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Just watched a YouTube Video where a guy named SERGIE (W205 Upgrade 1) plugged a port on the boost pipe exiting the turbo but before the water cooler box. The port runs from the boosted air pipe back to ambient air thus providing a designed leak path therefore restricting the amount of pressure into the throttle body. Effectively a detune.
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He claims increased throttle response and power ( a $5 dollar MOD).
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Has anyone tried this?? Your Thoughts. Anyone measured the the amount of loss. Why would MB do this?
Good ol' Segie might know the essentials of turbo leak in your charge pipe, but I'm not sure I'd trust his knowledge of emissions systems. I'm certainly no expert, but that to me looks like a purge pipe associated with the emission system. Removing that line could well cause you to run foul of any EPA laws. Ventilation and vacuum lines on modern cars are a bloody complex business, especially on turbocharged engines. If you reckon you know better than MB engineers, go for it. Other than that your $5 fix could turn into something far more serious and costly down the track.
I don't think it is an emissions system at all. Looks like more of an over-boost protection not allowing the engine to exceed the conservative parameters established by the MB engineering team to meet long term ownership goals.
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Or possibly detune for future MY change hp increase. Regardless -- someone will certainly be checking this out -- Like a reply from BMS (Terry) would be interesting.
I am amazed by the lack of response to this thread. Time to go elsewhere!
I guess my concern with it would possibly creating a lean mixture. Without knowing your afr curve or logging knock you really don't know what's going on. Suppose you raise boost pressure and/or volume by doing this. How would you know if you have the correct amount of fueling for that increase?
That passive aggressive attitude probably won't encourage anyone to help.
I would say that you have had few responses simply because nobody has a definite answer. I doubt there are any automotive engineers on this board, so you are simply asking for speculation. People have posted some objections or concerns and you have responded... What else are you expecting?
When I had a VW the VWVORTEX site was absolutely amazing -- the data and the info contributed by the forum was incredible.
Then I switched to BMW -- not quite as useful from a technical stand point but substantial . Both VW & BMW more of a tuning community with DIY guides and technical advice that were worthy of publish.
Here - it is more of who's got the newest and best model. Not so much a technical crowd.
Is it not ok that I go elsewhere to find credible data like the N54tech forum -- that yes support Mercedes tuning?
When I had a VW the VWVORTEX site was absolutely amazing -- the data and the info contributed by the forum was incredible.
Then I switched to BMW -- not quite as useful from a technical stand point but substantial . Both VW & BMW more of a tuning community with DIY guides and technical advice that were worthy of publish.
Here - it is more of who's got the newest and best model. Not so much a technical crowd.
Is it not ok that I go elsewhere to find credible data like the N54tech forum -- that yes support Mercedes tuning?
Just a different crowd.
Much larger crowd on the VW site. I suppose the Toyota camry site generates quicker responses too. Gee, wonder why that is?
Much larger crowd on the VW site. I suppose the Toyota camry site generates quicker responses too. Gee, wonder why that is?
ditto!
The only forums worth something around here are the AMG forum.. only typically E55 W211, C32, C55 and C63 and new W212 platform
I read the C205 post cuz my wife's car a decent car and would like to see simple intake mods (like the one posted) or simple exhaust mods. But the reaction to anything modded is typically negative.
To the poster: Just data log and see if you boost increases pre and post. Check your IAT's and if you can your timing degrees. Hope to see more people like you.
Just in case anyone finds this thread, this isn't really a "good idea" from a warranty standpoint (Yes I can say that, I work as a diag Tech at an MB dealer). That pipe is part of the ridiculously over-complicated and problematic CCV system this engine is burdened with. The line is connected to the charge pipe near the front of the valve cover. It then runs to a "T" fitting, one side runs to the CCV system's vent valve that's under the charge cooler near the intake manifold. The other end of the "T" split is connected to the "fresh air" intake pipe between the airbox and turbos' compressor inlet. If you block it off, it WILL interfere with ccv operation. I doubt it will be in a good way.
What the youtube vid poster was feeling, is probably a small boost spike caused by the plugged vent line on the charge pipe, due to the missing "Calculated Boost loss" that the DME is expecting. The pic is from my 17' C300 sedan (Canadian ver.). Since the boost pressure sensor is after the charge cooler and this is a hardware mod (existing hard part modification, no software or sensor trickery), the DME would most likely correct the running parameters accordingly. Or get all huffy and throw a CELL/LIMP MODE if the spike is big enough or causes other "out of normal operation" parameter adjustments to be required by the DME. Keep in mind that control unit EEPROM data is how TAS (MB technical support/Warranty ****'s) determine if the vehicle has been run outside of the design parameters. Hence how MB can detect whether a vehicle is currently or has ever been run with modifications even if the DME has been aftermarket flashed back to factory or had the faults cleared.
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