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Do I really need this resonator box? #4049903
03/27/16 12:15 AM
03/27/16 12:15 AM
Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
Nick1994 Offline OP
Nick1994  Offline OP

Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
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 Sonata 2.4L 99k STP Synthetic HM 10w30 & OEM
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4049905
03/27/16 12:22 AM
03/27/16 12:22 AM
Joined: Aug 2006
Posts: 10,024
Central Washington
Colt45ws Offline
Colt45ws  Offline

Joined: Aug 2006
Posts: 10,024
Central Washington
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 01:08 AM
03/27/16 01:08 AM
Joined: Nov 2008
Posts: 9,971
Phoenix
dishdude Offline
dishdude  Offline

Joined: Nov 2008
Posts: 9,971
Phoenix
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
Re: Do I really need this resonator box? [Re: Nick1994] #4049928
03/27/16 01:12 AM
03/27/16 01:12 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline

Joined: Jan 2007
Posts: 17,501
Clovis, CA
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 01:29 AM
03/27/16 01:29 AM
Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
Nick1994 Offline OP
Nick1994  Offline OP

Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
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 Sonata 2.4L 99k STP Synthetic HM 10w30 & OEM
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4049937
03/27/16 01:52 AM
03/27/16 01:52 AM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline

Joined: Sep 2010
Posts: 7,485
S California
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 03:24 AM
03/27/16 03:24 AM
Joined: Nov 2015
Posts: 1,462
KingCake Offline
KingCake  Offline

Joined: Nov 2015
Posts: 1,462
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 03:26 AM
03/27/16 03:26 AM
Joined: Aug 2006
Posts: 10,024
Central Washington
Colt45ws Offline
Colt45ws  Offline

Joined: Aug 2006
Posts: 10,024
Central Washington
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 05:14 AM
03/27/16 05:14 AM
Joined: Dec 2003
Posts: 10,346
Florida, Cape Coral
Eddie Offline
Eddie  Offline

Joined: Dec 2003
Posts: 10,346
Florida, Cape Coral
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 08:36 AM
03/27/16 08:36 AM
Joined: Jan 2011
Posts: 3,891
PV Az @ 5000'
AZjeff Online content
AZjeff  Online Content

Joined: Jan 2011
Posts: 3,891
PV Az @ 5000'
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.


86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP
18 Nissan Titan 5.6 DI, 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 01:05 PM
03/27/16 01:05 PM
Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
Nick1994 Offline OP
Nick1994  Offline OP

Joined: Feb 2013
Posts: 11,597
Phoenix, AZ
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 Sonata 2.4L 99k STP Synthetic HM 10w30 & OEM
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: Do I really need this resonator box? [Re: Nick1994] #4050287
03/27/16 01:36 PM
03/27/16 01:36 PM
Joined: Jan 2012
Posts: 31
maryland
bblackmon19 Offline
bblackmon19  Offline

Joined: Jan 2012
Posts: 31
maryland
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 02:55 AM
03/28/16 02:55 AM
Joined: May 2012
Posts: 6,709
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline

Joined: May 2012
Posts: 6,709
Fort Lauderdale, FL
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 03:01 AM
03/28/16 03:01 AM
Joined: Nov 2008
Posts: 9,971
Phoenix
dishdude Offline
dishdude  Offline

Joined: Nov 2008
Posts: 9,971
Phoenix
I want to know how what box does anything for power.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI
Re: Do I really need this resonator box? [Re: dishdude] #4050773
03/28/16 03:59 AM
03/28/16 03:59 AM
Joined: Dec 2013
Posts: 3,998
Manchester, England
Olas Offline
Olas  Offline

Joined: Dec 2013
Posts: 3,998
Manchester, England
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.


Cable ties should hold it
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