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  #1  
Old 04-04-2012, 02:04 PM
oldsinner111's Avatar
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Talking m104 resonance valve in intake

I read on diesels to gain power they remove this valve.Has anyone done so for a m104?

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Old 04-04-2012, 02:15 PM
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i helped my friend to swap 3.2 m104 to w201, and there i didn't connect antiresonanse valve.... i don't know if the accelerations were made by it's weight, but the car was really powerful
here is some vid
https://www.youtube.com/watch?v=AoL-LbFqNRE

it was very low budget car, but i couldn't catch the laptop when we tuned it

also in m104 3.0 24v there are strong resonanse phenomenoms, which help to fill the cylinders... it is described as passive boost called WI-BU. i fighted with strange mapsensor readings and pressure drops on fuel rail coused by map fluctuations with ori intake manifold... in kejetronic pendulum like flow meter has greater inertia, so this fluctuations don't affect it so much.... with mapsensor it is problem, but it can be easily solved
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Old 04-05-2012, 03:02 AM
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I think this valve limits noise from intake.Diesel owners remove and get more power.I know that a 99 intergra you replace intake manifold with aftermarket.Ours is on top of intake secured by allen bolts.
Just found part it called a air speed idle valve,guess you can't mess with it.Looks so restrictive
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Last edited by oldsinner111; 04-05-2012 at 03:13 AM.
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Old 04-05-2012, 08:18 AM
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That's not there to limit noise, it is there to boost low RPM torque when it is in one position and boost top end power when it is in the other position. Your big heavy W140 needs that low end torque boost. You can't be hitting that N2O button all of the time to make up for the loss in low end torque that you will surely suffer if you mess with that valve's operation. That will quickly get expensive. Just leave that valve alone. Honestly, I've been whining that our M119s don't have those, and here you want to disable yours!
Regards, Eric
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Old 04-05-2012, 10:09 AM
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Thanks Eric always looking to improve performance. PS. My w140 is a small compact to me,compared to cars from long ago.
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Old 04-05-2012, 12:06 PM
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When comparing apples to apples, 2 valve heads tend to outflow 4 valve heads until about 4000 RPM. The resonance valve helps level the playing field for the 4 valve head by better matching the intake resonance frequency to the engine RPM. By comparison a static intake will only have one RPM range in which the resonance will help move air into the cyl.
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Old 04-05-2012, 01:11 PM
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OK learned something about after market Integra intake.It flows better at top end,than stock.
So I like my grunt at low end to.

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