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Do I really need this resonator box? #4049903 03/26/16 11:15 PM
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Nick1994 Offline OP
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Intake air hose on my Camry broke, so I ordered a new Dorman one. There's a resonator box underneath it with a hose that goes to it, the hose had a hole. I couldn't find an aftermarket replacement hose, so I called the dealership. They want $76 plus tax for the hose. Not gonna happen for a beater-commuter car.

I went to Home Depot and bought a 1-1/4" plug and a hose clamp for $3, fits perfect. Took out the resonator box, is it really necessary? What does it do, I'm guessing sound dampening? I drove it around the block, power is the same and so is sound, maybe a tiny bit louder, but I really don't think so.







2015 Hyundai Genesis 5.0L 57k Mobil 1 5w30 & Wix
2000 Toyota Camry 2.2L 236k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 150k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4049905 03/26/16 11:22 PM
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Colt45ws Offline
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The resonator is purely for sound dampening. It will not hurt power or economy one bit.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 86k
Pennzoil Conv HM 5W30, Fram XG2
Re: Do I really need this resonator box? [Re: Nick1994] #4049924 03/27/16 12:08 AM
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dishdude Online Content
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Yep, it's just a muffler. I would have done exactly what you did and enjoy a little more growl out of the engine at WOT.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI M1 Euro 0w-40 Wix WL10024
2019 Tiguan Castrol Edge Pro 0w-20
Re: Do I really need this resonator box? [Re: Nick1994] #4049928 03/27/16 12:12 AM
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Merkava_4 Offline
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What's that box on the left side of the 1st picture where the spark plug wires are going over ?

Re: Do I really need this resonator box? [Re: Merkava_4] #4049933 03/27/16 12:29 AM
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Nick1994 Offline OP
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Originally Posted By: Merkava_4
What's that box on the left side of the 1st picture where the spark plug wires are going over ?
You mean the valve cover?



2015 Hyundai Genesis 5.0L 57k Mobil 1 5w30 & Wix
2000 Toyota Camry 2.2L 236k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 150k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4049937 03/27/16 12:52 AM
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OneEyeJack Offline
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You've just done some barn yard maintenance. Good on you.

Re: Do I really need this resonator box? [Re: Colt45ws] #4049956 03/27/16 02:24 AM
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KingCake Offline
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Originally Posted By: Colt45ws
The resonator is purely for sound dampening. It will not hurt power or economy one bit.


WRONG. They are also used to tune the intake air impulse to increase midrange torque per toyota.

Re: Do I really need this resonator box? [Re: Nick1994] #4049957 03/27/16 02:26 AM
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Colt45ws Offline
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Doubt you'll notice it without a dyno.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 86k
Pennzoil Conv HM 5W30, Fram XG2
Re: Do I really need this resonator box? [Re: Nick1994] #4049976 03/27/16 04:14 AM
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Eddie Offline
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Agreed, that is part of a system to reduce resonance as KIngCake said. It will cause no issues for your daily driver/beater. Ed


2014 CX5 Touring 2.5L :-)
Re: Do I really need this resonator box? [Re: Nick1994] #4050052 03/27/16 07:36 AM
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AZjeff Offline
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It looks like the plug might be long enough to extend into the intake tube. If so you might want to trim it back, you don't need any added restrictions or turbulence. As said these boxes are used to tune in or out resonant frequencies in the intake impulse as well as noise control. You'll lose a little something without it, Toyota went to some trouble to gain that wee bit of torque or mpg. Aftermarket intake tubes eliminate these boxes (K&N, Airaid, etc) all the time and claim gains but they're also smoothing the pipe by eliminating the connection.



14 RAV4 2.5 5W-20 PP
18 Nissan Titan 5.6 DI, 0W-20 QSUD

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: Do I really need this resonator box? [Re: AZjeff] #4050268 03/27/16 12:05 PM
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Nick1994 Offline OP
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Originally Posted By: AZjeff
It looks like the plug might be long enough to extend into the intake tube. If so you might want to trim it back, you don't need any added restrictions or turbulence. As said these boxes are used to tune in or out resonant frequencies in the intake impulse as well as noise control. You'll lose a little something without it, Toyota went to some trouble to gain that wee bit of torque or mpg. Aftermarket intake tubes eliminate these boxes (K&N, Airaid, etc) all the time and claim gains but they're also smoothing the pipe by eliminating the connection.
the plug doesn't go much further past the hose clamp, still plenty of room before it impedes air flow in the tube.

I'll keep an eye on power/noise/fuel economy and see if I notice a difference.


2015 Hyundai Genesis 5.0L 57k Mobil 1 5w30 & Wix
2000 Toyota Camry 2.2L 236k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 150k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4050287 03/27/16 12:36 PM
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bblackmon19 Offline
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It will run fine without the resonator, but you will lose power and volumetric efficiency at certain rpms. The pressure wave caused by the intake valves closing will now slow down the intake air.


95' Infiniti g20t auto t25 turbo kit 190k, 0w-40 Mobil
Re: Do I really need this resonator box? [Re: Nick1994] #4050753 03/28/16 01:55 AM
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DoubleWasp Offline
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I bet you never notice anything without a serious computer attached to your car.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Do I really need this resonator box? [Re: Nick1994] #4050754 03/28/16 02:01 AM
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dishdude Online Content
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I want to know how what box does anything for power.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI M1 Euro 0w-40 Wix WL10024
2019 Tiguan Castrol Edge Pro 0w-20
Re: Do I really need this resonator box? [Re: dishdude] #4050773 03/28/16 02:59 AM
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Olas Offline
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Originally Posted By: dishdude
I want to know how what box does anything for power.


There are effects to increase the V.E on N.A engines. As with most tuning, this Intake tuning can be a compromise and only truly effective over a certain RPM range, but picking a choosing the design to fit in around the engine, the "boost" given can be used to smooth out the output over the engine.
Tuning can be done via the length of the intake runners, and their size. Long thin intake runners will speed up the gas velocity and the momentum of the fast moving air will help pack the cylinder full even as the intake valve is closing. This will boost power at lower engine speeds, but the thin runner design will restrict airflow at high speeds. Tuning and resonance of the pipework will also help.
As the engine sucks in air, there are pulses of high and low pressure. The tuning is designed use these pulses of pressure to get more into a cylinder, by adjusting the size and length of the intake. This effect is known as Helmholtz Resonance. The resonance effect will only work in a given intake size as a specific RPM range, so this can either be used to remove a flat spot, add extra torque in lower RPMs where most day to day driving occurs, or a variable length Intake system can be used to provide two resonant effects at different RPM ranges. An example of this is the BMW DISA flap in some manifolds.

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