cactus_kid
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Anyone removed it?
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Helmholtz box removal
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cactus_kid
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Thank you. Good to know it fits. We aren't stuck with that damn sound tube are we ?
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cactus_kid
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Just checked a couple of on line dealers. The elbow is #15 in the intake diagram. Not available as a separate item. Gah ! Time to check the salvage yards
Rev'n Step
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Just remove thee tube and cap it with a silicone cap.
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Schwerin
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Bullitts done have a tube, its got a box hanging form it, and looking at it I'm not sure its removable. I havent had mine off to see though. it looks molded on.
Rev'n Step
Well-Known Member
Shows how much I have paid attention to that vs the GT lol. I should examine my Bullitt a bit better.
Schwerin
Well-Known Member
I've not had mine off to 100% check it fits but teh TB and airbox are th same sizes so I see no reason it shouldnt.
I plan to get the elbow from ebay or from someone selling a part out. I doubt there would be any REAL reason to remove it, it may help engine sound a little. There wouldn't be any performance change though.
Elp_jc
Well-Known Member
Yep. Bullitts have 'enhanced' (as in fake) sound thru the speakers, instead of the tube, due to the different intake. And that 'box' is a Helmholtz anti-resonance chamber, so DO NOT remove it, or you'd actually lose power, due to turbulence in the intake.
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Schwerin
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For sound requirements. It has 0 to do with power. If it in any way increased power they would have used it on the GT350 also. Anything removing air turbulence is done BEFORE the MAF, where it would matter. Not after it. Removing that box is one of the first mods on ANY car from an 90's Escort to a 2003 Mach1. Why do you think that NO aftermarket intakes has one built in?It's both. Look it up. Why do you think it's there?
Elp_jc
Well-Known Member
You don't want undesirable turbulence in an intake system, period. If the stock system has a 'box', it's because it needs it. If you want to remove it, remove it. It's not like it's going to lose 100HP. But it's there for a reason. The engine runs smoother with it, or Ford (or any other manufacturer) wouldn't spend the money to install it. Some cars don't have it because it's not needed. Mustangs have a freaking sound tube to put noise into the cabins, so it's not about not making noise, but do whatever you want with your car. I'm out of this discussion.
Schwerin
Well-Known Member
Like I said.. sound requirements. I'm VERY familiar with fluid dynamics. I've also been modifying cars for over 20years.
Like I said.. SOUND requirements, there are also SOUND requirements that OEMS need to meet. It's called Pressure Wave harmonics. They use it to eliminate sounds that people would likely find annoying or aggravating inside the cabin. Ever sat in a car before and after the intake tube was changed out? That sound change you hear? Yeah it's because you eliminated what was quieting those harmonics.
https://www.sciencedirect.com/topics/engineering/helmholtz-resonator
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