Removing intake resinator

[DrDusty86]

I was wondering if there would be any issues if I removed the resinator in the intake on my ZX2? I saw a small gain of 2hp/2.5ftlbs on a dyno sheet someone had posted. The airbox should still be sealed. It may be a little noisier, but is that all?
Dusty

 

[ARCOgraphite]

Is that MAF or speed density metering? If in airbox snorkle shouldnt hurt too much - but big resonances across an AFM will cause metering errors.

 

[DrDusty86]

No, it is between the TB and MAF sensor. So it is after the MAF sensor. It looks like it is just a noise reducer. a baffle is all

 

[DrDusty86]

On the twerp forums, the kids say it won't set a CE light.. but it's a little louder and makes TONS more power..lol

 

[TallPaul]

The intake resonator can serve one or both of two purposes: Quiet the intake noise and improve the intake flow. On my 20-01 Ford Ranger, the intake resonator is pretty big, like a flattened gallon jug. I took it off in mid winter and it didn't seem to make a difference in power, but by summer (presumably the hot weather) I noticed a lack of power at low speed. I put it back on and it really improved low rpm power. There are some good articles out on the web.

 

[DrDusty86]

Thanks Paul,
That was the kind of feedback I was looking for. Yes, mine is that shape but a little smaller

 

[SwampSurvivor]

I did it on the Taurus ... noticed no difference. Didn't even growl any more.

 

[Hokiefyd]

I've removed resonators from various vehicles before, but usually re-install them after some undesirable effect after removal. Sometimes it's an unflattering noise, sometimes it's a wonky torque curve, sometimes it's something else.

It can't hurt to play around with it. Just get the right-sized plug for it.

 

[cutter]

Is it anything like a butterfly valve? I have one in my car, the valve uses vacuum and opens up like the one in the throttle body. It's the first thing in the airbox, before filter and maf. With it off, there are some gains at the top end and nothing down low. And on some days, it feels like the low end gets even lower.

 

[TallPaul]

The auto parts store sells these rubber plugs to replace core plugs (commonly known as freeze plugs). They rubber plugs come in various sizes and have a nut to tighten them. I have used them to plug intake resonator openings. Here is the setup I had on the Ranger:

What the resonator looks like (on lower right of photo):

 

[cptbarkey]

are you having performance issues at the moment? how about a can of seafoam and smoke up the neighborhood?

 

[TallPaul]

What about the exhaust side? Have you opened that up at all?

 

[dparm]

2hp at WOT at redline? You won't even feel that.

 

[Clevy]

I've done many things in the name of more power. K&N cai's,k&n filters,removing the silencers on stock intakes and you know what kind of gain I got........nothing. Stock intakes are designed as such for a reason. A cai is a waste of money. Spend that money on a dynotune,headers,or something that will improve power. Pulling that boot off will cost you bottom end torque at just off idle because it helps velocity.
Just my experiences. Your results may vary

 

[Clevy]

Originally Posted By: TallPaul
The intake resonator can serve one or both of two purposes: Quiet the intake noise and improve the intake flow. On my 20-01 Ford Ranger, the intake resonator is pretty big, like a flattened gallon jug. I took it off in mid winter and it didn't seem to make a difference in power, but by summer (presumably the hot weather) I noticed a lack of power at low speed. I put it back on and it really improved low rpm power. There are some good articles out on the web.

This.... Agreed

 

[mechtech2]

You have TWO resonators on a stock ZX2.

Go get a stepped piece of exhaust pipe at a local auto parts store - this is because the ends of the stock resonator are different sizes.[some used stepped PCV pipe from Home Cheapo].

Cut to length if necessary and install it. Only $5 or so!

That resonator is there for noise attenuation. The car will run better.

Also note that the stock air filter housing snorkel is the size of a dime - very restrictive. This can be cut off and a piece of larger PVC pipe fitted and put through the fender with the stock rubber gasket removed.
But first, remove the 'milk jug' resonator underneath the air filter housing - a big black thing. This will also allow an extra inlet to breath air in. This should be enough for a stock engine.

 

[DrDusty86]

Mech, Will removing the 2nd resonator kill the power or "wake it up"?

 

[dwcopple]

Originally Posted By: DrDusty86
Mech, Will removing the 2nd resonator kill the power or "wake it up"?
it'll sound woke up...

 

[OVERKILL]

Originally Posted By: dwcopple
Originally Posted By: DrDusty86
Mech, Will removing the 2nd resonator kill the power or "wake it up"?
it'll sound woke up...


Bingo.

 

[mechtech2]

Which one do you consider he 'second' resonator?
The one at the air filter housing will open up a hole to breathe through - the stock snorkel alone is a cork.
The one near the throttle body is restrictive and convoluted - it helps breathing with a plain pipe there instead.

Pay no attention to the ignorant comments by dwcopple and overkill.
I am an expert on these cars - they have no clue here.