Quote:
Originally Posted by Jeremy5848
The 6-cylinder engine is quite different from the five. The six cylinders are 'paired,' which allows the use of resonance techniques. You can't do that with five cylinders, which is why the 605 doesn't have flaps. Additionally, with five cylinders, getting reasonable smoothness becomes more important than a few horsepower.
In the factory's 1995 "Intoduction into service" manual, the resonance flaps are described along with a graph showing the difference with and w/o the flaps. I suspect it would require a dyno to show the effect—the text and graph didn't have any numbers attached.
The flaps change state at ~2500 and ~3500 RPM. I have added LEDs to my speedometer so I can see and confirm they are working. The 1996-97 engines in the W210 models also have flaps; I suspect a malfunctioning or disconnected flap in those engines would set a code. The 1995 W124 is spared that foolishness.
Jeremy
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Jeremy,
I'm all ears and that is one very convincing answer..
...however how do you go about 'balancing' six cylinders which share a common manifold with opposing cycles of induction??
The reason I ask is because this was something of great consideration when it came to water injection nozzle placement, how to feed all cylinders equally from a possible non central location.
Are you positive this is not some marketing blurb by MB, put it another way if you wanted to change the engine note due to lack of turbo what would be the easiest way (thinking trombone here)..
..retreats putting first leg into flame suit..
