Intake chambers/resonators

[lmoengnr]

The plenum is really only there to provide a place for the intake charge air to hang around while waiting to be drawn into the engine. It just acts as an equalizer in pressure for each intake runner.

Like a pneumatic reservoir.

 

[commodore665]

Yes, absolutely. It is not possible for an intake reversion wave to make it back into the intake piping. It would have to overcome the negative pressure in the next intake cycle and get past the throttle body as well. it would be like blowing bubbles into a fan and expect the bubbles to make it through the fan and out the other side.

Or another analogy would be pissing into the wind.

Or farting into a force 10

 

[siniSSterbloke]

So do you think the sole purpose is for reduction/moderation of induction noise ?

100% what its for.

 

[Ron Burgundy]

I swapped stock setup on my SS with HSV version which is completely different. No difference in induction noise that I can tell.

https://forums.justcommodores.com.au/threads/vf2-ss-black-edition.257150/post-3118234

 

[Ron Burgundy]

https://www.mishimoto.com/engineering/2020/09/air-intake-myths-part-2/


https://www.mishimoto.com/engineering/2019/10/jeep-wrangler-intake-2018-rd-pt8/

It appears that the chambers on intake systems do affect engine performance and they are not only about sound...