unsilencing stock intake

[Darchrow Enigma]

how many "silencers" does the stock intake system have? where are they, and how can get i rid of them?

[LittleWhiteBubble]

i wouldnt call them silencers, but there's a resonator box under the fender and another smaller one on the underside of the tubing between the airbox and the manifold.

[TCam01]

Originally Posted by LittleWhiteBubble

i wouldnt call them silencers, but there's a resonator box under the fender and another smaller one on the underside of the tubing between the airbox and the manifold.

yea good luck trying to remove the resonator attached to the stock box filter without having to replace the stock intake entirely though and i don't know what toyota was smokin when they came up with that box in the fender lol

[Darchrow Enigma]

i'll take a look,if it looks like a pain in the ass...i won't do it.

anyone know what that box in between the intake tube is? (anyone with a gen4 would have an easier time picturing this without an image)

it's a bulky box between the throttle body and the filter box, it also connects to the engine's PCV line. i was considering removing that replacing it with a straight aluminum tube, assuming that box restricts air passage some by sucking it in sideways from the intake path.

[PortugalFocus]

I did it a little while ago. I didn't notice any "performance" increase but it looks much cleaner than the OE goofy resonator.

[LynchburgCSI]

Originally Posted by TCam01

i don't know what toyota was smokin when they came up with that box in the fender lol

Family sedan. It needs to be quiet. Therefore, resonator in the only place it would fit. The fender.

Originally Posted by Darchrow Enigma

anyone know what that box in between the intake tube is?

It's another (smaller) resonator.

[Darchrow Enigma]

Originally Posted by LynchburgCSI

It's another (smaller) resonator.

"smaller" you say? it's not huge but pretty big...are you saying the resonator in the fender is even bigger? sounds like a pain to remove (if even possible without hindering the intake's function).

[Kiwi-Corolla]

The resonator box inside the fender is fairly easy to take out, and does allow slightly more air to enter the filter. I removed it on my Corolla to install the CAI and also on my brother's Caldina GT-T (3S-GTE) a few weeks ago and we noticed that it didn't lag as much when getting on boost.

As for the second resonator closest to the throttle body (after the air filter), it actually does more than just silence the intake. In 98% of applications, it's designed to match the particular characteristics of the engine and can have a huge effect on the smoothness of the power delivery and bottom-end torque. Most of us remove this part when we replace our intakes with a nice shiny aluminium pipe and pod filter, but by doing this we are actually reducing power.

As proven in real-life tests, removing the inlet resonator will see drops of around 3kW-5kW throughout the entire rev range, with things starting to return to normal around the 6000rpm mark. This has been tested many times on a dyno by technicians, and manufacturers such as ARC now even have inlet resonators side-branched off some of their inlet systems. You won't notice these losses during driving, but will on a dyno.

A larger inlet resonator will produce slightly better top end results, while a smaller inlet resonator will see slightly better performance in the lower rev range. Bear in mind that you must have a clean air filter or you won't see any gains no matter what you do.

So at the end of the day, if you have the option to keep the inlet resonator closest to the throttle body, do it. If not, then it's no great loss, but a loss nevertheless

EDIT: This is the photo I took after removing the resonator box in the fender of my Corolla. My brother's Caldina fender resonator was almost exactly the same size, so I suspect they'd be a very similar size on Camrys:

[Darchrow Enigma]

how does that inlet resonator help the engine? it seems to me like it would slow down the air entering the throttle.

[Kiwi-Corolla]

Originally Posted by Darchrow Enigma

how does that inlet resonator help the engine? it seems to me like it would slow down the air entering the throttle.

I had a large article about it in a magazine a little while ago so I'll see if I can find it. It had something to do with the volume of the inlet resonator (for example 0.4 gallons) in comparison to the engine displacement (1600cc etc). They tried it with a range of different resonators, including things like Coke bottles, and each produced different results depending on the internal volume of the resonator.

[LynchburgCSI]

Scott, removing the resonator for us camry guys doesn't do us any good power wise, sadly.

Originally Posted by Darchrow Enigma

"smaller" you say? it's not huge but pretty big...are you saying the resonator in the fender is even bigger? sounds like a pain to remove (if even possible without hindering the intake's function).

The res in the fender is bigger, yes. It's not terribly hard to remove. Pop off the driver's wheel and wheel well cover, then just rip her out.

[Kiwi-Corolla]

Originally Posted by LynchburgCSI

Scott, removing the resonator for us camry guys doesn't do us any good power wise, sadly.

Yeah that's a shame. It didn't make a noticeable difference on my Corolla either. It's a good way to remove about half a kilogram though

[LynchburgCSI]

^

[Darchrow Enigma]

as long as the things i remove doesn't diminish power, and makes it louder (even if negligible lol). i really don't want short ram.

[Chris Crash]

I thought the larger resonator/box was a water collector? So that water the gets in the system drips down into it? Or something.