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Hey all, I have an ‘08 E63 with the standard Y pipe. I’ve noticed that the design changed later with a balance box in the middle of the Y. I’m assuming it’s for some air balance, or noise reduction?
Would it be an upgrade to switch to the newer style?
Thanks!
The airflow entering the Y-shaped intakes on the 2008 W211 E63 plenum is already balanced, thanks to the mass air flow meters that regulate it.
This system has been part of the vehicle since its production, ensuring optimal performance without the need for modification.
Given its proven reliability over the years, there is no reason to replace the existing intake setup.
The airflow entering the Y-shaped intakes on the 2008 W211 E63 plenum is already balanced, thanks to the mass air flow meters that regulate it.
This system has been part of the vehicle since its production, ensuring optimal performance without the need for modification.
Given its proven reliability over the years, there is no reason to replace the existing intake setup.
Thanks for the reply. Using your seintment would leave one to ask the question... Why did mercedes, AMG later change the 'Y' intake design???
There's a good thread on this Y-Pipe in the W204 AMG sub-forum.
The earlier ones are notably larger / flow more air. On those cars, there is a metal vacuum canister bolted to the side of the engine instead of the plastic one that's integrated into the newer design.
Hard to find good info on what it's there for, but the most interesting explanation I came across was that it was related to the actuation of the plastic flaps inside the intake manifold.
I'm going to install the larger Y-Pipe this Spring (found a vacuum reservoir for a different platform that might fit in the engine bay).
That appears to be a "Helmholtz resonator". Used to cause constructive interference to boost intake pressure at particular rpms. Early Miatas had a rather large one mounted to the plastic intake pipe.
That appears to be a "Helmholtz resonator". Used to cause constructive interference to boost intake pressure at particular rpms. Early Miatas had a rather large one mounted to the plastic intake pipe.
Do you think there's any harm in running a larger resonator than the factory one?
Not intentionally, mind you, just the ones I'm finding that could fit in the engine bay seem to be larger than the factory one.
Do you think there's any harm in running a larger resonator than the factory one?
Not intentionally, mind you, just the ones I'm finding that could fit in the engine bay seem to be larger than the factory one.
Without running fluid dynamic calculations on a computer or actually testing on a dyno I couldn't tell you. Changing the volume changes the resonant frequency which affects which rpm the effect is found. In general, the larger the volume the lower the resonant frequency. Runner length also affects the resonance.
Without running fluid dynamic calculations on a computer or actually testing on a dyno I couldn't tell you. Changing the volume changes the resonant frequency which affects which rpm the effect is found. In general, the larger the volume the lower the resonant frequency. Runner length also affects the resonance.
Thank you. Runner length would be a constant since the IM isn't altered, but in your opinion is there any correlation between the amount of air flowing into the IM and the size of the resonator?
In practice, what I'm trying to determine here is whether increasing flow via ROW air box lids and the larger Y would be impacted (in any way) with a larger resonator.
In my opinion (it's free so take it for what it is worth) I would go with the air box lids with larger Y and not the larger resonator. The resonator is intended to assist air into the cylinders (greatly(!) simplified) at specific frequencies. This is usually tuned for a somewhat narrow range that may suffer from a torque dip without the resonator. It is possible, however, that the resonator may hinder the rpm range of interest rather than assisting it. Again, dyno testing would be way to go. If a vendor can show evidence of that, go for it.
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