What is the little box on the air intake?
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I never had one of those, I'm not sure. Maybe a liquid trap. Kinda cool appendage. Like a prefiltered air reservoir. Maybe a sound related thing.
These are added to combat intake resonance that may intrude into the passenger compartment. When owners remove the factory intakes the intake is louder due to the filter design and removal of the intake resonators that are negating the intakes natural resonance.
I am actually surprised you have not seen more of these. They have been on production vehicles since the 80's.
I am actually surprised you have not seen more of these. They have been on production vehicles since the 80's.
Yup it is a sound baffle to take intake honk or moan sounds out. Most cars will have some version of them now. My little ZX2 commuter car has two of them! The new Mustangs have the opposite...a tube to pipe intake noise INTO the cabin!
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Maybe never thought about it....sound related it is! None of the cars I have owned have had a large appendage like that. What makes have them mainly?
my saturn VUE had one, my Mazda 5 has it too. my '96 MPV had something like it as well.
mfgrs have to design a car to meet 'drive by' noise limits. lots of noise comes from tires and air intake, not just exhaust. so, although enthusiasts like 'noise', it has to leave the factory 'quiet'.
mfgrs have to design a car to meet 'drive by' noise limits. lots of noise comes from tires and air intake, not just exhaust. so, although enthusiasts like 'noise', it has to leave the factory 'quiet'.
Makes? It may be faster to find which models do not have them. I have seen them on so many different makes. If in development the engine is found to produce an intrusive sound in the passenger compartment they may be used to tune out the sound. Toyota does not want a Lexus to sound like a boy racer when passing a trucker.
They do not always have to be large, they can be small or simply a tube. On the 1.9L ford used in the escort it had a tube that attached to a giant resonator infront of the driver side front wheel. This was attached before the filter housing but still for the same reason. Allot of these are before the air filter, some are after it as in Widmans case here.
They do not always have to be large, they can be small or simply a tube. On the 1.9L ford used in the escort it had a tube that attached to a giant resonator infront of the driver side front wheel. This was attached before the filter housing but still for the same reason. Allot of these are before the air filter, some are after it as in Widmans case here.
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If you are not removing most or all of the complete intake tract you may never notice them even if they are in place. Ever notice some vehicles with extremely long intakes running across the front of the engine bay perhaps? This is also part of resonance tuning. Length, diameter and baffles can all be used to tune the sound so it is pleasant to the ear.
The shape and location are new but the idea is old. If you ever have a chance to look under the hood of a full-sized (and I mean FULL-sized) Lincoln Town car from the mid 70s powered by the 460, look at the air cleaner. Its a conventional round 70-style Ford aircleaner with a snorkel and heat stove (probably even has a "460 4V" sticker on top), but some of them also had a cylinder that looked like an oil filter grafted onto the side. It was the same thing- a resonator to cancel out the drone at certain throttle settings and RPM.
Yeah, I have two gigantic resonators on my intake tube.
Eventually I want to upgrade to the 04 Police intake, which has no resonators (and a larger MAF).
Eventually I want to upgrade to the 04 Police intake, which has no resonators (and a larger MAF).
I was able to leave it on my 2002 pickup and fit the PowerCore in the same space as the original filter.
On others it may get left off. Of course with the pre-cleaner chamber and the vortex at the entrance, the PowerCore might not even need it.
On others it may get left off. Of course with the pre-cleaner chamber and the vortex at the entrance, the PowerCore might not even need it.
How are you adapting powercores? A generic connection like a cone filter?
The little boxes act as small "air springs" that allow the resonance to cancel themselves out. Some of the newer vehicles also have a massive resonator built in to the air intake (usually hidden in the fender/bumper) to get rid of the lower frequency noises that intrude in to the passenger compartment.
There is a nice kit available D080020.
It has a cyclone entrance, prechamber, powercore, and safety. It fit into the same tube that came on the pickup. On the T100 I had to adapt a reducer (The nice reducer Donaldson sells was a little too long.)
I gave one to the Nissan dealer and they installed it on a Frontier of theirs, and it looks like they will start offering them as options for all new and in-service SUV's.
Here is the final picture in the Hi-Lux. I'll also put a restriction monitor on it to know when it is time to change.
It has a cyclone entrance, prechamber, powercore, and safety. It fit into the same tube that came on the pickup. On the T100 I had to adapt a reducer (The nice reducer Donaldson sells was a little too long.)
I gave one to the Nissan dealer and they installed it on a Frontier of theirs, and it looks like they will start offering them as options for all new and in-service SUV's.
Here is the final picture in the Hi-Lux. I'll also put a restriction monitor on it to know when it is time to change.
Pablo,
There are usually resonators in the exhaust system as well for the same reasons.
There are usually resonators in the exhaust system as well for the same reasons.
For sure I have seen resonators on exhaust sytems. Just looked at a bunch of cars. No resonator on the intake. Honda, Volvo, Ford, Toyota, Mazda.....maybe only selected models.
Originally Posted By: Pablo
For sure I have seen resonators on exhaust sytems. Just looked at a bunch of cars. No resonator on the intake. Honda, Volvo, Ford, Toyota, Mazda.....maybe only selected models.
Have a look here. You'll see several in some of the pics.
Post 1108313, 1109037, 1128628 (has a huge one), 1544454, 1706538 and my personal favourite 1744662 because it's mine and one of the resonators looks like a stealth bomber.
http://www.bobistheoilguy.com/forums/ubb...t=21&page=1
Honda has them (they're just hidden better).
For sure I have seen resonators on exhaust sytems. Just looked at a bunch of cars. No resonator on the intake. Honda, Volvo, Ford, Toyota, Mazda.....maybe only selected models.
Have a look here. You'll see several in some of the pics.
Post 1108313, 1109037, 1128628 (has a huge one), 1544454, 1706538 and my personal favourite 1744662 because it's mine and one of the resonators looks like a stealth bomber.
http://www.bobistheoilguy.com/forums/ubb...t=21&page=1
Honda has them (they're just hidden better).
Hahahaha - yours IS HUGE.
Our Ody doesn't have one, nor does our Accord. My 850, my 262C, my 245Ti....nope. My Blazer, my Toyota, my Sirocco, nope.
I must say, most pictures didn't show resonators. Listen I trust you guys....
Our Ody doesn't have one, nor does our Accord. My 850, my 262C, my 245Ti....nope. My Blazer, my Toyota, my Sirocco, nope.
I must say, most pictures didn't show resonators. Listen I trust you guys....
Hmmm...I'm thinking back to my 1992 Accord..pretty sure it had one..
Sometimes they're under the intake tube or run parallel like a snorkel...sometimes an extension of the airbox..
I've known all my Honda's intimately. Have a look at this..
There's the resonator on a 2007 Odyssey. I told you Honda hides them well.
Sometimes they're under the intake tube or run parallel like a snorkel...sometimes an extension of the airbox..
I've known all my Honda's intimately. Have a look at this..
There's the resonator on a 2007 Odyssey. I told you Honda hides them well.
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