Sound tube delete

[therealdannye]

LOL @ the guys trying to follow the instructions and remove the 10mm bolt. You unclip it through the front and middle until you're left with just that bolt and then pull out and up until it gives.

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[15dib]

I pulled the dam thing. Took less than 30 secs.

 

[2015Etrac]

Any warranty concerns from not having it installed? I know it can't cause any issues by removing it, but I know dealers will try to do anything possible to find reasons to void repairs.

 

[BmacIL]

Any warranty concerns from not having it installed? I know it can't cause any issues by removing it, but I know dealers will try to do anything possible to find reasons to void repairs.

Nope. It has zero effect on anything functioning. They'll look a heck of a lot harder at your Steeda intake. Either way, they cannot technically deny warranty until they prove whatever you did caused a problem. Magnussen Moss.

 

[aham23]

lol at all the tough guys who say just yank it.

i yanked and yanked and yanked. yeah, lots of yanking. could not rip it out. the strut bar/brace are a problem for getting the right "just rip it out" angle. eventually after a couple trips to Home Dept to get the smallest flattest ratchet i got it out. if you dont have skinny arms you need extensions for sure. i recommend watching the CJ Pony parts vid for installing a Roush CAI as he covers getting it out.

 

[mustang_guy]

I cant believe people are struggling with the removal. It took me all 1-2 minutes with tools. :lol: Yanking on it? Really? Good way to damage or break stuff

 

[Thundersteel]

the two helmholtz resonators on the intake

Actually, they DO serve a purpose:

A common misconception among many auto enthusiasts and hot-rodders is that the air intake resonator is there for the sole purpose of muffling the sound of the engine on an older car. While dampening the sound of the engine is one of the purposes of the air intake resonator, it is not the primary purpose. The primary purpose of the air intake resonator is to inhibit pressure wave harmonics, which causes air pressure in the engine and restricts the amount of airflow through the RPM spectrum. In effect, the air intake resonator, via its expansion chamber, slows down the air emerging from the engine. This reduces the engine intake noise and increases the amount of horsepower available.

From another source:

To the average hot-rodder, intake resonators go on the same pile as smog pumps, catalytic converters, exhaust gas recirculation valves and charcoal canisters. But imagine which pile the resonator would end up in if that same customizer knew it was more than a plastic muffler -- it's actually an important part of the engine's intake system, and may add a fairly significant amount of horsepower.

Design and Construction
The resonator itself couldn't be simpler in design; it's basically just an expansion chamber or wide spot in the otherwise-smooth intake pipe. It may or may not contain some kind of baffle or plate, depending upon the design and the intent of the designers. Resonators come in two types: In-line resonators are open chambers that sit in the intake tube, while side-branch resonators are chambers that sit next to the tube and are connected to it via a small duct or channel.

The Common Misconception
Most hot-rodders and car enthusiasts think of intake resonators as simple mufflers in the intake tube, devices designed to siphon all the awesomeness out of a car's sound track to appease soccer moms and senior citizens. That makes it a prime candidate for the "chuck-it" school of auto modification. After all, it's basically just a plastic tumor growing off of a tube that should by definition be as smooth and blemish free as possible. While sound control is indeed part of the resonator's job, the sound control itself is really more of a side effect of its primary purpose.

Pressure Wave Harmonics
Air flowing into your cylinder head's intake port doesn't move in a straight line while the valve is open, then politely stop in its tracks to await another valve opening. When the valve closes, the moving column of air slams into it, then compresses and bounces back like a spring. This pressure wave travels backward at the speed of sound until the intake runner opens up or it hits something, and then it bounces back toward the cylinder. This is the "first harmonic." The pressure wave actually bounces back and forth two or three more times before the intake valve opens again.

Intake Tube Pulses
The resonator in your intake is technically known as a Helmholz resonator, an acoustic device used to control pressure wave harmonics. Air bouncing back out of your engine and into the intake tube doesn't do it in a single pulse the way it would in a single intake runner; the multiple pistons put out pressure waves at their own intervals, and some of those are going to try to bounce back in while others are going out. The result is a "clog" or high pressure area in your intake tube that ultimately limits airflow through almost the entire rpm spectrum.

The Resonator
Adding an expansion chamber to the intake tube forces air coming back out of the engine to slow down to fill the cavity, thus expending a great deal of its energy and slowing the pressure wave reversion. This slowdown allows fresh air to flow toward the engine without fighting pressure reversion waves the entire way, thus aiding in cylinder filling. Since these pressure waves are essentially sound, giving them a place to expend their energy before exiting the air filter box ends up dampening the intake noise and quieting the engine. Thus, the resonator helps to make the engine paradoxically quieter and more powerful.

 

[Late Starter]

I have the stock exhaust. After removing the sound tube, couldn't tell any difference in interior noise. Can't figure why Ford goes through the expense to install such a worthless mess.

 

[15dib]

Only thing you'll break is that stupid design ford did lol. If you can't yank it out is cause you're not pulling hard enough or well you might have to start hitting the gym lol. Seriously tho it's not hard at all.

 

[Rock&Roll]

I have the stock exhaust. After removing the sound tube, couldn't tell any difference in interior noise. Can't figure why Ford goes through the expense to install such a worthless mess.

That's what I wanted to read. Ordered a GT Strut brace for X-Mas and I also got the Sound Tube delete kit so I'll be hanging in the garage that week.

 

[MagneticMan]

i recommend watching the CJ Pony parts vid for installing a Roush CAI as he covers getting it out.

link here for easy reference

http://www.cjponyparts.com/roush-cold-air-intake-kit-gt-2015-2017/p/CAK171/

 

[Rock&Roll]

Appreciate all the info.


What I don't understand is how that 10mm bolt/nut holds the Sound thingy on and ... do you need to put the 10mm bolt/nut back on afterwards ?

I realize you need to plug the hole when you remove the Sound Tube thingy.

 

[Rebellion]

Appreciate all the info.


What I don't understand is how that 10mm bolt/nut holds the Sound thingy on and ... do you need to put the 10mm bolt/nut back on afterwards ?

I realize you need to plug the hole when you remove the Sound Tube thingy.

It has a flange with a hole for the bolt. The bolt actually squishes the flange into the firewall. If you remove it, you'll need to put it back...which was a ton of trouble, so I just yanked the whole assembly out. Obviously, the hole on the flange, where the bolt was, got stretched so it slipped out.

If you don't plan to put it back, just yank the whole thing. For the record, and not trying to offend anyone, I've seen a lady do it with a ton of effort and like 4 tries, but she yanked it out.

 

[vernonator]

I removed it, but good lord it is a PITA! The bolt attaching it to the firewall is a bitch.

I took it out when I did an aftermarket intake. I like how it cleans up the engine bay a bit. I didnt really notice any change in sound. I took the tube out in my STi and noticed it was a bit quieter, though. The GT was way louder (aftermarket exhaust) anyway

Bolt Shmolt....I took off the upper segments then gave the last bit a sharp tug and it popped right off, leaving the bolt behind.

 

[1badrz28]

Easier to go from underneath. It's a 5 minute job.

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