What is that thing on the Intake?

[ctrcbob]

I have an 03 Stock 300A and I was wondering what is that thing that sticks out the side of the intake tube.

Midway between the air filter and the intake manifold, on the side of the intake tube, there is an additional device, shaped like the letter "J" or "C". This device has only one open end. About 2½ inches in diameter. No air can go through it.

What is it and what does it do?

[RoyLPita]

It is a air baffle. It looks wierd but it prevents the "Whoosh" sound when you get on it.

[Joe Walsh]

The 'J' snorkle's only purpose is as a sound attenuator for the intake system.
Many members have removed theirs and plugged the hole with various round objects, including a PVC pipe cap from Lowes/Home Depot.

[wchain]

The 'J' snorkle's only purpose is as a sound attenuator for the intake system.
Many members have removed theirs and plugged the hole with various round objects, including a PVC pipe cap from Lowes/Home Depot.


Its also a good place the pipe the nitrous in......

[ckadiddle]

It is a air baffle. It looks wierd but it prevents the "Whoosh" sound when you get on it.Heh..that may be my first mod! I like that sound! :D Wonder if the spousal unit will notice the difference.... probably not, she drives very conservatively.. hhhmmm

[fastblackmerc]

I have an 03 Stock 300A and I was wondering what is that thing that sticks out the side of the intake tube.

Midway between the air filter and the intake manifold, on the side of the intake tube, there is an additional device, shaped like the letter "J" or "C". This device has only one open end. About 2½ inches in diameter. No air can go through it.

What is it and what does it do?
It's also known as the "walrus nose". Used to cut down on the intake noise. You can remove it and plug up the hole (I cut the closed end of the tube off and used a clamp to afix it in the openeing). Better yet get a CAI kit from Jay Tucker (he's a vendor on the site) and really hear the intake noise!

[ctrcbob]

OK, thanks. Now I know. I guess that it helps to even out the intake impulses when you get on it, and that keeps the whoosh noise down.

BTW. Great name - Walrus Nose. Thats exactly what it looks like.

[Ross]

It's the first, cheapest, and easiest do it yourself mod to remove that thing! BTW, my favorite plug that anyone has used for the hole is the now famous peanut butter jar lid.

[FlyinMerc]

Helmholtz Resonator. Picks out and enhances a particular frequency from a complex sound. Just like blowing over the top of a Coke bottle.


I have an 03 Stock 300A and I was wondering what is that thing that sticks out the side of the intake tube.

Midway between the air filter and the intake manifold, on the side of the intake tube, there is an additional device, shaped like the letter "J" or "C". This device has only one open end. About 2½ inches in diameter. No air can go through it.

What is it and what does it do?

[Bradley G]

BTW. Great name - Walrus Nose. Thats exactly what it looks like Quote LOL:D
I thought the same thing too!
It will dramaticaly quiet the whoosh sound.
Guy's like Lidio and BillyGman that have left thier Factory Induction/airbox in tact still have tremendous numbers:cool: .
Lidio's car W/ stock exhaust has the clearest note of supercharger whine and Billy with the Kooks is all about the muscle big block sound (close):P
Bradley G

[Mike Poore]

Helmholtz Resonator. Picks out and enhances a particular frequency from a complex sound. Just like blowing over the top of a Coke bottle.
For those in the group who believe my only thoughts are of buttermilk, Quats & such, Here's the math to explain how the above resonator works. There will be a quiz later.

(This is explained in an appendix below.) As a result, the pressure change p produced by a small volume change DV is just


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz3.GIF
Now the mass m is moved by the difference in pressure between the top and bottom of the neck, i.e. a nett force pS, so we write Newton's law for the acceleration a:


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz4.GIF

substituting for F and m gives: http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz5.GIF

So the restoring force is proportional to the displacement. This is the condition for Simple Harmonic Motion, and it has a frequency which is 1/2p times the square root of the constant of proportionality, so

http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz6.GIF
Now the speed c of sound in air is determined by the density, the pressure and ratio of specific heats, so we can write:


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz7.GIF
Let's put in some numbers: for a 1 litre bottle, with S = 3 square centimetres and L = 5 centimetres, the frequency is 130 Hz, which is about the C below middle C. (See notes (http://www.phys.unsw.edu.au/~jw/notes.html).) So the wavelength is 2.6 metres, which is much bigger than the bottle. This justifies, post hoc, the assumption made at the beginning of the derivation.

[Joe Walsh]

For those in the group who believe my only thoughts are of buttermilk, Quats & such, Here's the math to explain how the above resonator works. There will be a quiz later.

(This is explained in an appendix below.) As a result, the pressure change p produced by a small volume change DV is just


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz3.GIF
Now the mass m is moved by the difference in pressure between the top and bottom of the neck, i.e. a nett force pS, so we write Newton's law for the acceleration a:


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz4.GIF

substituting for F and m gives: http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz5.GIF

So the restoring force is proportional to the displacement. This is the condition for Simple Harmonic Motion, and it has a frequency which is 1/2p times the square root of the constant of proportionality, so

http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz6.GIF
Now the speed c of sound in air is determined by the density, the pressure and ratio of specific heats, so we can write:


http://www.phys.unsw.edu.au/~jw/graphics/Helmholtz7.GIF
Let's put in some numbers: for a 1 litre bottle, with S = 3 square centimetres and L = 5 centimetres, the frequency is 130 Hz, which is about the C below middle C. (See notes (http://www.phys.unsw.edu.au/~jw/notes.html).) So the wavelength is 2.6 metres, which is much bigger than the bottle. This justifies, post hoc, the assumption made at the beginning of the derivation.

Q: "WOW!..... Do you really know all that??"

A: "NO.....But I did stay at Holiday Inn last night!"

[Mike Poore]

Q: "WOW!..... Do you really know all that??"See? And you thought all I do is look through microscopes all day. Or, I'm not as dumb as I look.:rofl:

[Bigdogjim]

The 'J' snorkle's only purpose is as a sound attenuator for the intake system.
Many members have removed theirs and plugged the hole with various round objects, including a PVC pipe cap from Lowes/Home Depot.
The one who used the skippy peanut butter lid was the best!:rofl:

[Mike Poore]

The one who used the skippy peanut butter lid was the best!:rofl:
Yeh, Skippy, and that buxom little Mousketeer, Anette Funichello. I'm still in love. ;)