it's actually a different IHI series) but like we discussed, it wouldn't be to the full potential.

EvolutionDrock

More interesting info regarding m271 evo engine. Text is in English but the site seems to be from China. You can change pages.

http://wk.baidu.com/view/3a076b03de80d4d8d15a4f5c?pcf=2#page/16/1409194184

Knightmare69

Link doesn't seem to work.

Edit- I managed to find it but you need an account to DL the information. Also the one I'm looking at is in Chinese

EvolutionDrock

http://wenku.baidu.com/view/3a076b03...8d15a4f5c.html

http://wenku.baidu.com/view/7a0ad520...ff7050b82.html

EvolutionDrock

Found a pdf file in german

https://autoeoe.com/mercedes-benz/motor/m271/

AusMB87

Nightmare, this is the recall for oil in the turbo that I was telling you about.

EvolutionDrock

I recently went for an oil change to the dealership, and was told that the
o- ring on the turbo oil line was leaking. They replaced it under factory warranty. I'm not sure if there is official recall bulletin.