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Hey guys I’m new to the w204 scene and found some threads talking about a twin turbo kit being made by eurocharged for the c63. I couldn’t find anything conclusive though and can’t find anything online. Is this still happening? I’d love to TT my m156 someday. I also saw some arguments about blowers being better etc. It’s about the turbo experience for me not just instant torque at idle. Let’s just enjoy what we like.
there is no easy way to turbocharge the M156 in the C or E body without extensive work or without having piping too small or hanging under the engine carriage. the M157 is a smaller engine and the M177 even smaller but also with that reduced size can fit a hot-v configuration for the turbos.
alternative methods to supercharge would be eliminate power steering, alternator, and ac compressors, but even then you are space limited due to the size of the engine. also at that point you'll run into issues of which the intake manifold is unable to hold the pressure of boost. the clamshell design and wiring throttle body wiring harness grommet will not hold boost very well.
If I remember correctly, EC actually stated the same thing before “abandoning” the project. Don’t quote me on it tho. Just a faint memory.
You also have to think of the m156 compression. The stock high compression requires different internals for a proper turbo m156. Which means $$$$$ for a engine build to lower the compression before you even think of getting a kit. If there was one. Which means old pistons must come out to say the least.
It’s been few years since I followed up on it, last I checked the engine build was done, kit was fitted and tuned on 6psi? Making right around 700RWHP.
stock internal M156 engines have been proven to push 800whp without breaking a sweat. i wouldn't worry too much as anything beyond the actual limits of the hardware will reside in tuning which when all is said and done can blow even a stock engine without power adders of any sort.
'04 E55 (Gone but not forgotten), '13 C63 P31 (RIP), another '13 C63 PP
Originally Posted by hachiroku
stock internal M156 engines have been proven to push 800whp without breaking a sweat. i wouldn't worry too much as anything beyond the actual limits of the hardware will reside in tuning which when all is said and done can blow even a stock engine without power adders of any sort.
lol...trust me that i've spent countless days and hours trying to figure out how to fit 2 turbos...if was easily possible i would have started the process of installation and tuning and possibly putting together a kit. sadly, it isn't that easy.
lol...trust me that i've spent countless days and hours trying to figure out how to fit 2 turbos...if was easily possible i would have started the process of installation and tuning and possibly putting together a kit. sadly, it isn't that easy.
There's enough room under the car. My friend has built a number of under mount setups for various cars when engine bays are tight or adding a big single to existing twins for compounding etc. One of his daily drivers is twin g25-660s mounted under the car making a little north of 800whp (limited by stock engine) on a v6
the issue wasn't stated that the turbos couldn't fit...you have no space for proper piping size, routing, or intercoolers liquid or air. also, the intake manifold will blow out with boost. a rubber grommet will not hold anything more than say 2-3psi. moving over to an SLS intake manifold will help with this concern, but......you take up the valuable space that could be used for liquid to air intercoolers which are space limited as it is.
I am toying with the idea, but I think you need a custom intake manifold ideally with the air/water heat exchanger built into it. And yeah real estate is pretty hard to come by under the hood but damn would it be amazing to get turbos on the m156. I’m going to be taking mine apart here shortly to do headers and exhaust, suspension and delete a bunch of “luxuries” out of the front of the car and hope to find some room for next winter fitting some turbos
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
All you have to do is be brave enough to relocate the ABS unit. Maybe the coolant reservoir too. Plenty of room up front either side behind the headlights for turbos. In fact that’s the ideal location because routing charge air pipes is shorter and easier for a front mount.
the issue wasn't stated that the turbos couldn't fit...you have no space for proper piping size, routing, or intercoolers liquid or air. also, the intake manifold will blow out with boost. a rubber grommet will not hold anything more than say 2-3psi. moving over to an SLS intake manifold will help with this concern, but......you take up the valuable space that could be used for liquid to air intercoolers which are space limited as it is.
we just have to chalk this up as race car only.
Those are just minor issues to solve. The turbos are the most important because they are one item that require a specific location/orientation and they are the bulkiest part. As for the rest, they are the same problems you solve with every custom turbo build. You fabricate what you need as you go and there is always more space than you think. I've seen dozens of these first hand over the years so I know what is possible. But for the average shop/car owner that only bolts on parts I agree it would be very difficult.
FWIW we still have it, the owner of the car actually is a franchise partner now and still has it. He was actually just sending some parts out to make more power so stay TUNED for that one.
You are also correct anything over 6lb will blow the manifold (and did) But, when you have CNC machines in the company that's an easy fix.
We indeed didn't market it as the cost vs sales potential isn't really there. It is a lot of work to not only build and market, but a good amount on the customer to install. But....we know how to do it and could if anyone is truly interested
For anyone even remotely thinking of doing it, isn’t the 11.3:1 C/R of the M156 just way too high, or at least not ideal for boost turbo? In my opinion it’s high enough where e85 would be absolutely necessary. Does anyone know the C/R on the EC build? I highly doubt they stuck with 11.3:1.
Last edited by Slow_c63; Apr 17, 2021 at 06:33 PM.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
nowhere to get a TT then huh?
