Hay guys

On the third gen magnas we have a couple of intake resonators. Ive been doing a little bit of reasearch and lots of people have said yes they do help quite down the intake system. But also they help acceleration power be more liner. A guy said he only got 1-2hp gain from removing the resonators but he prefered his power band with the resonators on. Has anyone got any input on this or our cars?

Cheers kurt.

I don't believe it would make a difference either way.

They where only there to quieten the intake noise and don't make a difference in performance whatsoever

They where only there to quieten the intake noise and don't make a difference in performance whatsoever

There was a thread on here a couple years ago. I can't quite remember. But they were saying something about more low down torque with them in.

IN MY OPINION:
FACT: resonator is to quieten the intake noise by absorbing harmonic frequencies.
THEORY: the resonator(s) provide a little bit of extra air for sudden throttle openings, meaning there is less restriction as there is more air available. BUT once the throttle stays open, it introduces a restriction via turbulence. So by removing resonators, you gain a little power, but lose some throttle response. If the ECU was tuned for sudden throttle openings, everything would be OK, but if not, the air sourced from a resonator (only a small %age) would not be read by the air flow meter, then immediately after when the resonator expands slightly and resumes it's normal volume, the AFM will see more air than what goes into the engine - I could imagine this causing a bit of surging unless the ECU handles it (ie: goes rich on sudden throttle).

Still in my opinion - replacing all of those corrugated tubes and bends and resonators with some smooth walled pipe in as direct a route as possible would improve air flow, increase power and increase induction noise. All of which are benefits to me :) Only potential issue is resonant timing - if the intake is the wrong length, it might cause some unhappy resonance which actually drops power, and this belief is compounded by articles from autospeed and even discussions on here.
http://autospeed.com.au/cms/article.html?&A=1379
http://autospeed.com.au/cms/article.html?&A=107749
http://www.aussiemagna.com/forums/archive/index.php/t-43664.html

I have an intake resonator plug in my top resonator.(thanks timi) It doesn't change the intake noise much. If you got rid of them all then it would change the noise a bit I think. Won't change the power at all. The resonators do so little.

That theory of having them full of air for initial throttle response is bullshit sorry oggy. The fact the air dragged out of them needs to be replaced by more air causes the same pressure to be needed to suck the air.

It's a momentary thing - the resonator is sealed and almost rigid, but it's under vacuum, so of course it's air will go into the engine, then air speed will accelerate and vacuum level reduce from an initial peak.

Maybe the air availability helps reduce flutter or chatter or something.

my verada has (had) 3 resonators - 1 on top after the maf, 1 under after the maf, and 1 under the snorkel before the filter. I wrecked a vrx and it only had the top after maf resonator, the other holes were never even cut out.

i guess the best analogy would be that of a capacitor in an electronic circuit

As Timi said, the later cars don't have all of them. So mitsubishi would remove power from their later cars maybe?

Oh wait, they only started removing them from the later cars to save money.

i believe they help with intake tuning , pressure waves coming back from the intake plenum from the valve operation etc can have an effect on airflow efficiency and these resonators can be used to optimise the flow pattern (google it for a better explanation) , im not sure if Mitsi apllied this to these engines but they have been used for this purpose before, and its not snakeoil. i choose to leave them on just in case, even though i have a pod semi shielded in the stock airbox, which may negate any stock intake tuning lol. there is a few good articles on the net, and it makes for interesting reading, sorry i cant remember it all,its been a long day!!